Página 1 dos resultados de 3461 itens digitais encontrados em 0.009 segundos

Análise do tratamento cirúrgico da raiz da aorta com o tubo valvulado e com a preservação da valva aórtica; Analysis of aortic root surgery with composite mechanical aortic valve conduit and valve-sparing reconstruction

DIAS, Ricardo Ribeiro; MEJIA, Omar Asdrubal Vilca; FIORELLI, Alfredo Inácio; POMERANTZEFF, Pablo Maria Alberto; DIAS, Altamiro Ribeiro; MADY, Charles; STOLF, Noedir Antonio Groppo
Fonte: Sociedade Brasileira de Cirurgia Cardiovascular Publicador: Sociedade Brasileira de Cirurgia Cardiovascular
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
66.82%
OBJETIVO: Análise comparativa dos resultados imediatos e tardios da reconstrução da raiz da aorta com o tubo valvulado e com a preservação da valva aórtica. MÉTODOS: No período de novembro de 2002 a setembro de 2009, 164 pacientes com idade média de 54 ± 15 anos, sendo 115 do sexo masculino, foram submetidos ao tratamento cirúrgico da raiz da aorta. Foram 125 tubos valvulados e 39 reconstruções da raiz da aorta com preservação da valva aórtica. Dezesseis por cento dos pacientes eram portadores de síndrome de Marfan e 4,3% apresentavam valva aórtica bivalvulada. Cento e quarenta e quatro (88%) pacientes foram acompanhados durante tempo médio de seguimento de 41,1 ± 20,8 meses. RESULTADOS: A mortalidade hospitalar total foi de 4,9%; sendo 5,6% nas operações com tubo valvulado e 2,6% nas preservações da valva aórtica (P<0,05). Não houve diferença na sobrevida (IC 95%=86%-96%, P=0,1) e na sobrevida livre de reoperação (IC 95%=85%-90%, P=0,29). As sobrevidas livres de complicações como sangramento, tromboembolismo e endocardite foram favoráveis às operações com a preservação da valva aórtica, respectivamente (IC 95%=70%95%, P=0,001), (IC 95%=82%-95%, P=0,03) e (IC 95%=81%95%, P=0,03). A análise multivariada mostrou que a creatinina maior ou igual a 1...

Influência da doença aterosclerótica arterial coronária crítica na mortalidade hospitalar de pacientes portadores de estenose aórtica submetidos à substituição valvar; Influence of critical atherosclerotic coronary artery disease in hospital mortality of patients with aortic stenosis submitted to aortic valve replacement

Oliveira Junior, José de Lima
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 03/09/2008 PT
Relevância na Pesquisa
66.85%
Com o aumento da expectativa de vida nas últimas décadas, tem ocorrido aumento concomitante da prevalência da estenose aórtica degenerativa e da doença aterosclerótica arterial coronária. O presente estudo visa avaliar a influência da doença ateroslerótica arterial coronária crítica na mortalidade hospitalar de pacientes portadores de estenose aórtica submetidos à substituição valvar isolada ou combinada à revascularização do miocárdio. No período de janeiro de 2001 a março de 2006, no Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, foram analisados 448 pacientes submetidos à substituição valvar aórtica isolada (grupo GI) e 167 pacientes submetidos à substituição valvar aórtica combinada à revascularização do miocárdio (grupo GII). Os dados pré-operatórios eleitos para análise foram: sexo, idade, índice de massa corpórea, antecedentes de: acidente vascular cerebral, diabete melito, doença pulmonar obstrutiva crônica, febre reumática, hipertensão arterial sistêmica, endocardite, infarto agudo do miocárdio, tabagismo, fração de ejeção do ventrículo esquerdo, doença aterosclerótica arterial coronária crítica, fibrilação atrial crônica; operação valvar aórtica prévia (conservadora)...

