Thematische Bibliographien / Hemodynamické parametry

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Auswahl der wissenschaftlichen Literatur zum Thema „Hemodynamické parametry“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Hemodynamické parametry"

Rzheutskaya, Ryta E. "Characteristics of Hemodynamic Disorders in Patients with Severe Traumatic Brain Injury." Critical Care Research and Practice 2012 (2012): 1–11. http://dx.doi.org/10.1155/2012/606179.

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Purpose. To define specific features of central hemodynamic parameter changes in patients with isolated severe traumatic brain injury (STBI) and in patients with clinically established brain death and to determine the required course of treatment for their correction.Data and Research Methods. A close study of central hemodynamic parameters was undertaken. The study involved 13 patients with isolated STBI (group STBI) and 15 patients with isolated STBI and clinically established brain death (group STBI-BD). The parameters of central hemodynamics were researched applying transpulmonary thermodilution.Results. In the present study, various types of hemodynamic reaction (normodynamic, hyperdynamic, and hypodynamic) were identified in patients with isolated STBI in an acute period of traumatic disease. Hyperdynamic type of blood circulation was not observed in patients with isolated STBI and clinically established brain death. Detected hemodynamic disorders led to the correction of the ongoing therapy under the control of central hemodynamic parameters.Conclusions. Monitoring of parameters of central hemodynamics allows to detect the cause of disorders, to timely carry out the required correction, and to coordinate infusion, inotropic, and vasopressor therapy.

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Franceschi, Claude. "Definition of the venous hemodynamics parameters and concepts." Veins and Lymphatics 2, no. 4 (2013): 1. http://dx.doi.org/10.4081/hemodynamics.2013.1.

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Ogilvie, Leslie M., Brittany A. Edgett, Jason S. Huber, et al. "Hemodynamic assessment of diastolic function for experimental models." American Journal of Physiology-Heart and Circulatory Physiology 318, no. 5 (2020): H1139—H1158. http://dx.doi.org/10.1152/ajpheart.00705.2019.

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Traditionally, the evaluation of cardiac function has focused on systolic function; however, there is a growing appreciation for the contribution of diastolic function to overall cardiac health. Given the emerging interest in evaluating diastolic function in all models of heart failure, there is a need for sensitivity, accuracy, and precision in the hemodynamic assessment of diastolic function. Hemodynamics measure cardiac pressures in vivo, offering a direct assessment of diastolic function. In this review, we summarize the underlying principles of diastolic function, dividing diastole into two phases: 1) relaxation and 2) filling. We identify parameters used to comprehensively evaluate diastolic function by hemodynamics, clarify how each parameter is obtained, and consider the advantages and limitations associated with each measure. We provide a summary of the sensitivity of each diastolic parameter to loading conditions. Furthermore, we discuss differences that can occur in the accuracy of diastolic and systolic indices when generated by automated software compared with custom software analysis and the magnitude each parameter is influenced during inspiration with healthy breathing and a mild breathing load, commonly expected in heart failure. Finally, we identify key variables to control (e.g., body temperature, anesthetic, sampling rate) when collecting hemodynamic data. This review provides fundamental knowledge for users to succeed in troubleshooting and guidelines for evaluating diastolic function by hemodynamics in experimental models of heart failure. Listen to this article’s corresponding podcast at https://ajpheart.podbean.com/e/assessment-of-diastolic-function/ .

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ARYNOV, A. A., N. Z. SHAPATOVA, and I. М. SMAGINA. "Diagnostics and treatment of hemodynamic disorders in cancer patients: current trends and own experience." Oncologia i radiologia Kazakhstana 55, no. 1 (2020): 28–29. http://dx.doi.org/10.52532/2663-4864-2020-1-55-28-29.

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Relevance: Hemodynamic disorders occupy a central position among pathological syndromes in patients receiving intensive care. Still, their diagnostics and treatment are sometimes delayed, and hemodynamic parameters and types of blood circulation are misinterpreted. This adds to the severity of such disorders and increases mortality. The purpose of the study was to analyze the diagnostics and treatment of hemodynamic disorders in cancer patients. Results: The applied methods of clinical diagnostics and non-invasive monitoring of hemodynamic parameters correlated well with invasive monitoring methods and have proven useful in the everyday practice of intensive care. Conclusion: A combination of methods of clinical diagnosis of hemodynamic disorders and with modern non-invasive methods of measuring central hemodynamics parameters allows for earlier and more accurate diagnostics and correction of hemodynamic disorders in the perioperative period in cancer patients.

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Uedono, Hideki, Akihiro Tsuda, Eiji Ishimura, et al. "U-shaped relationship between serum uric acid levels and intrarenal hemodynamic parameters in healthy subjects." American Journal of Physiology-Renal Physiology 312, no. 6 (2017): F992—F997. http://dx.doi.org/10.1152/ajprenal.00645.2016.

