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Artigos de revistas sobre o tema "Electrocardiography"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 29 de julho de 2024

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1

Brooks, Carol Ann, Nancy Kanyok, Colin O’Rourke e Nancy M. Albert. "Retention of Baseline Electrocardiographic Knowledge After a Blended-Learning Course". American Journal of Critical Care 25, n.º 1 (1 de janeiro de 2016): 61–67. http://dx.doi.org/10.4037/ajcc2016556.

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Background Among nurses, skill retention after an electrocardiography blended-learning course is unknown. Objectives To compare 3- and 8-week electrocardiography test scores, compare scores by nurse and work characteristics and self-assessed electrocardiographic competence, and compare 1-year work retention with 3- and 8-week scores and change in scores from week 3 to week 8. Methods Data were collected on demographics, comfort with electrocardiography expectations, electrocardiography competence levels, and 1-year work retention. Correlational and comparative statistics were used in analyses. Results Of 69 nurses, 58% were somewhat comfortable with interventions for abnormal rhythms. Test scores were higher at 3 weeks than at 8 weeks: mean difference, 26%; P < .001. Scores at 8 weeks reflected intermediate skill retention and were not associated with nurse characteristics, electrocardiography background, comfort with rhythms and measurements, or 1-year work retention. Nurses with greater comfort for intervening when rhythm abnormalities occurred had higher median 8-week scores (P = .01) than did nurses with less comfort, and perceptions of electrocardiographic competence were associated with 8-week scores (r = 0.28; P = .02). Reduction in scores at 8 weeks was less severe in nurses with greater comfort at 3 weeks in measuring electrocardiographic intervals (P = .008) and applying therapeutic interventions (P = .009). Conclusions Skill retention and competence in electrocardiographic interpretation were intermediate and correlated with baseline self-assessment. Electrocardiographic interpretation, measurement, and interventions should be reinforced at the bedside.

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Artsymovych, Agar, Olena Oshlianska, Olena Okhotnikova, Zoia Rossokha, Olena Popova, Nataliia Medvedeva, Victoriia Vershigora, Illya Chaikovsky e Olga Kryvova. "Possibilities of using determination of allelic polymorphism of interleukin-6 G174C and tumour necrosis factor-α G308A genes for the prediction of cardiovascular disorders in children with juvenile idiopathic arthritis". Pediatria i Medycyna Rodzinna 18, n.º 1 (31 de maio de 2022): 58–69. http://dx.doi.org/10.15557/pimr.2022.0008.

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Objectives: Juvenile idiopathic arthritis is a chronic disease that affects the synovial membrane of the joints, but can also lead to secondary lesions of the cardiovascular system. The most important mechanism of myocardial damage is associated with the effect of proinflammatory cytokines. The aim of the study was to propose a method of early detection of cardiovascular system changes and lesions in patients with juvenile idiopathic arthritis based on the determination of allelic polymorphism combined with electrocardiography data. Materials and methods: 102 patients with juvenile idiopathic arthritis underwent a general clinical examination. The overall activity of juvenile idiopathic arthritis was assessed using the Juvenile Arthritis Disease Activity Score. In addition, the patients underwent an electrocardiographic evaluation using the software and hardware complex “Cardioplus P,” which is a portable electrocardiograph providing “signal-averaged” electrocardiography performing the recognition and measurement of amplitude-time parameters, and calculation of secondary electrocardiography parameters. The genotypes of patients were additionally determined by alleles of the TNF-α (G308A) and IL6 (G174C) genes by polymerase chain reaction. Results: The overall number of mutations affects the course of the disease, with two or more mutations being associated with a more aggressive course of the disease, a more pronounced degree of inflammation, and a higher frequency of extra-articular lesions. The complex indicator of the functional state of the myocardium according to the electrocardiography data differed significantly (p = 0.00001) in clusters. Conclusion: Patients with juvenile idiopathic arthritis with two or more mutations in different genes of proinflammatory cytokines have a higher activity of the inflammatory process and a higher frequency of cardiovascular changes according to 4th generation electrocardiography. The determination of polymorphism may be useful in evaluating the risk of development of cardiovascular system abnormalities.

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Iacobescu, Radu-Alexandru, Luiza-Elena Corneanu, Alina-Mihaela Dimache, Bogdan-Danut Florescu e Adorata-Elena Coman. "Role of nurses' electrocardiography competency in emergent situations". Romanian Journal of Medical Practice 18, n.º 3 (30 de setembro de 2023): 125–29. http://dx.doi.org/10.37897/rjmp.2023.3.5.

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Electrocardiography is an essential tool in emergency care and monitoring of patients with severe cardiovascular diseases. Nurses are at the center of this evaluation and play an important role in the outcome of therapy. Data shows that nurses are limited in their ability to record and interpret electrocardiography diagrams accurately. Little is known about the role nurses play in electrocardiographic evaluation in an emergency. This narrative literature review assesses the competency of nurses in electrocardiography in an emergency, the implications for medical practice, and tries to identify possible improvement solutions.

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Altalhi, Hanan G. K., e Asgad A. Abdalgbar. "Accuracy of the Electrocardiogram in Identifying Chronic Heart Failure due to Left Ventricular Systolic Dysfunction". Al-Mukhtar Journal of Sciences 28, n.º 1 (30 de junho de 2013): 39–45. http://dx.doi.org/10.54172/mjsc.v28i1.143.