Avaliação da fibrose miocárdica pela ressonância magnética cardíaca na doença valvar aórtica grave: validação de um algoritmo de quantificação e comparação com a histopatologia; Assessment of myocardial fibrosis by cardiac magnetic resonance imaging in severe aortic valve disease: validation of a quantitative algorithm and comparison with histopathology

Azevedo Filho, Clerio Francisco de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 05/03/2009 PT
Relevância na Pesquisa
66.82%
Introdução: A doença valvar aórtica grave é caracterizada por um processo de acúmulo progressivo de fibrose intersticial no tecido miocárdico. No contexto da sobrecarga mecânica crônica do VE característica dessa condição, a quantidade de fibrose intersticial pode exercer um papel importante na indesejável transição entre hipertrofia ventricular esquerda compensada e insuficiência cardíaca congestiva clinicamente manifesta. Entretanto, a avaliação quantitativa da fibrose intersticial só tem sido possível através da análise histopatológica de fragmentos miocárdicos obtidos por biopsia endomiocárdica. Objetivos: Avaliar se a ressonância magnética (RM) cardíaca com técnica do realce tardio permite a quantificação não-invasiva da fibrose miocárdica quando comparada à análise histopatológica em pacientes portadores de doença valvar aórtica grave. Adicionalmente, avaliou-se a relação entre a quantidade de fibrose miocárdica e parâmetros prognósticos importantes, tais como mortalidade e recuperação funcional do VE após cirurgia de troca valvar aórtica. Métodos: Entre Maio de 2001 e Dezembro de 2003 foram incluídos 54 pacientes com indicação de cirurgia de troca valvar aórtica. Antes da cirurgia...

Mechanical strain induces the production of spheroid mineralized microparticles in the aortic valve through a RhoA/ROCK-dependent mechanism

Bouchareb, Rihab; Boulanger, Marie-Chloé; Fournier, Dominique; Pibarot, Philippe; Messaddeq, Younes; Mathieu, Patrick
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 49-59
ENG
Relevância na Pesquisa
66.76%
Calcific aortic valve disease (CAVD) is a chronic disorder characterized by an abnormal mineralization of the leaflets, which is accelerated in bicuspid aortic valve (BAV). It is suspected that mechanical strain may promote/enhance mineralization of the aortic valve. However, the effect of mechanical strain and the involved pathways during mineralization of the aortic valve remains largely unknown. Valve interstitial cells (VICs) were isolated and studied under strain conditions. Human bicuspid aortic valves were examined as a model relevant to increase mechanical strain. Cyclic strain increased mineralization of VICs by several-fold. Scanning electron microscope (SEM) and energy dispersive X-ray (EDX) analyses revealed that mechanical strain promoted the formation of mineralized spheroid microparticles, which coalesced into larger structure at the surface of apoptotic VICs. Apoptosis and mineralization were closely associated with expression of ENPP1. Inhibition of ENPP1 greatly reduced mineralization of VIC cultures. Through several lines of evidence we showed that mechanical strain promoted the export of ENPP1-containing vesicles to the plasma membrane through a RhoA/ROCK pathway. Studies conducted in human BAV revealed the presence of spheroid mineralized structures along with the expression of ENPP1 in areas of high mechanical strain. Mechanical strain promotes the production and accumulation of spheroid mineralized microparticles by VICs...

Molecular evaluation of the great vessels of patients with bicuspid aortic valve disease

Leme,Mauro Paes; David,Tirone E.; Butany,Jagdish; Banerjee,Diponkar; Bastos,Eduardo S.; Provenzano,Sylvio C.; Feitosa,Leôncio A.; Murad,Henrique; Magnanini,Monica M. Ferreira
Fonte: Sociedade Brasileira de Cirurgia Cardiovascular Publicador: Sociedade Brasileira de Cirurgia Cardiovascular
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2003 EN
Relevância na Pesquisa
66.74%
PURPOSE: Bicuspid aortic valve (BAV) is associated with increased prevalence of annulo-aortic ectasia, dissection and ascending aortic aneurysm. This study was undertaken to compare the amount of fibrillin-1 and elastin in the media of great vessels of patients with bicuspid and tricuspid aortic valve disease. METHOD: Tissue samples of ascending aorta and pulmonary artery were obtained from 22 patients with bicuspid aortic valve disease (BAV) and 17 patients with tricuspid aortic valve disease (TAV), including 6 normal valves from the transplant program. Indirect immunofluorescence and computerized image analyses were used to quantify fibrillin-1 and elastin of the media of the arteries. The results were expressed as the mean integrated optical density (IOD). RESULTS: In the ascending aorta, the IOD for fibrillin-1 was 15 ± 8 in the BAV group and 24 ± 7 in the TAV group (p = 0.001). In the pulmonary artery, the IOD for fibrillin-1 was 18 ± 10 in the BAV group and 25 ± 9 in the TAV group (p = 0.07). In respect to the elastin measurements of the aorta, the specific IOD was 34 ± 13 in the BAV group and 29 ± 14 in the TAV group. In the pulmonary artery the IOD for elastin was 30 ± 12 in the BAV group and 29 ± 14 in the TAV group (p = 0.34). CONCLUSIONS: Patients with BAV were found to have less fibrillin-1 in the ascending aorta and pulmonary artery than patients with TAV. These findings may explain aortic root dilation and ascending aortic dissection in patients with BAV disease.