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Hyperuricemia has been reported to affect renal hemodynamics. In a recent study, both low and high levels of serum uric acid (SUA) were found to be associated with loss of kidney function. The goal of this study was to evaluate the relationship between SUA levels and intrarenal hemodynamic parameters in healthy subjects, using plasma clearance of para-aminohippurate (CPAH) and inulin (Cin). Renal and glomerular hemodynamics were evaluated by simultaneous measurements of CPAH and Cin in 48 healthy subjects (54.6 ± 13.4 yr). Intrarenal hemodynamic parameters, including efferent and afferent (Ra) arteriolar resistance, were calculated using Gómez’s formulas. Relationships of SUA levels with these intrarenal hemodynamic parameters were examined. In quadratic regression analysis, SUA levels had a significant inverse U-shaped relationship with Cin ( P < 0.0001, R2 = 0.350) and CPAH ( P = 0.0093, R2 = 0.188) and a U-shaped relationship with Ra ( P = 0.0011, R2 = 0.262). In multiple regression analysis with normal (3.5–6.0 mg/dl) and mildly low or high (<3.5 or >6.0 mg/dl) SUA levels entered as dummy variables of zero and one, respectively, mildly low or high SUA levels were significantly and independently associated with Ra (β = 0.230, P = 0.0403) after adjustment for several factors ( R2 = 0.597, P < 0.0001). Both mild hyperuricemia and mild hypouricemia are significantly associated with increased Ra, although weakly. The increase in Ra in subjects with mild hyperuricemia or hypouricemia may be related to renal hemodynamic abnormalities, possibly leading to a decline in renal function.

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Arynov, A. A., N. Z. Shapatova, and I. M. Smagina. "Diagnostics and treatment of hemodynamic disorders in cancer patients: current trends and own experience." Oncologia i radiologia Kazakhstana 55, no. 1 (2020): 32–34. http://dx.doi.org/10.52532/2521-6414-2020-1-55-32-34.

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Relevance: Hemodynamic disorders occupy a central position among pathological syndromes in patients receiving intensive care. Still, their diagnostics and treatment are sometimes delayed, and hemodynamic parameters and types of blood circulation are misinterpreted. This adds to the severity of such disorders and increases mortality. The purpose of the study was to analyze the diagnostics and treatment of hemodynamic disorders in cancer patients. Results: The applied methods of clinical diagnostics and non-invasive monitoring of hemodynamic parameters correlated well with invasive monitoring methods and have proven useful in the everyday practice of intensive care. Conclusion: A combination of methods of clinical diagnosis of hemodynamic disorders and with modern non-invasive methods of measuring central hemodynamics parameters allows for earlier and more accurate diagnostics and correction of hemodynamic disorders in the perioperative period in cancer patients.

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Blissitt, Patricia A. "Hemodynamic Monitoring in the Care of the Critically Ill Neuroscience Patient." AACN Advanced Critical Care 17, no. 3 (2006): 327–40. http://dx.doi.org/10.4037/15597768-2006-3010.

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Hemodynamic monitoring in the care of the critically ill neuroscience patient provides information that assists the clinician in minimizing secondary neuronal injury. Whereas no technology replaces the critical care nurse’s physical assessment, hemodynamic and neurological monitoring provides additional data beyond what is possible with the clinical examination alone. If neurological technology, such as intracranial pressure monitoring, is not available, hemodynamic monitoring along with the neurological examination provides limited but useful information essential to minimizing secondary neuronal injury. The use of hemodynamic monitoring in critically ill neuroscience patients is best exemplified in the management of cerebral vasospasm after aneurysmal subarachnoid hemorrhage. Although improved outcomes have not been scientifically substantiated, multimodality monitoring of intracranial dynamics and systemic hemodynamics and manipulation of these parameters during hypertensive hypervolemic hemodilution therapy may lessen the incidence of cerebral infarction secondary to vasospasm. Monitoring systemic hemodynamics and intracranial dynamics simultaneously assists in prevention, prompt recognition, and effective treatment of neurological deterioration.

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Khokonova, Tamara Muratovna, Sofiat Khasenovna Sizhazheva, Zhaneta Huseynovna Sabanchieva, et al. "Analysis of hemodynamic parameters and quality of life in patients with chronic kidney disease and arterial hypertension." Revista de la Universidad del Zulia 12, no. 33 (2021): 274–87. http://dx.doi.org/10.46925//rdluz.33.19.

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Purpose. The work is devoted to study the effects of antihypertensive, lipid-lowering and metabolic therapy in office and the average hemodynamic parameters, the parameters of central pressure in the aorta, vascular wall stiffness and quality of life in patients with CKD stage 3 in combination with arterial hypertension of 1-2 degrees, and without it. Materials and methods. Were examined patients with arterial hypertension of 1-2 degrees and CKD stage 3. Measured hemodynamic parameters with the help of a daily BP monitor “BPLab”. The quality of life of patients was assessed by the questionnaire MOS SF36. Results. The greatest changes in the indicators of central hemodynamics and vascular stiffness were noted in the group of patients with comorbidity. Conclusion. The combination of antihypertensive therapy (losartan and diltiazem) with meldonium and rosuvastatin significantly decreases indices of central and peripheral hemodynamics and vascular stiffness. Add meldonium part of therapy significantly improves the quality of life of patients.