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There is a common assumption that a normal electrocardiography rules out chronic heart failure due to left ventricular systolic dysfunction (LVSD). In this research work, an assessment of the value of electrocardiography in identifying patients with chronic heart failure due to LVSD was investigated. Patients admitted to Al-Bayda central hospital with suspicion of heart failure for clinical assessment and electrocardiography, echocardiography; the accuracy of each screening tests were calculated for left ventricular systolic dysfunction and heart failure. A total of 120 patients' aged between 36-100 years was assessed; 22 patients had impaired left ventricular systolic function, among them 21 patients had major electrocardiography abnormalities (Left bundle branch block, pathological Q wave, Left ventricular hypertrophy, poor R wave prog-ression, Ischemic ST-T changes, Left anterior fascicular block, IV conduction defect). Out of 98 patients with normal left ventricular systolic function, 38 had major electrocardiography abnormalities. In conclusion, the study showed that left ventricular systolic dysfunction is un likely to be present if the electrocardiography is normal (or shows only minor abnormalities); conversely, there is usually a major electrocardiographic abnormality in the presence of left ventricular systolic dysfunction.

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Sendelbach, Sue, Sharon Wahl, Anita Anthony e Pam Shotts. "Stop the Noise: A Quality Improvement Project to Decrease Electrocardiographic Nuisance Alarms". Critical Care Nurse 35, n.º 4 (1 de agosto de 2015): 15–22. http://dx.doi.org/10.4037/ccn2015858.

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BACKGROUNDAs many as 99% of alarm signals may not need any intervention and can result in patients’ deaths. Alarm management is now a Joint Commission National Patient Safety Goal.OBJECTIVESTo reduce the number of nuisance electrocardiographic alarm signals in adult patients on the medical cardiovascular care unit.METHODSA quality improvement process was used that included eliminating duplicative alarms, customizing alarms, changing electrocardiography electrodes daily, standardizing skin preparation, and using disposable electrocardiography leads.RESULTSIn the cardiovascular care unit, the mean number of electrocardiographic alarm signals per day decreased from 28.5 (baseline) to 3.29, an 88.5% reduction.CONCLUSIONUse of a bundled approach to managing alarm signals decreased the mean number of alarm signals in a cardiovascular care unit. (Critical Care Nurse. 2015;35[4]:15–23)

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Cicogna, Maria, Piero Boni, Tommaso Frigo e Domenico Caivano. "Base-apex electrocardiographic examination in healthy cows of Chianina breed". Open Veterinary Journal 12, n.º 6 (2022): 951. http://dx.doi.org/10.5455/ovj.2022.v12.i6.22.

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Background: The electrocardiography is a useful diagnostic tool for the characterization of the cardiac rhythm in veterinary medicine. In cattle, standard electrocardiographic exam is commonly performed using the base-apex lead system and reference values for ECG parameters have been reported for different breed of cows. However, no electrocardiographic studies have been conducted in Chianina breed. Aim: To determine the feasibility and normal values for standard base-apex electrocardiography in clinically healthy Chianina cows. Methods: A standard base-apex electrocardiographic examination was acquired in 45 Chianina cows. All the cows were considered healthy based on history and physical examination. The following ECG parameters were evaluated: heart rate; morphology of P wave, QRS complex and T wave; amplitude and duration of P wave, QRS complex, and T wave; duration of PR and QT intervals. Correlations between ECG parameters and clinical variables were analyzed. Results: Morphology of the electrocardiographic waves/complexes and values for all ECG parameters recorded in the 45 clinically healthy Chianina cows were reported. Correlations between heart rate and body weight, QT interval and body weight, QT interval and heart rate, P wave amplitude and heart rate, PR interval and heart rate, R wave amplitude and age were observed. Statistical difference between heart rate in pregnant and not-pregnant cows was also found. Conclusion: Base-apex electrocardiogram is suitable for monitoring heart rhythm in clinically healthy Chianina cows and reference values for main electrocardiographic parameters have been reported for this breed. This study can be a useful contribution to the literature, updating current knowledge on the electrocardiography in cattle.

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Batra, Mahesh Kumar, Atif Khan, Fawad Farooq, Tariq Masood e Musa Karim. "Assessment of electrocardiographic criteria of left atrial enlargement". Asian Cardiovascular and Thoracic Annals 26, n.º 4 (27 de março de 2018): 273–76. http://dx.doi.org/10.1177/0218492318768131.

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Background Left atrial enlargement is considered to be a robust, strong, and widely acceptable indicator of cardiovascular outcomes. Echocardiography is the gold standard for measurement of left atrial size, but electrocardiography can be simple, cost-effective, and noninvasive in clinical practice. This study was undertaken to assess the diagnostic accuracy of an established electrocardiographic criterion for left atrial enlargement, taking 2-dimensional echocardiography as the gold-standard technique. Methods A cross-sectional study was conducted on 146 consecutively selected patients with the complaints of dyspnea and palpitation and with a murmur detected on clinical examination, from September 10, 2016 to February 10, 2017. Electrocardiography and echocardiography were performed in all patients. Patients with a negative P wave terminal force in lead V1 > 40 ms·mm on electrocardiography or left atrial dimension > 40 mm on echocardiography were classified as having left atrial enlargement. Sensitivity and specificity were calculated to assess the diagnostic accuracy. Results Taking 2-dimensional echocardiography as the gold-standard technique, electrocardiography correctly diagnosed 68 patients as positive for left atrial enlargement and 12 as negative. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of electrocardiography for left atrial enlargement were 54.4%, 57.1%, 88.3%, 17.4%, and 54.8%, respectively. Conclusion The electrocardiogram appears to be a reasonable indicator of left atrial enlargement. In case of nonavailability of echocardiography, electrocardiography can be used for diagnosis of left atrial enlargement.

