Tesis sobre el tema "Aortic Replacement"
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Joyce, Ruth Ann. "Quality of life and cerebral ischaemia following aortic valve replacement and transcatheter aortic valve replacement". Thesis, St George's, University of London, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.706528.
Texto completoKlieverik, Loes Maria Anne. "Aortic valve replacement in young adults". [S.l.] : Rotterdam : [The Author] ; Erasmus University [Host], 2007. http://hdl.handle.net/1765/10778.
Texto completoNowell, Justin L. "Anticoagulation Following Tissue Aortic Valve Replacement". Thesis, St George's, University of London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517184.
Texto completoPark, Kenneth Stuart. "Stents for transcatheter aortic valve replacement". Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/27372.
Texto completoLopez, Marco Ana. "Low-flow low-gradient aortic stenosis: outcomes after aortic valve replacement". Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/667817.
Texto completoLa estenosis aórtica es la enfermedad valvular más frecuente en el tercer mundo. La historia natural de la enfermedad es bien conocida desde hace décadas, siendo una enfermedad con mal pronóstico a medio-corto plazo que hace necesario someter a estos pacientes a recambio valvular aórtico tras la aparición de síntomas. La forma mas común de estenosis aórtica, con flujo normal y gradiente alto, tiene un pronóstico excelente tras el recambio valvular aórtico, con una supervivencia similar a la de la población normal. Sin embargo, la estenosis aórtica de bajo-flujo y bajo-gradiente, es una entidad menos conocida y de peor pronóstico. Estos pacientes tienen una mortalidad mucho mayor tras recambio valvular aórtico y menor supervivencia a largo plazo. El diagnóstico en el bajo-flujo bajo-gradiente es vital para seleccionar correctamente los pacientes con estenosis aórtica que se beneficiarán de tratamiento quirúrgico, teniendo también valor pronóstico, dependiendo de la categoría de bajo flujo (Clásica o Paradójica) y otros determinantes como la presencia/ausencia de reserva contráctil del ventrículo izquierdo. Nuestra hipótesis fue que la estenosis aórtica de bajo-flujo y bajo-gradiente, pueden ser tratada con recambio valvular aórtico con una mortalidad hospitalaria similar a aquellos con flujo normal y alto gradiente. Los objetivos del proyecto fueron el análisis de resultados hospitalarios y a medio plazo (mortalidad hospitalaria, a 1 y 5 años) así como la clase funcional y recuperación de la función ventricular, en pacientes con estenosis aórtica de bajo-flujo bajo-gradiente sometidos a recambio valvular aórtico comparado con flujo normal alto-gradiente. Nuestros resultados nos llevan a la conclusión de que el recambio valvular aórtico en pacientes con estenosis aórtica de bajo-flujo bajo-gradiente se puede lograr con baja mortalidad quirúrgica, comparable con pacientes con flujo normal y alto gradiente. A pesar de que tener una mayor mortalidad a medio-plazo, los supervivientes exhiben una excelente clase funcional y desaparición de síntomas, que apoyan la indicación quirúrgica en estos pacientes.
Hatoum, Hoda. "Fluid Mechanics of Transcatheter Aortic Valve Replacement". The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1541781379381912.
Texto completoNai, Fovino Luca. "Coronary access after transcatheter aortic valve replacement". Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3424785.
Texto completoJanicki, Andrew Joseph. "ANALYSIS OF PARTICLES THOROUGH THE AORTIC ARCH DURING TRANSCATHETER AORTIC VALVE REPLACEMENT". DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1448.
Texto completoHe, Zhengfu [Verfasser]. "Percutaneous Aortic Valve Replacement [[Elektronische Ressource]] : The Anatomy of Aortic Root Structures and Postmortem Aortic Valve Stent Implantation / Zhengfu He". Kiel : Universitätsbibliothek Kiel, 2011. http://d-nb.info/1020200936/34.
Texto completoMusa, Tarique Al. "Transcatheter and surgical aortic valve replacement for severe aortic stenosis : insights from cardiovascular magnetic resonance imaging". Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/15238/.
Texto completoZhao, Ying. "Effect of valve replacement for aortic stenosis on ventricular function". Doctoral thesis, Umeå universitet, Institutionen för folkhälsa och klinisk medicin, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46809.
Texto completoRubino, A. S. (Antonino S. ). "Efficacy of the Perceval sutureless aortic valve bioprosthesis in the treatment of aortic valve stenosis". Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526212289.