Reconstructive surgery of the aortic valve

Mendonça,José Teles de; Carvalho,Marcos Ramos; Costa,Rika Kakuda da; Barroso,Roberto Cardoso; Santos,José Edivaldo dos; Tavares Filho,Sérgio Costa
Fonte: Sociedade Brasileira de Cirurgia Cardiovascular Publicador: Sociedade Brasileira de Cirurgia Cardiovascular
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2003 EN
Relevância na Pesquisa
66.8%
OBJECTIVE: Lacking an ideal valve substitute and motivated by the good results of mitral valve repair since 1990, we faced with determination aortic valve reconstruction surgery. The objective of this paper is to show our experience with this procedure. METHOD: Between January of 1990 and December of 2001; 136 aortic valve repair surgeries were performed. Seventy-five (55.1%) of the patients were female and the ages ranged from 4 to 70 years (mean 23.3 ± 1.2 years). Every patient had rheumatic valve disease and insufficiency was the most prevalent type (108 patients - 79.4%), followed by double aortic lesion in 16 (11.7%) patients and stenosis in 12 (8.8%). The surgical techniques used were: subcommissural annuloplasty in 74 (54.4%) patients, commissurotomy in 38 (27.9%), cusp extension with pericardium in 17 (12.5%), substitution of one cusp in 2 (1.4%), cusp suspension by annuloplasty in 37 (27.2%) and Valsalva sinus remodeling in 27 (19.8%). The surgery exclusively involved the aortic valve in 57 (41.9%) patients and was associated in 79 (mitral valve replacement in 12, mitral repair in 65, coronary artery bypass grafting in 1 and pulmonary commissurotomy in 1). RESULTS: Hospital mortality was 2.2% and 22 (16.2%) patients underwent a new surgery during the follow-up period (57.7 ± 3.5 months). CONCLUSIONS: Aortic valve repair is a safe surgical procedure that can be used in an increasing number of patients with promising results.

Implantation of transcatheter aortic valve prosthesis through the ascending aorta concomitant with coronary artery bypass grafting without cardiopulmonary bypass

Leal,João Carlos Ferreira; Avanci,Luis Ernesto; Abelaira Filho,Achilles; Almeida,Thiago Faria; Braile,Domingo Marcolino
Fonte: Sociedade Brasileira de Cirurgia Cardiovascular Publicador: Sociedade Brasileira de Cirurgia Cardiovascular
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2014 EN
Relevância na Pesquisa
66.75%
Introdution: The transcatheter aortic valve implantation in the treatment of high-risk symptomatic aortic stenosis has increased the number of implants every year. The learning curve for transcatheter aortic valve implantation has improved since the last 12 years, allowing access alternatives. Objective: The aim of this study is to approach the implantation of transcatheter aortic valve through transaortic via associated with off-pump cardiopulmonary bypass surgery in a 67-year-old man, with chronic obstructive pulmonary disease, arterial hypertension and kidney transplant. Methods: Off-pump coronary artery bypass surgery was performed and the valve in the aortic position was released successfully. Results: There were no complications in the intraoperative and postoperative period. Gradient reduction, effective orifice increasing of the prosthesis and absence of valvular regurgitation after implantation were observed by transesophageal echocardiography. Conclusion: Procedural success demonstrates that implantation of transcatheter aortic valve through the ascending aorta associated with coronary artery bypass surgery without CPB is a new option for these patients.