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Dhodary, Shyam, Surendra Uranw, Naveen Kumar Pandey e Prahlad Karki. "Comparative Study of Electrocardiographic and Echocardiographic Evidence of Left Ventricular Hypertrophy in Systemic Hypertension". Journal of Advances in Internal Medicine 10, n.º 2 (31 de dezembro de 2021): 71–75. http://dx.doi.org/10.3126/jaim.v10i2.40289.

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Background and Aims: Hypertension is a common health problem. Left ventricular hypertrophy, a condition in hypertension is a risk factor for myocardial infarction, stroke and heart failure. This study aims to detect left ventricular hypertrophy in hypertensive patients using Electrocardiography and echocardiography. Methods: In this descriptive cross-sectional study; 143 patients of Hypertension from February 2019 to August 2019 were enrolled. They were evaluated for left ventricular hypertrophy using electrocardiography and echocardiography. Sokolow-Lyon and Cornell Voltage electrocardiographic criteria were used and their sensitivities and specificities to detect left ventricular hypertrophy were calculated taking echocardiography as a gold standard method. Results: The mean age of the study population was 58.69 ± 11.33 years. Mean duration of hypertension was 4.72 ±3.2 years. The mean systolic and diastolic blood pressure were 137 ± 15.42 mmHg and 84 ± 10.5 mmHg respectively. Out of 143 study population, 30(21%) of them had left ventricular hypertrophy on electrocardiography as defined by Sokolow-Lyon criteria, and 29(20.3%) had left ventricular hypertrophy on electrocardiography as per Cornell Voltage criteria. On combining both Sokolow-Lyon and Cornell Voltage criteria, 37(25.9%) of the study population had left ventricular hypertrophy on electrocardiography (either as per Sokolow-Lyon or Cornell Voltage criteria). On echocardiography, 62(43.4%) of them were found to have left ventricular hypertrophy. Conclusions: Electrocardiography is a less sensitive tool to diagnose Left Ventricular Hypertrophy in hypertension but its specificity is high (>95%). Investigation of choice to detect Left Ventricular Hypertrophy in hypertensive people is still the echocardiography.

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SR, Mittal. "Ectopic Supraventricular Rhythms during Exercise Electrocardiography". Open Access Journal of Cardiology 7, n.º 1 (2023): 1–5. http://dx.doi.org/10.23880/oajc-16000190.

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Three cases of the new appearance of ectopic supraventricular rhythms during exercise electrocardiography are presented. Transient decrease in the rate of the sinoatrial node or transient increase in the rate of subsidiary pacemaker are responsible. Electrocardiographic criteria for diagnosing the site of origin of supraventricular ectopic foci are discussed. The diagnostic, and prognostic significance of such a finding is not known.

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Druyan, L. I., A. L. Kalinin e N. B. Krivelevich. "PROPEDEUTICS ASPECTS OF UNDERSTANDING OF ATRIOVENTRICULAR CONDUCTION AND ITS ELECTROCARDIOGRAPHIC REFLECTION". Health and Ecology Issues, n.º 1 (28 de março de 2016): 7–13. http://dx.doi.org/10.51523/2708-6011.2016-13-1-2.

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The work offers two variants of explanation and understanding of atrioventricular conduction while teaching students how to interpret electrocardiography and considers the electrocardiographic reflection of the transmission of the excitation impulse throughout the cardiac conduction system and the myocardium.

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Jesús Bermejo Valdés, Alejandro. "Analysing Wilson’s and Goldberger’s Central Terminals: Theoretical Redesign of a Novel Central Terminal for Precordial Leads". Clinical Cardiology and Cardiovascular Interventions 7, n.º 5 (31 de maio de 2023): 01–07. http://dx.doi.org/10.31579/2641-0419/370.

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This study delves into the foundational aspects of electrocardiographic (ECG) lead systems, specifically focusing on Einthoven’s Triangle and Wilson’s Central Terminal. We introduce the innovative concept of a Precordial Central Terminal, a strategic arrangement of thoracic electrodes that establishes two Einthoven’s triangles within the horizontal plane, in accordance with physical-mathematical principles. Furthermore, we meticulously scrutinize Goldberger’s contributions to the field of ECG, particularly augmented leads, which shed light on the development of our theory. Additionally, we propose the implementation of a novel standardized electrocardiograph, characterized by its use of exclusively “precordial” electrodes, yet capable of providing a comprehensive three-dimensional perspective of cardiac electrical activity. By amalgamating theoretical underpinnings with empirical experimentation, our study lays the groundwork for future investigations, including the experimental validation of our innovative Precordial Terminal. This validation holds the promise of yielding substantial advancements in the realm of clinical electrocardiography.