Texto completoTiivistelmä Aorttaläpän ahtauma on yksi yleisimmistä läppävioista kehittyneissä maissa. Aorttaläpän ahtauma on etenevä sairaus, joka yleensä johtaa vakaviin henkeä uhkaaviin haittatapahtumiin. Aorttaläpän ahtauman hoitotavasta keskustellaan kiivaasti sydän- ja verisuonitautien tutkimuksessa siihen liittyvien kliinisten ja taloudellisten vaikutusten vuoksi. Aorttaläppäleikkausta, jossa aorttaläppä korvataan proteesilla, on aina pidetty vaikean oireisen aorttaläpän ahtauman hoidon kultaisena standardina, koska sen tulokset ovat erinomaisia, etenkin oireettomilla potilailla, joilla sydämen toiminta on hyvä. Leikkaus vaatii sydän-keuhkokoneen käyttöä ja aortan sulkemista, joiden kesto on suoraan yhteydessä kasvavaan sairastavuuteen ja kuolleisuuteen erityisesti potilailla, joilla on muitakin sairauksia. Niinpä tekniikat, jotka lyhentävät sydän-keuhkokoneen käyttöaikaa ja aortan sulkuaikaa, voivat mahdollisesti parantaa aorttaläppäleikkauksen tuloksia. Tässä tutkimuksessa osoitettiin, että ompeleettoman biologisen Perceval-läppäproteesin käyttö vähensi merkittävästi leikkauksen kestoa. Tämä oli yhteydessä parantuneisiin lyhyen ja pitkän aikavälin tuloksiin leikkauksen jälkeen. Ompeleettoman biologisen Perceval-läppäproteesin käyttö voi helpottaa aorttaläppäleikkausta, koska se voidaan asentaa vähemmän kajoavasta avauksesta, ja siihen liittyy vähemmän punasolusiirtoja rintalastan kokoavaukseen verrattuna, myös silloin kun käytetään kokoavausta ja perinteisiä stenttibioproteeseja. Voisi olla odotettavaa, että keskisuuren tai suuren riskin potilaat hyötyisivät enemmän leikkauksesta, jossa yhdistyvät toimenpiteen nopeus ja vähäisempi kajoavuus. Katetriteitse asennettuun biologiseen keinoläppään (TAVI) verrattuna ompeleeton biologinen Perceval-läppäproteesi oli yhteydessä parempaan laitteen toimimiseen ja pienempään paravalvulaariseen vuotoon. Muut tulokset heti leikkauksen jälkeen ja yhden vuoden seurannassa olivat samanlaisia. Lopuksi voidaan todeta, että aorttaläppäleikkaukseen ompeleettomalla biologisella Perceval-läppäproteesilla liittyi erinomainen hemodynamiikka levossa ja korkean työkuorman aikana. Stressin aikaisen tehokkaan aorttaläpän aukon pinta-alan merkittävä kasvu osoittaa, että ompeleeton biologinen Perceval-läppäproteesi on hyvä valinta potilaille, joilla on pieni aorttaläpän aukko tai kun on odotettavissa proteesin ja potilaan yhteensopimattomuutta
Alassar, Aiman. "Incidence and mechanisms of cerebral ischaemia following transcatheter aortic valve implantation compared with surgical aortic valve replacement". Thesis, St George's, University of London, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.686423.
Texto completoTaniguchi, Tomohiko. "Initial Surgical VersusConservative Strategies in Patients With Asymptomatic Severe Aortic Stenosis". 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225456.
Texto completoDing, Wenhong. "Survival and functional recovery following valve replacement in patients with severe aortic stenosis". Doctoral thesis, Umeå universitet, Medicin, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-82644.
Texto completoKanamori, Norio. "Prognostic Impact of Aortic Valve Area in Conservatively Managed Patients With Asymptomatic Severe Aortic Stenosis With Preserved Ejection Fraction". Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263349.
Texto completoFairbairn, Tim. "Severe aortic valve stenosis and the consequences of transcatheter and surgical aortic valve replacement : a cardiovascular magnetic resonance study". Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/5853/.
Texto completoBarbosa, Ribeiro Henrique. "Incidence, predictors and outcomes of myocardial injury following transcatheter aortic valve replacement". Doctoral thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26635.