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Darowski, M., G. Ferrari, F. Clemente, M. Guaragno, and De Lazzari. "Computer Simulation of Hemodynamic Parameter Changes by Mechanical Ventilation and Biventricular Circulatory Support." Methods of Information in Medicine 39, no. 04/05 (2000): 332–38. http://dx.doi.org/10.1055/s-0038-1634451.

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Abstract:When a Bi-Ventricular Assist Device (BVAD) is used in conjunction with mechanical ventilation (MV) of the lungs with positive intrathoracic pressure (Pt), the latter influences hemodynamics. The aim of our study was to assess the simultaneous influence of BVAD and MV on hemodynamics. We assumed ventricular pathological conditions as reduced elastances and increased rest volumes. Peripheral systemic arterial resistance was assumed to have different values. Data were obtained by computer simulation. Trends in main hemodynamic variables were compared with clinical data from literature. Simulation showed that systemic venous, pulmonary arterial and left atrial pressures are very sensitive to Pt (-2 to 5 mmHg).

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Tang, Hong, Ziyin Dai, Miao Wang, et al. "Lumped-Parameter Circuit Platform for Simulating Typical Cases of Pulmonary Hypertensions from Point of Hemodynamics." Journal of Cardiovascular Translational Research 13, no. 5 (2020): 826–52. http://dx.doi.org/10.1007/s12265-020-09953-y.

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Abstract Pulmonary hypertension (PH) presents unusual hemodynamic states characterized by abnormal high blood pressure in pulmonary artery. The objective of this study is to simulate how the hemodynamics develops in typical PH cases without treatment. A lumped-parameter circuit platform of human circulation system is set up to simulate hemodynamic abnormalities of PH in different etiologies and pathogenesis. Four typical cases are considered, which are distal pulmonary artery stenosis, left ventricular diastolic dysfunction, ventricular septal defect, and mitral stenosis. The authors propose regulation laws for chambers and vessels to adapt the abnormal hemodynamic conditions for each PH case. The occurrence and development of each PH case are simulated over time using the lumped-parameter circuit platform. The blood pressure, blood flow, pressure-volume relations for chambers and vessels are numerically calculated for each case of PH progression. The model results could be a quite helpful to understand the hemodynamic mechanism of typical PHs.

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Dissertationen zum Thema "Hemodynamické parametry"

Hemzalová, Zuzana. "Evoluční algoritmy pro ultrazvukovou perfúzní analýzu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442504.

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This thesis deals with the principles of ultrasonic perfusion analysis and methods for determining perfusion parameters. It examines Evolutionary algorithms and their ability to optimize the approximation of dilution curves from ultrasond tissue scannig. It compares the optimization performance of three evolutionary algorithms. Continuous genetic algorithm GA, algorithm SOMA and PSO. Methods are evaluated on simulated and clinical data.

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Urquhart, Gayle. "Timing of hemodynamic pressure measurements and thermodilutional cardiac outputs on derived hemodynamic parameters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40155.pdf.

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Downing, Joey Micah. "Flow through a compliant stenotic artery : a parametric evaluation." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17865.

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Havlíček, Martin. "Zkoumání konektivity mozkových sítí pomocí hemodynamického modelování." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-233576.

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Zobrazení funkční magnetickou rezonancí (fMRI) využívající "blood-oxygen-level-dependent" efekt jako indikátor lokální aktivity je velmi užitečnou technikou k identifikaci oblastí mozku, které jsou aktivní během percepce, kognice, akce, ale také během klidového stavu. V poslední době také roste zájem o studium konektivity mezi těmito oblastmi, zejména v klidovém stavu. Tato práce předkládá nový a originální přístup k problému nepřímého vztahu mezi měřenou hemodynamickou odezvou a její příčinou, tj. neuronálním signálem. Zmíněný nepřímý vztah komplikuje odhad efektivní konektivity (kauzálního ovlivnění) mezi různými oblastmi mozku z dat fMRI. Novost prezentovaného přístupu spočívá v použití (zobecněné nelineární) techniky slepé dekonvoluce, což dovoluje odhad endogenních neuronálních signálů (tj. vstupů systému) z naměřených hemodynamických odezev (tj. výstupů systému). To znamená, že metoda umožňuje "data-driven" hodnocení efektivní konektivity na neuronální úrovni i v případě, že jsou měřeny pouze zašumělé hemodynamické odezvy. Řešení tohoto obtížného dekonvolučního (inverzního) problému je dosaženo za použití techniky nelineárního rekurzivního Bayesovského odhadu, který poskytuje společný odhad neznámých stavů a parametrů modelu. Práce je rozdělena do tří hlavních částí. První část navrhuje metodu k řešení výše uvedeného problému. Metoda využívá odmocninové formy nelineárního kubaturního Kalmanova filtru a kubaturního Rauch-Tung-Striebelova vyhlazovače, ovšem rozšířených pro účely řešení tzv. problému společného odhadu, který je definován jako simultánní odhad stavů a parametrů sekvenčním přístupem. Metoda je navržena především pro spojitě-diskrétní systémy a dosahuje přesného a stabilního řešení diskretizace modelu kombinací nelineárního (kubaturního) filtru s metodou lokální linearizace. Tato inverzní metoda je navíc doplněna adaptivním odhadem statistiky šumu měření a šumů procesu (tj. šumů neznámých stavů a parametrů). První část práce je zaměřena na inverzi modelu pouze jednoho časového průběhu; tj. na odhad neuronální aktivity z fMRI signálu. Druhá část generalizuje navrhovaný přístup a aplikuje jej na více časových průběhů za účelem umožnění odhadu parametrů propojení neuronálního modelu interakce; tj. odhadu efektivní konektivity. Tato metoda představuje inovační stochastické pojetí dynamického kauzálního modelování, což ji činí odlišnou od dříve představených přístupů. Druhá část se rovněž zabývá metodami Bayesovského výběru modelu a navrhuje techniku pro detekci irelevantních parametrů propojení za účelem dosažení zlepšeného odhadu parametrů. Konečně třetí část se věnuje ověření navrhovaného přístupu s využitím jak simulovaných tak empirických fMRI dat, a je významných důkazem o velmi uspokojivých výsledcích navrhovaného přístupu.