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Sudhakara Reddy, Bhavanam, e Sirigireddy Sivajothi. "Electrocardiography markers in hypocalcaemia of peripartum buffaloes". Buffalo Bulletin 43, n.º 1 (1 de abril de 2024): 51–54. http://dx.doi.org/10.56825/bufbu.2024.4313261.

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The present report was done on 42 buffaloes which were identified with hypocalcemia. Confirmation of the hypocalcemia was done by serum calcium levels estimation. Electrocardiographic assessment was carried out with base apex lead system and recorded the prolonged QT and QTc interval. Based on present study, electrocardiography can be utilized for assessment of the buffaloes with hypocalcemia diagnostic as well as therapeutic response.

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van Oosterom, A. "The Role of Computer Modeling in Electrocardiography". Methods of Information in Medicine 29, n.º 04 (1990): 282–88. http://dx.doi.org/10.1055/s-0038-1634809.

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AbstractThis paper introduces some levels at which the computer has been incorporated in the research into the basis of electrocardiography. The emphasis lies on the modeling of the heart as an electrical current generator and of the properties of the body as a volume conductor, both playing a major role in the shaping of the electrocardiographic waveforms recorded at the body surface. It is claimed that the Forward-Problem of electrocardiography is no longer a problem. Several source models of cardiac electrical activity are considered, one of which can be directly interpreted in terms of the underlying electrophysiology (the depolarization sequence of the ventricles). The importance of using tailored rather than textbook geometry in inverse procedures is stressed.

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Kats, Bernard A. "Electrocardiographic Interpretation: A Self-Study Approach to Electrocardiography". JAMA: The Journal of the American Medical Association 267, n.º 2 (8 de janeiro de 1992): 301. http://dx.doi.org/10.1001/jama.1992.03480020111048.

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Loukrakpam, Bidyarani, Laishram Geetanjali, O. Puinabati Luikham e Sanjoy K. Shylla. "Electrocardiographic changes in patients with pre-eclampsia". Annals of Medical Physiology 3, n.º 1 (22 de março de 2019): 10–13. http://dx.doi.org/10.23921/amp.2019v3i1.26774.

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Pre-eclampsia is a hypertensive disorder of pregnancy that is associated with elevated maternal risk for cardiovascular disease. Electrocardiographic (ECG) changes in pre-eclampsia have been documented in some studies. Electrocardiography has recently emerged as a useful tool to evaluate cardiovascular complication during and after pregnancy. The present study was therefore undertaken to find out electrocardiographic changes in pre-eclamptic women, visiting Regional Institute of Medical Sciences, Manipur. The aim of this study was to determine the electrocardiographic changes in both pre-eclampsia and age matched normotensive pregnant women. In this study, 25 pregnant women (gestational age >20 weeks) with pre-eclampsia in the range of 18 to 45 years of age were recruited and compared with the equal number of age matched normotensive pregnant women. ECG parameters of pre-eclamptic women were compared with those of normotensive pregnant women. The data were then analyzed using SPSS software. Pre-eclamptic women showed significantly longer QRS (0.10±0.02 sec vs 0.09±0.05 sec), prolonged QT (0.401±0.03 sec vs 0.365±0.003sec) and QTc (457.73±37 msec vs 416.47± 25.4 msec) than control group. The study shows that electrocardiography can be used to evaluate cardiovascular risk in pre-eclamptic women.

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Rahmat, Defni, Firdaus e Gustina Indriati. "Prototipe Alat Pendeteksi Kelainan Kelenjar Tiroid Dengan Menggabungkan Teknik Iridologi Dan Elektrokardiografi Berbasis Jaringan Saraf Tiruan". Jurnal Ilmiah Poli Rekayasa 11, n.º 1 (15 de outubro de 2015): 48. http://dx.doi.org/10.30630/jipr.11.1.18.

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Some of the external symptoms of hyperthyroidism may be experienced by people who are not suffering from hyperthyroid disease, therefore needs a thorough examination and diagnosis for patients with hyperthyroidism that drug delivery and targeted therapy. A thorough examination of this costly and quite a long time. This research make a prototype instrumentation to help detect the presence of symptoms of thyroid gland disorders, especially hyperthyroidism, do not use chemicals and does not hurt the patient. The principle of this tool is to combine technology with electrocardiographic Iridology specifically based artificial neural network. In the first year is the design and realization of a prototype of the channel electrocardiograph-based personal computer for measurement of cardiac patients megalami signal abnormalities tachycardia (one of the symptoms of hyperthyroidism). Electrocardiography will measure and display signal to monitor a patient's heart, can store data and make a decision whether the patients had tachycardia heart rhythm disorder or not. In both make iridology devices based neural network to detect any abnormalities of the thyroid gland through the iris image. Electrocardiography device coupled with iridology software in order to get a prototype for the detection of hyperthyroidism through the measurement of two variables: cardiac signal and image of the iris. The Merger is software into a single entity has not done separately but have been able to perform measurements on patients. Tests have been conducted on 8 (eight) patients and has not been accompanied by a doctor, the conclusion of the test is that all patients tested did not experience hyperthyroidism.

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Hjelm, N. M., e H. W. Julius. "Centenary of tele-electrocardiography and telephonocardiography". Journal of Telemedicine and Telecare 11, n.º 7 (1 de outubro de 2005): 336–38. http://dx.doi.org/10.1258/135763305774472088.