Texto completoL’implantation de valve aortique par cathéter (TAVI) a été développée comme une alternative thérapeutique pour les patients avec une sténose aortique sévère et ayant un risque opératoire élevé ou extrême en cas de chirurgie de remplacement valvulaire standard. Par rapport à la chirurgie à cœur ouvert classique, les procédures de TAVI sont moins invasives, parce qu'elles ne sont pas associées au clampage aortique et à la cardioplégie. Toutefois, la procédure implique un certain degré de dommage myocardique dû à la compression du tissu par le ballonnet et la prothèse transcathéter, ainsi que plusieurs courts épisodes d'hypotension extrême et d’ischémie myocardique globale, au cours de la stimulation ventriculaire rapide et du déploiement de la prothèse. De plus, l'approche transapicale, qui est réalisée lorsque l'approche transfémorale n’est pas possible, comprend la ponction de l'apex du ventricule gauche et l'introduction de larges cathéters ce qui augmente vraisemblablement encore les dommages myocardiques. En conséquence, presque tous les patients subissant un TAVI présentent un certain degré de dommage myocardique, défini par une augmentation des enzymes cardiaques, telles que la créatine kinase-MB (CK-MB), la troponine ou le peptide natriurétique de type B (BNP). Néanmoins, les données sur l'incidence exacte des dommages myocardiques, leur étendue, leurs prédicteurs, ainsi que les résultats échocardiographiques et cliniques associés, en fonction des différentes approches et prothèses sont limitées. Les objectifs généraux de mon projet de doctorat sont d'évaluer l'incidence, les facteurs prédictifs et les résultats des dommages myocardiques après TAVI pour le traitement des patients symptomatiques avec sténose aortique sévère ou bioprothèse dysfonctionnelle et à haut risque chirurgical.
Transcatheter aortic valve replacement (TAVR) has emerged as a less invasive therapeutic alternative to surgical aortic valve replacement (SAVR) for patients with severe aortic stenosis at very high-risk or prohibitive perioperative risk. Compared to conventional open-heart surgery, TAVR procedures are less invasive, because they are not associated with aortic cross-clamping and cardioplegia. Even so, the procedure involves some degree of myocardial injury due to tissue compression, caused by the balloon and valve prosthesis, as well as several short episodes of extreme hypotension and global ischemia, during rapid ventricular pacing and valve deployment. Also, the transapical approach, which is an alternative to the transfemoral approach, involves the puncture of the ventricular apex and the introduction of large catheters through it. Accordingly, nearly all patients undergoing TAVR present some degree of myocardial injury, as defined by any increase in cardiac biomarkers, including creatine kinase-MB (CK-MB), troponin or B-type natriuretic peptides (BNP). Nonetheless, data on the exact incidence of myocardial injury, extent, predictors, as well as the associated echocardiographic and clinical outcomes, according to the different type of TAVR procedures and transcatheter valves, have been limited. The general objectives of my PhD project are to evaluate the incidence, predictors and outcomes of myocardial injury following TAVR for the treatment of high-risk patients with severe symptomatic AS or dysfunctional aortic bioprosthesis.
Kumar, Anirudh. "SAFETY AND EFFICACY OF BALLOON AORTIC VALVULOPLASTY STRATIFIED BY ACUITY OF PATIENT ILLNESS". Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1623349720127583.
Texto completoAlkhalil, Ahmad. "Outcomes Of Early Versus Late Discharge In Transfemoral Transcatheter Aortic Valve Replacement Via Minimally Invasive Strategy: A Propensity-Matched Analysis". Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1465592493.
Texto completoMiyake, Makoto. "Early Surgery vs. Surgery After Watchful Waiting for Asymptomatic Severe Aortic Stenosis". Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/264637.
Texto completoMuta, Eri. "Impact of the left ventricular mass index on the outcomes of severe aortic stenosis". Kyoto University, 2019. http://hdl.handle.net/2433/242385.
Texto completoElsmaan, Mamdouh Aly Mohammed [Verfasser] y Andreas [Akademischer Betreuer] Zirlik. "Transcatheter and surgical aortic valve replacement in patients with previous coronary bypass grafts". Freiburg : Universität, 2017. http://d-nb.info/1134968086/34.
Texto completoDobson, Laura Elizabeth. "Cardiovascular magnetic resonance imaging in severe aortic stenosis : impact of surgical and trans-catheter aortic valve replacement on reverse remodelling and fibrosis". Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/12944/.
Texto completoDELLA, ROSA FRANCESCO. "Impact of asymptomatic carotid stenosis on mid term outcome of transcatheter aortic valve replacement". Doctoral thesis, Università degli Studi di Milano-Bicocca, 2016. http://hdl.handle.net/10281/105574.