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Shi, Jun. "Constructing FHNNs to detect CVDs through hemodynamic parameters derived from sphygmogram." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493321.

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Faik, Isam. "3D characterization of the hemodynamic parameters in a stented coronary artery." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82485.

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Stenting is becoming the major interventional cardiology procedure worldwide. However restenosis remains a major limitation to the effectiveness of stents. Alterations to the local hemodynamics in the stented segment of the artery is a potential factor in the development of in-stent restenosis. The characterization of wall shear stress and of blood flow patterns in a stented artery is therefore necessary for a good understanding of the phenomenon. We have used a time-dependent 3D numerical model of a stented coronary artery to study the characteristics of the blood flow and the shear stress distribution. Our results show that the presence of the stent results in significant secondary flow. Regions of low shear stress were localized around the struts while the struts exhibited high values of shear stress. These results support the hypothesis that local hemodynamics may affect the development of in-stent restenosis and can guide the choice of stent geometries for future stent designs.

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Heyman, Patrick. "Hemodynamic parameters of patients with treated hypertension and coronary artery disease." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000701.

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Rajabi, Jaghargh Ehsan. "Effects of hemodynamic stresses on the remodeling parameters in arteriovenous fistula." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1427962400.

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Azadan, Niaz. "Den diagnostiska säkerheten i arbetsprov på kvinnor med angina pectoris : Slutversion." Thesis, Hälsohögskolan, Jönköping University, HHJ, Avd. för naturvetenskap och biomedicin, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49238.

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Angina pectoris är bröstsmärta orsakat av myokardischemi, till följd av kranskärlsjukdom med eller utan stenoser eller icke kranskärlsjukdom. Arbetsprov är den vanligaste undersökningen för angina pectoris. Diffusa symtom och angina pectoris varianter utan stenoser med låg sensitivitet för elektrokardiografi (EKG) sänker den diagnostiska säkerheten i arbetsprov på kvinnor. Litteraturstudiens syfte var att utreda om hemodynamiska parametrar och riskbedömning med Pre-test sannolikhet (PTP) samt Dukes Löpbands Index (DTS, Dukes Treadmill Score) kan öka den diagnostiska säkerheten i arbetsprov på kvinnor. Inklusionskriterierna var vetenskapligt granskade kliniska studier på engelska, med information om etiskt godkännande eller samtycke. Snowballing metoden, PUBMED, MEDLINE och CINAHL användes. Studier som inkluderades i resultatet granskades återigen och jämfördes med varandra. Hemodynamiska parametrar, PTP och DTS ökar den diagnostiska säkerheten i arbetsprov på kvinnor. Denna diagnostiska säkerhet beror dock också på PTP metod, PTP riskgrupp, etnicitet och angina pectoris variant. Vidare forskning behövs om etnicitetspecifika PTP metoder, mekanismen bakom blodtrycksreaktionen, DTS på icke kranskärlsjukdomar samt metoder som kan skilja mellan olika icke kranskärlsjukdomar. Utan studier om Systematic COronary Risk Evaluation (SCORE) och Diamond Forrester Score (DFS) samt deras påverkan på arbetsprov, kan inte resultatet i litteraturstudien generaliseras till arbetsprov i Sverige.<br>Angina pectoris is chest pain and myocardial ischemia due to Coronary Artery Disease (CAD) or Non-Coronary Artery Disease (non-CAD). Exercise stress test (EST) is the most common diagnostic procedure for angina pectoris. Non-CAD, low sensitivity for exercise electrocardiography (ex-ECG) and diffuse symptoms lower the diagnostic accuracy for females. This review’s aim was to study whether haemodynamic parameters and risk stratifications with Pre-test probability (PTP) or Duke Treadmill Score (DTS) improves the diagnostic accuracy of EST for females. Inclusion criterions were English peer reviewed, clinical studies with mentioned ethical approval or consent. Snowballing, PUBMED, MEDLINE and CINAHL were used. Articles that were included in the results, were reviewed once again, and compared to one another. Hemodynamic parameters, PTP and DTS increase the diagnostic accuracy of EST in women. This diagnostic accuracy depends on PTP method, risk group, ethnicity, and angina pectoris variant. Further research regarding ethnic specific PTP methods, mechanism behind the blood pressure reaction, DTS for diagnosis of non-CAD and methods for differentiation of subtypes of non-CAD, would be valuable. Without studies about the Systematic Coronary Risk Evaluation (SCORE), Diamond Forrester Score (DFS), and their impact on ex-ECG, the result of this review cannot be generalized to ex-ECG in Sweden.