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In the history of electrocardiography the names of two physiologists stand out: Augustus Waller (1865–1922) and Willem Einthoven (1860–1927). Waller was the first to show that the beating heart produces a weak electric potential, which can be registered by a measuring device connected to electrodes attached to the skin. Einthoven developed a 'string' galvanometer, which was much faster and more sensitive than the system used by Waller. Einthoven's electrocardiograph was ready for use in 1903. To facilitate investigations of patients Einthoven connected his instrument to the Academic Hospital in Leyden, by a telephone line, as suggested by his engineering colleague Johannes Bosscha in Delft. The first successful tele-electrocardiogram was transmitted on Sunday 22 March 1905. The heart tones were registered by wiring a specially developed microphone placed on the subject's chest to another string galvanometer. The event was therefore a first both for tele-electrocardiography and for telephonocardiography. We are still awaiting the full-scale implementation of these achievements, 100 years later.

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Kang, S. L., C. Jackson e W. Kelsall. "Electrocardiogram screening of deaf children for long QT syndrome: are we following UK national guidelines?" Journal of Laryngology & Otology 125, n.º 4 (17 de novembro de 2010): 354–56. http://dx.doi.org/10.1017/s0022215110002379.

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AbstractIntroduction:Jervell–Lange-Nielsen syndrome is characterised by congenital deafness and a long QT interval on electrocardiography.Aim:(1) To survey UK national practice regarding electrocardiography screening of deaf children referred to cochlear implant centres, performed to evaluate for prolonged QT interval as recommended by national guidelines, and (2) to review local practice.Methods:Data were collected via a questionnaire sent to all UK cochlear implant centres, and via review of the medical records of a local cochlear implant centre database.Results:Eight (42 per cent) of the 19 cochlear implant centres surveyed performed electrocardiographic screening. Thirteen cases of long QT syndrome were reported in seven centres, with two related deaths. In our local cochlear implant centre, 14 (7.1 per cent) of 193 children had abnormal electrocardiograms; one definite long QT syndrome case and 13 borderline cases were identified.Conclusion:Despite clear national guidelines for electrocardiographic screening of deaf children, there is wide variation in practice. Our local practice of performing investigations, including electrocardiography, during magnetic resonance imaging sedation has been very successful. Electrocardiograms should be reviewed by trained clinicians, and corrected QT intervals should be calculated manually.

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Popadiuk, B., e S. Holopura. "Validation of a portable ECG monitor for the diagnosis of arrhythmias in horses compared to a standard electrocardiograph". Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 22, n.º 97 (7 de maio de 2020): 20–25. http://dx.doi.org/10.32718/nvlvet9704.

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Electrocardiography (ECG) is a main diagnostic tool for diagnostics of rhythm disturbances. Since most pathological arrhythmias are only visible during movement and exercises the registration of exercising ECG becomes a mandatory diagnostic tool for monitoring of high-performance horses. Portable ECG monitor, developed together with specialists of National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” is an electrocardiograph with telemetric data transmission system and four electrodes providing six-lead real-time ECG recordings at rest and during exercise. The objective of current study was validation of portable ECG monitor for diagnostics of arrhythmias in horses compared to a standard electrocardiograph. With this aim the ECG was performed by both devices simultaneously on animals with normal rhythm and rhythm disturbances. The ECG traces were therefore analyzed and compared. 14 horses of Ukrainian riding, Friesian, and Arabian breeds were divided in two groups: experimental one with arrhythmias, and control one with normal rhythm. ECG was performed by both devices simultaneously during rest, exercise, and post-exercise period. Electrocardiographic parameters were measured manually using on-screen calipers. Obtained data was analyzed using GraphPad Prism software by linear regression method for continuous parameters (HR, duration of QRS complex, PR, and QT intervals, and amplitude of P and S waves). For nominal parameters (rhythm, excitability, and conduction disorders) the analysis of sensitivity and specificity was performed. A total of 196 ECG records were analysed. Electrocardiographic intervals had high correlation: for HR and PR interval the correlation coefficient amounted to 0.98, for QRS complex and QT interval – to 0.97, for P and S waves – to 0.96. Among detected rhythm disturbances were physiological (second degree AV block first Mobitz type and SA block) and pathological arrhythmias (SVT and SVPCs). The sensitivity and specificity for rhythm, excitability, and conduction disorders of the portable ECG monitor compared to a standard electrocardiograph was 100 %. The portable ECG monitor allows to easily perform ECG registration during rest and exercises and to detect arrhythmias and other ECG abnormalities with accuracy, compared to a standard electrocardiograph.

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McCloskey, Gerard F., e Patrick E. Curling. "Electrocardiography". Anesthesiology Clinics of North America 6, n.º 4 (dezembro de 1988): 903–15. http://dx.doi.org/10.1016/s0889-8537(21)00252-2.

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Ambrose, Kate. "Electrocardiography". Emergency Nurse 13, n.º 4 (julho de 2005): 6. http://dx.doi.org/10.7748/en.13.4.6.s11.

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Henderson, Nigel. "Electrocardiography". Nursing Standard 11, n.º 44 (21 de julho de 1997): 45–56. http://dx.doi.org/10.7748/ns.11.44.45.s51.