Texto completoDellgren, Göran. "Aortic valve replacement with stentless bioprostheses : prospective long-term studies of the Biocor and the Toronto SPV /". Stockholm : Karolinska institutet, 2002. http://diss.kib.ki.se/2002/91-7349-152-7.
Texto completoKidher, Emaddin. "The relationship between aortic stiffness, health related quality of life and post-operative organs recovery (cardiac, renal and cognitive) following aortic valve replacement". Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/33126.
Texto completoHagen-Peter, Gayle Ann. "Living with Aortic Stenosis: A Phenomenological Study of Patients' Experiences and Subsequent Health Choices". ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/516.
Texto completoZahaf, Marwah. "Effect of Transcatheter Aortic Valve Replacement on Right Ventricular Function| Meta analyses and Systematic Review". Thesis, Rush University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=1581898.
Texto completoObjectives: We ought to compare the effect of transcatheter aortic valve replacement (TAVR) and surgical aortic valve replacement (SAVR) on right ventricular systolic function (RVSF) in high risk patients with severe aortic stenosis (AS). Methodology: Data Source. PubMed, EMBASE, Cochrane library, and references of selected articles. Study Endpoints. Transthoracic echocardiography was utilized to assess the change in RVSF post TAVR versus SAVR using tricuspid annular plane systolic excursion (TAPSE), and Fractional area change (RVFAC). Statistical analyses. Random effect model on standardized mean difference (Hedges; g) were used together with heterogeneity assessment. Result: We included 485 patients from five single-center observational studies. Comparing TAVR with SAVR, TAVR resulted in better improvement in RVSF [TAPSE (g=2.88, SE=0.63, P<0.001, Q=73.18, /2=94.53, r=0.65), and RVFAC (g=0.91, SE=0.16, P<0.001, Q=2.39, /2=16.61), r=0.65]. Conclusion: Compared with SAVR, TAVR is preferred aortic intervention in patients with severe symptomatic AS and RV systolic dysfunction.
Silaschi, Miriam Christine [Verfasser] y Hermann [Akademischer Betreuer] Reichenspurner. "Transcatheter aortic valve implantation versus surgical aortic valve replacement : a propensity score analysis in patients at high surgical risk / Miriam Christine Silaschi. Betreuer: Hermann Reichenspurner". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2014. http://d-nb.info/1048626458/34.
Texto completoNakatsu, Taro. "Intermediate-term outcomes of aortic valve replacement with bioprosthetic or mechanical valves in patients on hemodialysis". Kyoto University, 2020. http://hdl.handle.net/2433/252979.
Texto completoStraiton, Nicola. "The acceptability of heart valve replacement procedures, and patient-reported outcomes in adults with aortic stenosis". Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29843.
Texto completoDe, Rui Marina. "Aortic valve replacement in elderly subjects: effects on physical performance, cognitive function and quality of life". Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3425391.
Texto completoPremessa: la stenosi valvolare aortica (AVS) sta diventando sempre più frequente nella popolazione anziana, coinvolgendo circa il 13.2% dei soggetti sopra i 75 anni. Oltre a compromettere la qualità della vita, la AVS di grado severo non trattata porta alla morte in un tempo relativamente breve. La storia naturale della AVS può essere modificata dalla sostituzione della valvola aortica (AVR). I progressi nelle tecniche operatorie e anestesiologiche hanno ampliato negli ultimi anni l’accesso all’intervento chirurgico a pazienti sempre più anziani e sempre più fragili. In letteratura gli studi hanno finora valutato l’efficacia della AVR nel paziente anziano in termini di mortalità peri- e post-operatoria, mentre mancano dati circa l’esito dell’intervento sulla salute globale del paziente fragile a medio termine. Scopo dello studio: lo scopo del nostro studio era valutare nel soggetto anziano l’impatto dell’intervento di AVR sulla performance fisica, sullo stato cognitivo e sulla qualità di vita a distanza di 45 giorni, tre e sei mesi dall’intervento chirurgico. Soggetti e metodi: in collaborazione con l’U.O. Cardiochirurgia, secondo un disegno osservazionale longitudinale sono stati studiati 46 pazienti di età > 70 anni affetti da AVS per i quali era stata posta indicazione all’AVR. I soggetti sono stati valutati prima dell’intervento chirurgico (T0) e dopo l’intervento chirurgico a 45 giorni (T1), a tre mesi (T2) e a 6 mesi (T3). In tutte le visite i soggetti sono stati sottoposti a una valutazione geriatrica multidimensionale, comprensiva di esame clinico, valutazione dell’autonomia funzionale (Activites of Daily Living