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Audebert, Chloé. "Mathematical liver modeling : hemodynamics and function in hepatectomy." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066077/document.

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L’ablation partielle du foie est une chirurgie qui intervient dans le traitement des lésions du foie et lors d’une transplantation partielle de foie. Les relations entre l’hémodynamique du foie, son volume et ses fonctions restent à élucider pour mieux comprendre les causes des complications de ces chirurgies. Lors de la chirurgie, l’hémodynamique du foie est altérée suite à l’augmentation de la résistance au flux sanguin de l’organe. La régénération du foie semble dépendante des changements de débit et de pression dans la veine porte. D’autre part, comme le foie reçoit 25% du débit cardiaque, la chirurgie impacte la circulation sanguine globale. Dans ce contexte, le premier objectif est de mieux comprendre, grâce à des modèles mathématiques, l’influence de l’hépatectomie sur l’hémodynamique. Le second objectif est l’analyse de la perfusion et de la fonction du foie. Premièrement, la procédure chirurgicale, les conditions expérimentales ainsi que les mesures obtenues sont détaillées. Ensuite, les valeurs moyennes mesurées lors de douze chirurgies sont reproduites par un modèle de circulation entière, basé sur des équations différentielles ordinaires. Lors des différentes hépatectomies, des changements de forme de courbe sont observés. Un modèle de circulation entière, basée sur des équations 1D et 0D est proposé pour analyser ces changements. Ce travail pourrait permettre une meilleure compréhension des changements d’architecture du foie induits par l’hépatectomie. Puis, le transport dans le sang d’un composé ainsi que son traitement par le foie sont modélisés. Un modèle pharmacocinétique est développé et grâce aux mesures, les paramètres du modèle sont estimés<br>Major liver resection is being performed to treat liver lesions or for adult-to-adult living donor liver transplantation. Complications of these surgeries are related to a poor liver function. The links between liver hemodynamics, liver volume and liver function remain unclear and are important to better understand these complications. The surgery increases the resistance to blood flow in the organ, therefore it modifies liver hemodynamics. Large modifications of the portal vein hemodynamics have been associated with poor liver regeneration. Moreover the liver receives 25% of the cardiac outflow, therefore liver surgery may impact the whole blood circulation. In this context, the first goal is to investigate with mathematical models the impact of liver surgery on liver hemodynamics. The second goal is to study the liver perfusion and function with mathematical models. The first part describes the experimental conditions and reports the measurements recorded. Then, the second part focuses on the liver hemodynamics during partial hepatectomy. On one hand, the hemodynamics during several surgeries is quantitatively reproduced and explained by a closed-loop model based on ODE. On the other hand, the change of waveforms observed after different levels of liver resection is reproduced with a model of the global circulation, including 0D and 1D equations. This may contribute to a better understanding of the change of liver architecture induced by hepatectomy. Next, the transport in blood of a compound is studied. And a pharmacokinetics model and its parameter identification are developed to quantitatively analyze indocyanine green fluorescence dynamics in the liver tissue

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Bücher zum Thema "Hemodynamické parametry"

Seth, Runjan. Inotropic and lusitropic response to gbs-adrenergic stimulation, hemodynamics, and metabolic parameters in early experimental heart failure. National Library of Canada = Bibliothèque nationale du Canada, 1993.

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Torrance, Shona Margaret. The effect of varying levels of acute hypoxia on neonatal acid-base homeostasis, hemodynamic parameters, myocardial metabolism and tolerance to global ischemia. National Library of Canada = Bibliothèque nationale du Canada, 1992.

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Goldberg, Harry, Sing San Yang, Lamberto G. Bentivoglio, and Vladir Maranhao. From Cardiac Catheterization to Hymodynamic Parameters. 3rd ed. Oxford University Press, USA, 1988.

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San, Yang Sing, ed. From cardiac catheterization data to hemodynamic parameters. 3rd ed. Davis, 1988.

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Ladner, Travis R., Nishant Ganesh Kumar, Lucy He, and J. Mocco. Neuroprotection for Vascular and Endovascular Neurosurgery. Edited by David L. Reich, Stephan Mayer, and Suzan Uysal. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780190280253.003.0019.