The bicuspid aortic valve and its relation to aortic dilation

Yuan,Shi-Min; Jing,Hua; Lavee,Jacob
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2010 EN
Relevância na Pesquisa
66.84%
BACKGROUND: A bicuspid aortic valve (BAV) is a common congenital heart disease, which affects 1-2% of the population. However, the relationship between BAVs and aortic dilation has not been sufficiently elucidated. METHODS: A total of 241 BAV patients who were referred to this hospital for cardiac surgey over a 4.75-year period were included in this study. In addition to the clinical characteristics of the included patients, the morphological features of the aortic valve and aorta, the length of the left main coronary artery, and the laboratory findings (the coagulation and hematological parameters as well as the total cholesterol concentration) were determined and compared with those of the tricuspid aortic valve (TAV) patients. RESULTS: The BAV patients were younger than the TAV patients for a valve surgery in the last 3 months of the study period. The BAV patients were predominantly male. Most of the BAVs that were surgically treated were stenotic, regurgitant, or combined, and only 19 (7.88%) were normally functioning valves. According to echocardiography or operative records, 148 (78.31%) were type A, 31 (16.40%) were type B, and 10 (5.29%) were type C. The left main coronary artery was much shorter in the BAV patients than it was in the TAV patients. There was no significant difference between BAV and TAV patients in the total cholesterol concentrations; whereas differences were noted between patients receiving lipid-lowering therapy and those not receiving lipid-lowering therapy. The dimensions of the aortic root...

Hemodynamic Environments from Opposing Sides of Human Aortic Valve Leaflets Evoke Distinct Endothelial Phenotypes In Vitro

Weinberg, Eli J.; Mack, Peter J.; García-Cardeña, Guillermo; Kaazempur Mofrad, Mohammad R.; Schoen, Frederick Jack
Fonte: Springer US Publicador: Springer US
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
66.79%
The regulation of valvular endothelial phenotypes by the hemodynamic environments of the human aortic valve is poorly understood. The nodular lesions of calcific aortic stenosis (CAS) develop predominantly beneath the aortic surface of the valve leaflets in the valvular fibrosa layer. However, the mechanisms of this regional localization remain poorly characterized. In this study, we combine numerical simulation with in vitro experimentation to investigate the hypothesis that the previously documented differences between valve endothelial phenotypes are linked to distinct hemodynamic environments characteristic of these individual anatomical locations. A finite-element model of the aortic valve was created, describing the dynamic motion of the valve cusps and blood in the valve throughout the cardiac cycle. A fluid mesh with high resolution on the fluid boundary was used to allow accurate computation of the wall shear stresses. This model was used to compute two distinct shear stress waveforms, one for the ventricular surface and one for the aortic surface. These waveforms were then applied experimentally to cultured human endothelial cells and the expression of several pathophysiological relevant genes was assessed. Compared to endothelial cells subjected to shear stress waveforms representative of the aortic face...

Thirty years experience with heart valve surgery: isolated aortic valve replacement.

Bessell, J.; Gower, G.; Craddock, D.; Stubberfield, J.; Maddern, G.
Fonte: BLACKWELL SCIENCE Publicador: BLACKWELL SCIENCE
Tipo: Artigo de Revista Científica
Publicado em //1996 EN
Relevância na Pesquisa
66.82%
BACKGROUND: Thirty years have elapsed since the commencement of open-heart surgery in South Australia. A retrospective study was performed to evaluate mortality and complication rates and to identify factors associated with poor outcomes in all patients who underwent prosthetic aortic valve replacement during this period. METHODS: Questionnaires and personal contact have been used to generate a combined database of pre-operative and post-operative information and long-term follow-up on 1322 patients who underwent isolated prosthetic aortic valve replacement at the Cardio-Thoracic Surgical Unit of the Royal Adelaide Hospital between 1963 and 1992. RESULTS: Complete survival follow-up data were obtained for 94% (1241) of the patients. The Bjork-Shiley valve was used in 66% (875) of the patients, a Starr-Edwards prosthesis in 31% (412), a St Jude prosthesis in 2% (26), and only 0.7% (9) bioprosthetic valves were inserted. The hospital mortality rate for the 30-year period was 2.9%. Progressively older and less fit patients have undergone surgery in recent years. The long-term survival of patients with aortic stenosis and aortic incompetence was not significantly different. Long-term survival was significantly shorter for patients with higher New York Heart Association (NYHA) functional classifications...

Pathogenesis of aortic valve stenosis: bench to bedside approach.