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Rowlands, D. "Electrocardiography". Current Opinion in Cardiology 2, n.º 1 (janeiro de 1987): 33–38. http://dx.doi.org/10.1097/00001573-198701010-00007.

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Stewart, J. T., e A. J. Camm. "Electrocardiography". Current Opinion in Cardiology 3, n.º 1 (janeiro de 1988): 9–14. http://dx.doi.org/10.1097/00001573-198801000-00003.

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WELLENS, HEIN J. J. "Electrocardiography." Annals of the New York Academy of Sciences 601, n.º 1 Electrocardio (setembro de 1990): 305–11. http://dx.doi.org/10.1111/j.1749-6632.1990.tb37309.x.

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John, A. D., e Lee Fleisher. "Electrocardiography". International Anesthesiology Clinics 42, n.º 1 (2004): 1–12. http://dx.doi.org/10.1097/00004311-200404210-00003.

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Brush, Linnea C. "Electrocardiography". Journal of Clinical Engineering 16, n.º 5 (setembro de 1991): 441. http://dx.doi.org/10.1097/00004669-199109000-00016.

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Fregin, G. Frederick. "Electrocardiography". Veterinary Clinics of North America: Equine Practice 1, n.º 2 (agosto de 1985): 419–32. http://dx.doi.org/10.1016/s0749-0739(17)30763-0.

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Henderson, Nigel. "Electrocardiography". Emergency Nurse 5, n.º 6 (1 de outubro de 1997): 31–39. http://dx.doi.org/10.7748/en.5.6.31.s21.

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Syvoraksha, O. O., I. A. Chaikovskyi, Ya A. Antoniuk, D. O. Dziuba, O. A. Kryvova e O. A. Loskutov. "Assessment of myocardium impairment in coronary stenting according to the results of the analysis of electrocardiogram changes and heart rate variability". EMERGENCY MEDICINE 17, n.º 2 (24 de maio de 2021): 87–94. http://dx.doi.org/10.22141/2224-0586.17.2.2021.230654.

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Background. With every passing year, the morta-lity from cardiovascular diseases is increasing. One of the treatment methods is X-ray endovascular plasty and coronary sten-ting. However, the X-ray endovascular plasty by itself inevitably causes at least minimal impairment of coronary vessels and myocardium. The study aimed at the assessment of small electrocardiography changes using an original method of scaling immediately after the procedure of coronary stenting. Materials and methods. The study was performed in 2020 based on ES “Institute of Heart of MH of Ukraine”. Twenty-three patients were examined before coronary stenting. This investigation included pair measurements, particularly electrocardiography registration within 3 min before and after (in several hours) the surgical intervention. The examination was performed using hardware-software complex “Cardio+P”. Total of 23 pairs of electrocardiograms were analyzed. Two hundred and forty primary and measurement parameters of electrocardiography were analyzed in each electrocardiogram. Results. The results of electrocardiographic investigation allowed determining a subgroup with significant myocardium impairments. This subgroup included the patients elder compared to the rest patients. In this subgroup, the average number of stents was higher and the patients demonstrated worsened index of the psychoemotional condition along with the electrocardiogram changes.

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Goodacre, S. "ABC of clinical electrocardiography: Paediatric electrocardiography". BMJ 324, n.º 7350 (8 de junho de 2002): 1382–85. http://dx.doi.org/10.1136/bmj.324.7350.1382.

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Pearce, Arron. "Examining the causes and effects of electrode misplacement during electrocardiography: a literature review". British Journal of Cardiac Nursing 14, n.º 7 (2 de julho de 2019): 1–15. http://dx.doi.org/10.12968/bjca.2019.0010.

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Background/AimsElectrode misplacement appears to be a common finding during 12-lead electrocardiography and there are numerous potential causes and effects. This article aims to identify the frequency of electrode misplacement during electrocardiography, examine the effect this may have on patient safety and review the causes of misplacement.MethodsA systematic literature review of current primary research was conducted across three electronic healthcare databases using the EBSCOhost platform.FindingsElectrode misplacement is a very common finding, particularly in acute healthcare areas. There are many causes, some intentional but most are unintentional in nature. Electrode misplacement affects the electrocardiograph morphology substantially, having the potential to alter the diagnosis that could lead to unnecessary patient harm.Conclusion:It is of great importance for electrocardiograms to be recorded accurately and correctly to preserve patient safety. This could be achieved through structured training facilitated by nurse specialists.

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Seifert, Patricia C. "Electrocardiographic Interpretation: A Self-Study Approach to Clinical Electrocardiography". AORN Journal 56, n.º 3 (setembro de 1992): 559. http://dx.doi.org/10.1016/s0001-2092(07)70206-5.

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Muller, Reid T. "ELECTROCARDIOGRAPHIC INTERPRETATION, A SELF STUDY APPROACH TO CLINICAL ELECTROCARDIOGRAPHY". Military Medicine 158, n.º 3 (1 de março de 1993): A11. http://dx.doi.org/10.1093/milmed/158.3.a11a.

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Botelho, Ana F. M., Maira S. de Oliveira, Benito Soto-Blanco e Marília M. Melo. "Computerized electrocardiography in healthy conscious guinea pigs (Cavia porcellus)". Pesquisa Veterinária Brasileira 36, n.º 12 (dezembro de 2016): 1203–8. http://dx.doi.org/10.1590/s0100-736x2016001200011.