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The complexity of neurovascular disease presents a challenge to the surgical and anesthesia teams managing patients with such conditions. With open or endovascular techniques, abrupt changes in hemodynamic status and intracranial pressure are an ever-present concern throughout the perioperative period. Monitoring of neurological status, hemodynamic parameters, and intracranial pressure are important adjuncts. Targeted physiologic and pharmacological interventions are critical to ensuring safe completion of complex procedures and the prevention secondary injury. This chapter reviews common complications of cerebrovascular and endovascular operations and their risk factors and summarize clinical principles, strategies, and considerations for maximizing neuroprotection in the treatment of neurovascular disease.

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Dvorak, Roman. The effect of a calcium channel blocker on exercise induced muscle damage and hemodynamic parameters in young, healthy adults. 1996.

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Chappell, Michael, Bradley MacIntosh, and Thomas Okell. Kinetic Modeling. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198793816.003.0004.

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The quantification of perfusion from arterial spin labeling (ASL) perfusion MRI data relies upon the principles of tracer kinetics. This chapter first outlines the simplest form of a tracer kinetic model that can be applied to ASL data, before exploring variations on this model that can be applied to extract other hemodynamic information such as arterial transit time. Finally, the chapter examines how tracer kinetic models are used with data to estimate perfusion parameters, including the use of model fitting and Bayesian inference.

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Maquet, Pierre, and Julien Fanielle. Neuroimaging in normal sleep and sleep disorders. Edited by Sudhansu Chokroverty, Luigi Ferini-Strambi, and Christopher Kennard. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199682003.003.0011.

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Functional neuroimaging techniques include methods that probe various aspects of brain function and help derive models of brain organization in health and disease. These techniques can be grouped in two categories. Some are mainly based on electromagnetic signals (electroencephalography, magnetoencephalography), recording brain activity using a large number of sensors with exquisite temporal resolution (usually of the order of a kilohertz) but allowing only indirect characterization of three-dimensional brain activity by resorting to mathematical models. The second type includes different techniques (PET scan, SPECT, MRI, optical imaging) that typically assess metabolic or hemodynamic parameters, with millimeter spatial resolution and usually from the entire brain volume. However, temporal resolution is usually low because it is primarily driven by metabolic processes that unfold in several seconds or minutes. This chapter focuses on this second type, covering the contribution of brain imaging to understanding NREM sleep and REM sleep and also sleep disorders.

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Yarlagadda, Vamsi V., and Ravi R. Thiagarajan. Cardiac Disease in Pediatric Intensive Care. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199918027.003.0007.

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This chapter on cardiac disease in pediatric intensive care provides essential information on cardiovascular physiology, how to assess cardiovascular and hemodynamic status, and principles of treatment of congenital and acquired cardiac disease in children. The review of physiology includes definitions of preload, afterload, oxygen content, cardiac output, vascular resistance, blood pressure, and cardiopulmonary interactions. Formulas to calculate key parameters are provided. The authors also summarize the presentation and care of most common cyanotic and acyanotic congenital heart defects, including treatment of low cardiac output syndrome, clinical sequelae of cardiopulmonary bypass, and the key aspects of treating pre- and postoperative patients with single-ventricle lesions (e.g., hypoplastic left heart syndrome). All three stages of single-ventricle palliation are discussed, with management summaries of children undergoing the Norwood, bidirectional Glenn, and Fontan operations. Finally, the chapter includes a discussion of the clinical presentation and management of viral myocarditis and cardiomyopathy.

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Chappell, Michael, Bradley MacIntosh, and Thomas Okell. Introduction to Perfusion Quantification using Arterial Spin Labelling. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198793816.001.0001.

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Arterial spin labeling (ASL) magnetic resonance imaging (MRI) is unique in being a completely non-invasive method for imaging perfusion in the brain. Relying upon a blood-borne tracer that is created by the MRI scanner itself, ASL is becoming a popular tool to study cerebral perfusion, as well as how this perfusion changes in response to neuronal activity or in disease. This primer provides an introduction to perfusion quantification using ASL MRI, focusing both on the methods needed to extract perfusion-weighted images and on how to quantify perfusion and other hemodynamic parameters. Starting with the simplest implementation of ASL, the primer details all the common acquisition methods, as well as the subsequent analysis steps required to quantify perfusion in an individual, detect changes in perfusion in response to neural activity or pharmacological intervention, and examine perfusion variations across groups of individuals. This is supported with examples from real data illustrating all the major steps in the analysis process, linked to online material where the reader can undertake the same analysis for themselves.

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Buchteile zum Thema "Hemodynamické parametry"

Gabriel, Edmo Atique, and Tomas Salerno. "Determining Hemodynamic Parameters." In Principles of Pulmonary Protection in Heart Surgery. Springer London, 2010. http://dx.doi.org/10.1007/978-1-84996-308-4_29.

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Payen, D. "Physiological Determinants of Hemodynamic Parameters." In Update in Intensive Care and Emergency Medicine. Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84167-5_3.