e Instrumental Activites of Daily Living Scales), dello stato cognitivo (Mini Mental State Examination, Montreal Cognitive Assessment), del tono dell’umore (Geriatric Depression Scale), della qualità di vita (Short-Form 36 items Health Survey, SF-36) e della performance fisica (Short Physical Performance Battery, Gait Speed, Six minute Walking Test, misurazione della forza massimale degli arti superiori e inferiori). Risultati: dei 46 pazienti inclusi nello studio in questo lavoro sono stati considerati solo i 22 soggetti che hanno completato il follow-up a 6 mesi. Rispetto alla valutazione preoperatoria, al follow-up dei 45 giorni era evidente un significativo peggioramento nei parametri nutrizionali (BMI,circonferenza del braccio, punteggio MNA) e dei test di performance fisica (forza massimale di prensione della mano, forza di flesso-estensione degli arti inferiori e test isometrico della forza degli arti inferiori). Al follow-up dei 6 mesi MNA, MMSE, MoCA, SPPB miglioravano significativamente, raggiungendo valori superiori a quelli basali. La forza degli arti superiori e inferiori non si modificava significativamente 6 mesi dopo l’intervento rispetto al basale. Per ciò che concerne la qualità di vita, i punteggi all’SF-36 rimanevano pressoché stabili a 45 giorni mentre miglioravano significativamente al controllo a 3 e a 6 mesi. Considerando la variazione della velocità del passo tra la valutazione basale e quella a 6 mesi, i soggetti che presentavano un miglioramento nel follow up, rispetto agli altri soggetti al basale presentavano valori più bassi di forza degli arti superiori e inferiori, di velocità del passo e percorrevano una distanza significativamente inferiore al 6-MWT. Conclusioni: i dati di questo studio evidenziano che nei pazienti anziani affetti da AVS, la sostituzione valvolare aortica migliora lo stato nutrizionale, le facoltà cognitive, il tono dell’umore, la performance fisica e la qualità di vita. La forza degli arti inferiori e superiori invece mantiene a 6 mesi valori non diversi da quelli pre-operatori. I soggetti che sembrano beneficiare maggiormente dal punto di vista funzionale della AVR sono quelli più compromessi a basale dal punto di vista della performance fisica.
Parche, Julius [Verfasser]. "Femoral access-site complications in patients undergoing transcatheter aortic valve replacement with new generation devices / Julius Parche". Ulm : Universität Ulm, 2020. http://d-nb.info/1219146218/34.
Texto completoBesada, Joona. "A Virtual Heart Valve Implant System : Navigating the idea space and developing a proof of concept for virtual transcatheter aortic valve replacement". Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168740.
Texto completoAortastenos är en sjukdom som orsakar förträngning av aortaklafföppningen. Det är en sjukdom som återfinns hos mer än 2% av den äldre befolkningen. Tidigare har den enda effektiva behandlingen inneburit hjärtklaffersättning med öppen hjärtkirurgi, men under det senaste decenniet har det blivit möjligt att också behandla aortastenos med en perkutär procedur i form av kateterburen implantation av aortaklaff. En kateter som bär på en aortaklaffprotes förs fram till patientens hjärta där protesen sedan utplaceras. Dimensionering, positionering och orientering av protesen är viktiga överväganden i kateterburen implantation av aortaklaff. Syfte: Syftet är att undersöka genomförbarheten och potentiella funktioner hos ett virtuellt implanteringssystem för hjärtklaffproteser och hur tillgångarna hos Medical Devices Center och deras samarbetspartners kan skapa ett användbart verktyg för virtuell dimensionering, positionering samt orientering av kateterburna hjärtklaffproteser. Implementering: Utmaningar med kateterburen hjärtklaffimplantering bland kliniker och ingenjörer identifierades. Ett virtuellt implanteringssystem för hjärtklaffproteser föreslogs som en lösning. Idérymden utforskades och strukturerades systematiskt med en ny metod kallad för idésambandsträd-metoden. En konceptprototyp med 3D modeller på en aorta och en protes i tre olika storlekar skapades för att uppskatta om det finns användarvärde i ett virtuellt implanteringssystem för hjärtklaffproteser. Resultat & Slutsats: För den föreslagna lösningen av ett virtuellt implanteringssystem för hjärtklaffproteser genererades 43 unika idéer. Tre huvudsakliga grenar av idéer identifierades: Konstruering, simulering och en databasgren. Det uppskattades att simuleringsgrenen skulle kunna förse den största mängden användarvärde för en förhållandevis låg arbetsinsats. Konceptprototypen visade att det var möjligt att visuellt utvärdera interferensen av olika protesstorlekar inuti en 3D model av en aorta med hjälp av ett virtual reality system.