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ABSTRACT: The purpose of this study is to evaluate healthy conscious guinea pigs as a model for electrophysiology assessment and to describe normal electrocardiographic patterns in controlled laboratory environment, establishing the best QT formula for this method. Electrocardiographic recordings of fifty adult conscious guinea pigs were obtained using a computerized electrocardiography. The electrocardiographic measurements of three different tracings were analyzed. The results obtained established normal mean and range values for the parameters: heart rate, waves and intervals of P-QRS-T deflections, as well as the mean cardiac axis. Groups were separated by body weight: group 1 gathered animals with 500-699g and group 2 with animals 700-900g. No differences were found when measurements were compared between groups, showing no significant difference between weight/body sizes to the electrocardiographic parameters (P<0.05). The mean corrected QT values (QTc) obtained using diverse formulae were significantly different (P<0.05), were the most consistent was Van der Water (QTcV). QTcV values were strongly correlated (r=98) and 95% confidence interval 185.7 to 195.2ms.Considering its simplicity and reliability, the QTcV was deemed the most appropriate to be used for the correction of QT interval in conscious guinea pigs.The results of this study also suggest that the values found can be used as reference for the species.

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Khayrutdinova, G. M. "Left ventricle remodeling electrocardiography criteria of survival assessment in Q-wave myocardial infarction patients". Kazan medical journal 94, n.º 2 (15 de abril de 2013): 168–75. http://dx.doi.org/10.17816/kmj1582.

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Aim. To study the survival in patients with Q-wave myocardial infarction depending on features of left ventricle remodeling on electrocardiography. Methods. 10-year overall survival and heart diseases associated survival rates depending on features of left ventricle remodeling on electrocardiography were studied in 87 patients who had survived an acute myocardial infarction with Q wave. The first group included 45 patients who fulfilled electrocardiographic criteria for left ventricle adaptive remodeling, the second group included 42 patients with electrocardiographic features of left ventricle maladaptive remodeling. The survival in both groups was estimated using the Kaplan-Meier’s curves. Results. There was a highly significant inverse relationship between age and survival rate of the patients with Q-positive myocardial infarction. 40 patients succumbed by the end of the observation period, among them - 20 (50%) due to heart diseases. 20 (50%) patients died from non-cardiac events, among them - ischaemic stroke, neoplasms and accidents (most common - alcohol intoxication, 5,8% each). Chronic heart failure was most common reason of death in both groups, and it prevailed in the group of patients with left ventricle maladaptive remodeling electrocardiographic features. According to the gained data, there were no significant differences observed in overall survival in both groups during the whole follow-up period. In assessment of survival associated with heart diseases, the differences close to the statistically significant were found. Conclusion. The comparison of the overall survival depending on left ventricle remodeling electrocardiographic features did not detect any reliable differences, while in case of heart diseases associated survival assessment differences close to the statistically significant were found.

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Watanabe, Toshio, Tetsu Watanabe, Tomo Suzuki, Hiromi Abe, Saori Fukase, Yumi Wada, Tomoaki Sato, Keita Morikane e Isao Kubota. "Automatic Detection of Brugada Type Electrocardiography in Holter Electrocardiographic Monitoring". Japanese Journal of Electrocardiology 31, n.º 3 (2011): 234–41. http://dx.doi.org/10.5105/jse.31.234.

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Mahmood, Alaa K., Faisal G. Habasha e Ali A. AL- Khayaat. "Electrocardiaographic survey on dogs in Baghdad province". Kufa Journal For Veterinary Medical Sciences 6, n.º 2 (31 de dezembro de 2015): 81–86. http://dx.doi.org/10.36326/kjvs/2015/v6i23991.

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This study was designed to investigate electrocardiography changes in 100 dogs(50 male and 50 female) in Baghdad province to detect incidence of cardiac disorder . The results indicated that electrocardiographic abnormalities are 27% of examined dogs , nodular ectopic 2%, complet heart block 5%,ventricular tachycardia 6% ,bradycardia 8% and decreased T amplitude 6 %. The cardiac arrhythmia and hypokalaemia were the most common cause of cardiac disorders. There were differences between sexes for ECG parameters

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Mahmood, Alaa K., Faisal G. Habasha e Ali A. AL- Khayaat. "Electrocardiaographic survey on dogs in Baghdad province". Kufa Journal For Veterinary Medical Sciences 6, n.º 2 (31 de dezembro de 2015): 81–86. http://dx.doi.org/10.36326/kjvs/2015/v6i23991.

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This study was designed to investigate electrocardiography changes in 100 dogs(50 male and 50 female) in Baghdad province to detect incidence of cardiac disorder . The results indicated that electrocardiographic abnormalities are 27% of examined dogs , nodular ectopic 2%, complet heart block 5%,ventricular tachycardia 6% ,bradycardia 8% and decreased T amplitude 6 %. The cardiac arrhythmia and hypokalaemia were the most common cause of cardiac disorders. There were differences between sexes for ECG parameters

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Agostinelli, Angela, Ilaria Marcantoni, Elisa Moretti, Agnese Sbrollini, Sandro Fioretti, Francesco Di Nardo e Laura Burattini. "Noninvasive Fetal Electrocardiography Part I: Pan-Tompkins' Algorithm Adaptation to Fetal R-peak Identification". Open Biomedical Engineering Journal 11, n.º 1 (31 de março de 2017): 17–24. http://dx.doi.org/10.2174/1874120701711010017.