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Kuzkov, Vsevolod V. "Volumetric Parameters: A Physiological Background." In Advanced Hemodynamic Monitoring: Basics and New Horizons. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71752-0_12.

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Ishida, Fujimaro, Masanori Tsuji, Satoru Tanioka, Katsuhiro Tanaka, Shinichi Yoshimura, and Hidenori Suzuki. "Computational Fluid Dynamics for Cerebral Aneurysms in Clinical Settings." In Acta Neurochirurgica Supplement. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63453-7_4.

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AbstractHemodynamics is thought to play an important role in the pathogenesis of cerebral aneurysms and recent development of computer technology makes it possible to simulate blood flow using high-resolution 3D images within several hours. A lot of studies of computational fluid dynamics (CFD) for cerebral aneurysms were reported; therefore, application of CFD for cerebral aneurysms in clinical settings is reviewed in this article.CFD for cerebral aneurysms using a patient-specific geometry model was first reported in 2003 and it has been revealing that hemodynamics brings a certain contribution to understanding aneurysm pathology, including initiation, growth and rupture. Based on the knowledge of the state-of-the-art techniques, this review treats the decision-making process for using CFD in several clinical settings. We introduce our CFD procedure using digital imaging and communication in medicine (DICOM) datasets of 3D CT angiography or 3D rotational angiography. In addition, we review rupture status, hyperplastic remodeling of aneurysm wall, and recurrence of coiled aneurysms using the hemodynamic parameters such as wall shear stress (WSS), oscillatory shear index (OSI), aneurysmal inflow rate coefficient (AIRC), and residual flow volume (RFV).

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Maurits, Natasha. "Cerebrovascular Disease, Ultrasound, and Hemodynamical Flow Parameters." In From Neurology to Methodology and Back. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-1132-1_10.

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Mihalef, Viorel, Lucian Itu, Tommaso Mansi, and Puneet Sharma. "Lumped Parameter Whole Body Circulation Modelling." In Patient-specific Hemodynamic Computations: Application to Personalized Diagnosis of Cardiovascular Pathologies. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56853-9_5.

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Havlik, J., J. Dvorak, and V. Fabian. "Design and Realization of Hardware for Measurement of Hemodynamic Parameters." In IFMBE Proceedings. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-29305-4_373.

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Grabovskis, A., E. Kviesis-Kipge, Z. Marcinkevics, V. Lusa, K. Volceka, and M. Greve. "Reliability of Hemodynamic Parameters Measured by a Novel Photoplethysmography Device." In IFMBE Proceedings. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21683-1_50.

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Itu, Lucian, Puneet Sharma, Tiziano Passerini, Ali Kamen, and Constantin Suciu. "A Parameter Estimation Framework for Patient-Specific Assessment of Aortic Coarctation." In Patient-specific Hemodynamic Computations: Application to Personalized Diagnosis of Cardiovascular Pathologies. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56853-9_4.

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Wolański, Wojciech, Bożena Gzik-Zroska, Kamil Joszko, et al. "Impact of Vessel Mechanical Properties on Hemodynamic Parameters of Blood Flow." In Innovations in Biomedical Engineering. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-70063-2_29.

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Konferenzberichte zum Thema "Hemodynamické parametry"

Xiang, Jianping, Sabareesh K. Natarajan, Markus Tremmel, et al. "Hemodynamic Metrics Correlate With Intracranial Aneurysm Rupture Status Better Than Morphologic Metrics." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19664.

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Given the considerable risk of treating unruptured intracranial aneurysms (IAs), as well as the known severe morbidity of aneurysm rupture, elucidating those aneurysms that require prophylactic treatment can be a quandary. Traditionally, decision-making to treat an unruptured aneurysm was largely based on the Size of the aneurysm, but recent studies have failed to show significant correlation of Size with IA rupture, and a large number of ruptured aneurysms are small in Size.[1] Consequently, shape-based morphologic metrics have been explored in current investigations, and complex shapes have been correlated with rupture.[1] With the advancement of 3D angiography, and computational fluid dynamics (CFD) technology, patient-specific hemodynamics analysis has become feasible. Intra-aneurysmal hemodynamic factors, including wall shear stress (WSS), impingement regions, and oscillatory shear index (OSI), have been proposed as indicators for IA rupture risk.[2, 3] No study has rigorously examined both morphology-based and hemodynamics-based parameters from a uniform cohort to compare their relative importance. Our aim, therefore, was to identify significant morphologic and hemodynamic parameters that correlate with an aneurysm’s rupture status and examine whether hemodynamic parameters can separate ruptured and unruptured aneurysms better than morphologic parameters.

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Almeida, Vania G., Luis F. Requicha Ferreira, and Carlos Correia. "Hemodynamic parameters assessment." In 2012 IEEE 2nd Portuguese Meeting in Bioengineering (ENBENG). IEEE, 2012. http://dx.doi.org/10.1109/enbeng.2012.6331379.