Abessi, Ovais. "Leaflet Material Selection for Aortic Valve Repair". Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/30191.
Texto completoBERTOLDO, FABIO. "La protesi Valsalva nella chirurgia sostitutiva della radice aortica con conservazione della valvola nativa: follow-up a lungo termine". Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/208570.
Texto completoBackground: The reimplantation valve-sparing aortic root replacement is safe and characterized by short and long-term good results. Several modifications have been proposed to rebuilt the complex anatomo-functional structure of the aortic root in the attempt to improve the long-term results. The Valsalva graft appears to be useful in order to recreate more closely such a structure also concurring to a greater reproducibility and standardization of this technique. We retrospectively analyzed our perioperative and long-term follow-up data. Methods: From May 2000 to October 2009, 42 patients (36 males, mean age of 53±10 years) underwent reimplantation valve-sparing aortic root replacement using the Valsalva graft. Sixteen patients (38.1%) had Marfan syndrome and 2 (4.8%) had bicuspid aortic valve. Fifteen (35.7%) underwent concomitant cardiac procedures. Results: The in-hospital mortality was 2.4%. There were no dropouts at the follow-up, which lasted 80 ± 36 months (median 94 months and range from 0 to 120 months). There were 4 late deaths during the period of observation, and so the 10-years cumulative actuarial survival was 88.1%. In 7 patients (16.4%) did not show satisfactory results: the 10-years freedom from recurrence of aortic insufficiency not needing reoperation was 95.2%, while the 10-years freedom from aortic valve reoperation was 88.1%. Conclusions: The reimplantation valve-sparing aortic root replacement using the Valsalva graft is safe and characterized by a low in-hospital mortality. The peculiar reconstruction of the aortic root, guaranteed by this conduit, positively influences the long-term results. Moreover, the Valsalva graft appears to favour a good reproducibility and a good standardization of this procedure.
Boer, Berta Paula Napchan. "Comparação da função diastólica entre o pré e pós-operatório de pacientes portadores de estenose aórtica ou insuficiência aórtica, baseados em dados bioquímicos e ecocardiográficos". Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/5/5131/tde-30032010-181154/.
Texto completoINTRODUCTION: Assessment of diastolic function in patients with aortic stenosis or aortic regurgitation waiting for aortic valve replacement. OBJECTIVE: Assesment of diastolic function with Doppler methods:Doppler signals from transvalvar mitral inflow, tissue Doppler imaging (TDI) and Doppler in pulmonary veins(DPV) correlating with serum brain peptide natriuretic (NTproNP) before and 6 months after aortic valve replacement (AVR). METHODS: We have analyzed 63 patients, 32 with AR (25 males and 7 females), 31 AS (11 males and 20 females).The indices were compared with AS and AR before and after AVR. RESULTS: The ages of patients ranged from 21 to 81 mean age was 55 years old.We have seen difference between mean age of AS and AR (t-Student-p<0.0001). Patients with AR have had mean age 45.67 plus/minus 14.28, range 21 to 79 years old and patients with AS have had mean age 61.50 plus/minus 14.72, range 21 to 81 years old. The patients who had AR the indices showed differences: Isovolumetric Relaxation Time IRT(p=0.0011), Diference between the pulmonary A wave duration and mitral A duration (p=0.0097), Left Atrial Systolic Volume (p=0.0019), Left Atrial Systolic Volume Index(p=0.0011), Left Atrial Diastolic Volume (p=0.0110), Left Ventricular Diastolic Diameter (p<0.0001), Left Ventricular Systolic Diameter (p<0.0001), End Systolic Volume (p<0.0001), End Diastolic Volume (p<0.0001), Left Ventricular Mass Index (p<0.0001) and Left Ventricular Volume and Left Ventricular Mass Index ratio (p<0.0001). Analyzing patients with AS the indices who showed differences: (The ratio of mitral velocity to early diastolic velocity of the mitral annulus) E/E (p=0.0379)(Isovolumetric Relaxation Time)(p=0.0072) IRT, Diference between the pulmonary A wave duration and mitral A duration (p=0.0176), Left Atrial Sistolic Volume (p=0.0242), Left Atrial Systolic Volume Index (p=0.0237), Left Atrial Ejection Fraction (p=0.0339) Left Ventricular Diastolic Diameter (p=0.0002), Left Ventricular Systolic Diameter (p=0.0085), End Diastolic Volume (LVEDV) (p=0.0194), Left ventricular Mass Index(p<0.0001), Left Ventricular Volume and Mass Index Ratio (p<0.0001). CONCLUSIONS: As we studied diastolic function we have verified significant statistic variation in aortic regurgitation and aortic stenosis comparing before and after aortic valve replacement. Likewise we have seen there is correlation between NTproBNP and echocardiographic variables that show diastolic dysfunction.