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Background: Indirect fetal electrocardiography is preferable to direct fetal electrocardiography because of being noninvasive and is applicable also during the end of pregnancy, besides labor. Still, the former is strongly affected by noise so that even R-peak detection (which is essential for fetal heart-rate evaluations and subsequent processing procedures) is challenging. Some fetal studies have applied the Pan-Tompkins’ algorithm that, however, was originally designed for adult applications. Thus, this work evaluated the Pan-Tompkins’ algorithm suitability for fetal applications, and proposed fetal adjustments and optimizations to improve it. Method: Both Pan-Tompkins’ algorithm and its improved version were applied to the “Abdominal and Direct Fetal Electrocardiogram Database” and to the “Noninvasive Fetal Electrocardiography Database” of Physionet. R-peak detection accuracy was quantified by computation of positive-predictive value, sensitivity and F1 score. Results: When applied to “Abdominal and Direct Fetal Electrocardiogram Database”, the accuracy of the improved fetal Pan-Tompkins’ algorithm was significantly higher than the standard (positive-predictive value: 0.94 vs. 0.79; sensitivity: 0.95 vs. 0.80; F1 score: 0.94 vs. 0.79; P<0.05 in all cases) on indirect fetal electrocardiograms, whereas both methods performed similarly on direct fetal electrocardiograms (positive-predictive value, sensitivity and F1 score all close to 1). Improved fetal Pan-Tompkins’ algorithm was found to be superior to the standard also when applied to “Noninvasive Fetal Electrocardiography Database” (positive-predictive value: 0.68 vs. 0.55, P<0.05; sensitivity: 0.56 vs. 0.46, P=0.23; F1 score: 0.60 vs. 0.47, P=0.11). Conclusion: In indirect fetal electrocardiographic applications, improved fetal Pan-Tompkins’ algorithm is to be preferred over the standard, since it provides higher R-peak detection accuracy for heart-rate evaluations and subsequent processing.

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Junckes, Jessica, Eduarda Aléxia Nunes Louzada Dias Cavalcanti, Thames Camargo Ignácio, Roberta Oliveira de Carvalho, Guilherme Albuquerque de Oliveira Cavalcanti e Maristela Silveira Palhares. "Electrocardiographic and laboratory alterations in anorexic cats". Semina: Ciências Agrárias 41, n.º 3 (7 de abril de 2020): 1061. http://dx.doi.org/10.5433/1679-0359.2020v41n3p1061.

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Anorexia, the result of inadequate nutrient intake, can lead to death and is a constant problem in the feline clinic. However, we did not find any previous studies that evaluated cardiac measures in felines. Therefore, we evaluated 27 emaciated cats by means of hematological exams, urinalysis, and electrocardiography. In the serum, we noted increased creatine kinase, aspartate aminotransferase, and lactate enzyme levels. Further, 62.96% of the cats exhibited electrocardiographic alterations. The most frequent electrocardiographic changes were increased QRS complex duration and QT interval increase. As clinicians become more aware of cardiovascular complications related to malnutrition, they are better able to recognize and assist this animal class.

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MacAdams, Charles Leslie, R. William McIntyre e Ian Robert Thomson. "Basic Electrocardiography". Anesthesiology Clinics of North America 7, n.º 2 (junho de 1989): 263–91. http://dx.doi.org/10.1016/s0889-8537(21)00205-4.

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Sorokivskyy, Mykhaylo, Rostyslav Kovalchuk e Volodymyr Kulish. "Quiz: Electrocardiography". Heart, Vessels and Transplantation 5, Volume 1 (20 de janeiro de 2021): 37. http://dx.doi.org/10.24969/hvt.2020.239.

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Ambrose, Kate. "Advanced electrocardiography". Emergency Nurse 13, n.º 4 (julho de 2005): 6. http://dx.doi.org/10.7748/en.13.4.6.s14.

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Barwad, Parag. "Electrocardiography quiz". Journal of the Practice of Cardiovascular Sciences 1, n.º 1 (2015): 72. http://dx.doi.org/10.4103/2395-5414.157578.

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Matic, Sue. "Equine electrocardiography". Equine Veterinary Education 2, n.º 3 (setembro de 1990): 158–60. http://dx.doi.org/10.1111/j.2042-3292.1990.tb01426.x.

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Smith, C. R., R. L. Hamlin e H. D. Crocker. "COMPARATIVE ELECTROCARDIOGRAPHY*". Annals of the New York Academy of Sciences 127, n.º 1 (16 de dezembro de 2006): 155–69. http://dx.doi.org/10.1111/j.1749-6632.1965.tb49400.x.

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&NA;. "Understanding Electrocardiography". American Journal of Nursing 97, n.º 3 (março de 1997): 16N. http://dx.doi.org/10.1097/00000446-199703000-00024.

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H R H. "Exercise Electrocardiography". Journal of Occupational and Environmental Medicine 27, n.º 5 (maio de 1985): 326. http://dx.doi.org/10.1097/00043764-198505000-00004.

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Rowlands, D. "Clinical Electrocardiography". Dimensions of Critical Care Nursing 11, n.º 2 (março de 1992): 67. http://dx.doi.org/10.1097/00003465-199203000-00004.

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