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Prince, Chekema, Mingyao Gu, and Sean D. Peterson. "Flow in the Vascular System Post Stent Implantation: Examining the Near-Stent Flow Physics." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80045.

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As a simplified stent model, fully-developed flow of an incompressible, Newtonian fluid through a curved tube with axially aligned wall protuberances is investigated to define the impact of stent implantation on hemodynamic behavior in curved vessels. According to previous research local hemodynamics tends to trigger biochemical pathways that result in the inception and progression of in-stent restenosis (ISR) and ultimately lead to stent failure. In this manuscript, we focus on hemodynamic changes due to stent strut protrusion into the vessel lumen as a facilitator of ISR. We investigate a range of physiologically relevant stent strut heights and flow parameters using computational fluid dynamics (CFD).

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Havlík, Jan, Vratislav Fabián, David Macků, Lenka Lhotská, Jan Dvořák, and Lucie Kučerová. "Measurement of hemodynamic parameters." In the 4th International Symposium. ACM Press, 2011. http://dx.doi.org/10.1145/2093698.2093740.

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Xiang, Jianping, Nicole Varble, Adnan Siddiqui, Luca Antiga, and Hui Meng. "AView: A Clinical Tool for Hemodynamic and Morphological Analysis of Intracranial Aneurysms." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14770.

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Neurointerventionists are routinely faced with the dilemma whether or not to treat unruptured intracranial aneurysms. Hemodynamic and morphological characteristics have become important considerations for aneurysm rupture-risk assessment [1]. Clinicians require an integrated tool that analyzes these parameters to help make treatment decisions in clinical workflow, however such a tool does not exist. To this end, Toshiba Stroke and Vascular Research Center (TSVRC) at University at Buffalo and Orobix Srl (Italy) have developed a prototype of a computational workflow system. Termed AView, it is an integrated, image-based vascular analysis tool for rapid assessment of aneurysmal hemodynamics, morphometrics, rupture risk assessment, and treatment planning.

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Gundert, Timothy J., Paul Hayden, Raymond Q. Migrino, and John F. LaDisa. "Visualization of CFD Results in a Virtual Reality Environment." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-205067.

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Imaging modalities such as computed tomography, 3D ultrasound and magnetic resonance imaging (MRI) facilitate detailed viewing of vascular geometries [1], but lack the ability to directly measure important hemodynamic parameters associated with the onset and progression of cardiovascular disease (i.e. pressure, wall shear stress) [2]. Computational fluid dynamics (CFD) is a noninvasive tool to quantify these indices in vessels reconstructed from imaging data. Although image-based CFD can be used to relate altered hemodynamics to vascular disease, a disjunction exists between information gathered from 4-D CFD (3 spatial dimensions and time) and the 2-D screens where results are typically displayed. In contrast, 3D virtual reality environments can be used to visualize CFD results in a comprehensive manner.

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Vaz, Pedro G., Anne Humeau-Heurtier, Edite Figueiras, and João Cardoso. "Laser based sensors for hemodynamic parameters measurement." In Optical Sensors. OSA, 2017. http://dx.doi.org/10.1364/sensors.2017.sem3e.3.

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Khiabani, Reza H., Sulisay Phonekeo, Harish Srinimukesh, Elaine Tang, Mark Fogel, and Ajit P. Yoganathan. "Effect of Flow Pulsatility and Wall Compliance on the Energy Loss in the Total Cavopulmonary Connection." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14811.

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Single Ventricle Heart Defects (SVHD) are present in 2 per 1000 live births in the US. SVHD are characterized by cyanotic mixing between the de-oxygenated blood from the systemic circulation return and the oxygenated blood from the pulmonary arteries. In the current practice, surgical interventions on SVHD patients commonly result in the total cavopulmonary connection (TCPC) [1]. In this configuration the systemic venous returns (inferior vena cava, IVC, and superior vena cava, SVC) are directly routed to the right and left pulmonary arteries (RPA and LPA), bypassing the right heart. The resulting anatomy has complex and unsteady hemodynamics characterized by flow mixing and flow separation. Pulsation of the inlet venous flow during a cardiac cycle and wall motion may result in complex and unsteady flow patterns in the TCPC. Although vessel wall motion and different degrees of pulsatility have been observed in vivo, non-pulsatile (time-averaged) flow boundary conditions and rigid walls have traditionally been assumed in estimating the TCPC hemodynamic parameters (such as energy loss). Recent studies have shown that these assumptions may result in significant inaccuracies in modeling TCPC hemodynamics [2, 3].

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Bernad, Sandor I., and Elena S. Bernad. "Coronary Venous Bypass Graft Failure, Hemodynamic Parameters Investigation." In Biomedical Engineering. ACTAPRESS, 2012. http://dx.doi.org/10.2316/p.2012.764-161.

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Griofa, Marc O., Rebecca Blue, Robert Friedman, et al. "Radio Frequency Impedance Interrogation monitoring of hemodynamic parameters." In 2011 Biomedical Sciences and Engineering Conference (BSEC). IEEE, 2011. http://dx.doi.org/10.1109/bsec.2011.5872326.

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