Almeida, Adriana Silveira de. "Comparação da sobrevida entre indivíduos submetidos à cirurgia para substituição valvar aórtica utilizando próteses mecânicas ou biológicas em uma coorte brasileira". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/28695.
Texto completoThis paper evaluates mortality, bleeding events and reoperation in patients subjected to surgery for replacement of the aortic valve using a biological or a mechanical substitute, where selection of the type of prosthesis is relevant. Three hundred and one patients who had been subjected to aortic valve replacement surgery between 1990 and 2005, with a maximum follow-up period of 20 years, have been randomly selected. Survival at 5, 10 and 15 years after surgery using a mechanical substitute was 83.9%, 75.4% and 60.2% and, for a biological substitute, was 89.3%, 70.4% and 58.4%, respectively (p=0.939). Factors associated with death were: age, obesity, pulmonary disease, arrhythmia, bleeding and aortic valve failure. The probability free of reoperation for these patients at 5, 10 and 15 years after surgery using a mechanical substitute was 97.9%, 95.8% and 95.8% and, for those using bioprostheses, was 94.6%, 91.0% and 83.3%, respectively (p=0.057). Factors associated with reoperation were: renal failure, prosthesis endocarditis and age. The probability free of bleeding events at 5, 10 and 15 years after surgery using the mechanical substitute was 94.5%, 91.7% and 91.7% and, for bioprostheses, was 98.6%, 97.8% and 97.8%, respectively (p=0.047). Factors associated with bleeding events were: renal failure and mechanical prostheses. The authors have concluded that: 1) mortality was statistically similar in the groups; 2) patient characteristics at baseline were a major determinant of late mortality after surgery; 3) there was a tendency toward reoperation in the bioprostheses group; 4) patients using a mechanical prosthesis had more bleeding events as time passed; 5) the data presented in this paper is in accordance with current literature.
Calcutteea, Avin. "New insights in the assessment of right ventricular function : an echocardiographic study". Doctoral thesis, Umeå universitet, Medicin, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-66725.
Texto completoUddin, Akhlaque. "Magnetic resonance imaging in the assessment of surgical and transcatheter aortic valve replacement : the impact on neurocognitive function and myocardial reverse remodelling". Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/16299/.
Texto completoXu, Xiang [Verfasser]. "Investigation of circulating microRNAs in response to transcatheter aortic valve replacement and exploration of their cellular function in cardiovascular cells / Xiang Xu". Bonn : Universitäts- und Landesbibliothek Bonn, 2021. http://d-nb.info/1238687741/34.
Texto completoSalem, Mostafa [Verfasser], Assad [Akademischer Betreuer] Haneya y Gunnar [Gutachter] Elke. "Acute kidney injury after ascending aorta and aortic arch replacement surgery with moderate hypothermia, circulatory arrest and cardiopulmonary bypass / Mostafa Ahmed Ali Ahmed Salem ; Gutachter: Gunnar Elke ; Betreuer: Assad Haneya". Kiel : Universitätsbibliothek Kiel, 2020. http://d-nb.info/1205314660/34.
Texto completoSalem, Mostafa Ahmed Ali Ahmed [Verfasser], Assad [Akademischer Betreuer] Haneya y Gunnar [Gutachter] Elke. "Acute kidney injury after ascending aorta and aortic arch replacement surgery with moderate hypothermia, circulatory arrest and cardiopulmonary bypass / Mostafa Ahmed Ali Ahmed Salem ; Gutachter: Gunnar Elke ; Betreuer: Assad Haneya". Kiel : Universitätsbibliothek Kiel, 2020. http://d-nb.info/1205314660/34.
Texto completoKnauer, Alexandra Mariel. "Fluid Flow Characterization and in Silico Validation in a Rapid Prototyped Aortic Arch Model". DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1700.
Texto completoCardone, Letizia [Verfasser], Payam [Gutachter] Akhyari y Timo [Gutachter] Brandenburger. "Evaluation of circulating exosomes in the course of surgical aortic valve replacement and coronary artery bypass grafting / Letizia Cardone ; Gutachter: Payam Akhyari, Timo Brandenburger". Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2021. http://d-nb.info/1233478222/34.
Texto completoOgunrombi, Akinwumi Babatunde. "Sixteen year retrospective analysis of rheumatic and non-rheumatic heart disease patients undergoing valve procedures at Groote Schuur Hospital first incidence single aortic and mitral valve replacement". Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/11525.
Texto completoIncludes bibliographical references.
Rheumatic heart disease is still the most common cause of valvular heart lesions requiring replacement or repair procedures worldwide. In South Africa, where there is an interesting mix of first and third world dynamics, factors sustaining the epidemic of rheumatic disease are still commonplace. The choice of appropriate valve procedure and prosthesis in our setting will depend on an adequate knowledge of short and long term outcomes of valve replacement and repair. The aim of this thesis was to evaluate the demographics and presentation of our rheumatic and non-rheumatic patients and to determine if our current implantation choices could be validated.
Shehada, Sharaf-Eldin Ibrahim Hassan [Verfasser], Bernhard J. [Akademischer Betreuer] Voss y Rüdiger [Akademischer Betreuer] Lange. "Propensity Score Analysis of Outcomes following Minimally Invasive versus Conventional Aortic Valve Replacement / Sharaf-Eldin Ibrahim Hassan Shehada. Gutachter: Bernhard J. Voss ; Rüdiger Lange. Betreuer: Bernhard J. Voss". München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1069621714/34.
Texto completoAl-Sabri, Saddam Mohammed Ahmed [Verfasser], Bernhard [Akademischer Betreuer] Danner, Anselm [Gutachter] Bräuer y Martin [Gutachter] Oppermann. "Impact of cerebral protection strategy used during open surgical aortic arch replacement on visceral function / Saddam Mohammed Ahmed Al-Sabri ; Gutachter: Anselm Bräuer, Martin Oppermann ; Betreuer: Bernhard Danner". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1208505920/34.
Texto completoFrança, Lucas Arraes de. "Medida do strain bidimensional do ventrículo esquerdo pré-implante percutâneo de endoprótese valvar aórtica: correlação com a evolução após o procedimento". Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/98/98131/tde-04102017-104138/.
Texto completoINTRODUCTION: Transcatheter aortic valve replacement (TAVR) is a therapeutic option for symptomatic patients with severe aortic stenosis. Approximately 200,000 patients around the world have already undergone TAVR. No large studies have evaluated prognostic correlation between echocardiographic parameters before TAVR and long-term cardiovascular events. It is relevant to analyze strain before procedure and how other parameters work as independent predictors of events after the procedure. METHODS: A total of 86 patients were evaluated from November 2009 to October 2016. They underwent echocardiographic evaluation before TAVR and 30 days after the procedure with analysis of strain of the left ventricle by bidimensional speckle tracking and other echocardiographic parameters. Patients were followed clinically and evaluated in relation to outcomes: global mortality, cardiovascular mortality, functional class of heart failure and need for cardiovascular readmissions. RESULTS: Global longitudinal strain before reduced TAVR (absolute value) increased the chance of cardiovascular readmission (odds ratio: 0.87; 0.77 ± 0.99; p = 0.038). Reduction of E/e´ relationship 30 days after TAVI was associated with a drop in global mortality (odds ratio: 0.97; 0.95 ± 0.99; p = 0.006). In addition, high values for this relation before the procedure were associated with higher rates of New York Heart Association functional class III or IV heart failure after the intervention (odds ratio: 1.08; 1.00 ± 1.18; p = 0.049). CONCLUSIONS: Results of this study indicate that global longitudinal strain before the procedure is a predictor of cardiovascular readmission after TAVR. The E/e´relationship before the procedure presented a correlation directly proportional to the development of long-term functional class III or IV heart failure as well as its accentuated drop 30 days after the procedure was correlated with lower global mortality.