Ngo, Doan Thi Minh
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2008
Relevância na Pesquisa
66.94%
Experiments described in this thesis address the pathogenesis of aortic valve sclerosis/stenosis using a bench to bedside approach. In particular, the thesis begins with development of a technique using ultrasonic backscatter analyses to quantitate the early stages of aortic stenosis. Subsequent chapters utilized this methodology to quantitate aortic valve structural changes in a model and intervention study of aortic stenosis in rabbits. The last chapters are human studies designed to identify factors associated with presence of aortic sclerosis/stenosis; with particular interest in potential association of endothelial dysfunction/inflammation/platelet aggregation with abnormal aortic valve structure quantitated by ultrasonic backscatter. In Chapter 1 (Introduction) the relevant literature is reviewed. Development of ultrasonic backscatter to quantitate aortic sclerosis (Chapter 2) Aortic valve sclerosis (ASc) is detected when there is visual assessment of focal increases in echogenicity of the aortic valve most commonly assessed by echocardiography. However, there is no previously described method to quantitate degree of aortic valve structural abnormality as ASc is not associated with marked hemodynamic obstruction quantifiable by Doppler echocardiography. The current study used ultrasonic backscatter to quantitate aortic valve structural abnormality in patients assessed as having ASc based on valve appearances...

Ramipril retards development of aortic valve stenosis in a rabbit model: mechanistic considerations

Ngo, D.; Stafford, I.; Sverdlov, A.; Qi, W.; Wuttke, R.; Zhang, Y.; Kelly, D.; Weedon, H.; Smith, M.; Kennedy, J.; Horowitz, J.
Fonte: Nature Publishing Group Publicador: Nature Publishing Group
Tipo: Artigo de Revista Científica
Publicado em //2011 EN
Relevância na Pesquisa
66.74%
BACKGROUND AND PURPOSE: Aortic valve stenosis (AVS) is associated with significant cardiovascular morbidity and mortality. To date, no therapeutic modality has been shown to be effective in retarding AVS progression. We evaluated the effect of angiotensin-converting enzyme inhibition with ramipril on disease progression in a recently developed rabbit model of AVS. EXPERIMENTAL APPROACH: The effects of 8 weeks of treatment with either vitamin D2 at 25 000 IU for 4 days a week alone or in combination with ramipril (0.5 mg•kg−1) on aortic valve structure and function were examined in New Zealand white rabbits. Echocardiographic aortic valve backscatter (AVBS) and aortic valve : outflow tract flow velocity ratio were utilized to quantify changes in valve structure and function. KEY RESULTS: Treatment with ramipril significantly reduced AVBS and improved aortic valve : outflow tract flow velocity ratio. The intravalvular content of the pro-oxidant thioredoxin-interacting protein was decreased significantly with ramipril treatment. Endothelial function, as measured by asymmetric dimethylarginine concentrations and vascular responses to ACh, was improved significantly with ramipril treatment. CONCLUSIONS AND IMPLICATIONS: Ramipril retards the development of AVS...

Interactions between inflammatory activation and endothelial dysfunction selectively modulate valve disease progression in patients with bicuspid aortic valve

Ali, O.A.; Chapman, M.; Thanh, H.N.; Chirkov, Y.Y.; Heresztyn, T.; Mundisugih, J.; Horowitz, J.D.
Fonte: BMJ Publishing Group Publicador: BMJ Publishing Group
Tipo: Artigo de Revista Científica
Publicado em //2014 EN
Relevância na Pesquisa
66.76%
OBJECTIVES: Bicuspid aortic valve (BAV) is associated with increased risk of valvular degeneration and ascending aortic aneurysm formation and rupture. We sought to evaluate the roles of endothelial dysfunction and inflammatory activation in modulating these processes. METHODS: We performed a case-control study of patients with BAV together with a multivariate analysis within the BAV group to identify factors associated with: development of significant valvular disease; dilatation of the ascending aorta; differential valve relative to aortic disease. Endothelial function of patients and controls was evaluated via flow-mediated dilatation (FMD) and plasma concentrations of asymmetric dimethylarginine (ADMA). Correlations with inflammatory markers and endothelial progenitor cell counts were also examined. Morphological and physiological assessment of the valve and ascending aorta was performed with transthoracic echocardiography and MRI. RESULTS: Patients with BAV (n=43) and controls (n=25) were matched for age and gender. FMD was significantly lower in patients than controls (7.85±3.48% vs 11.58±3.98%, p=0.001), and these differences were age-independent. Within the BAV cohort, multivariate correlates of peak aortic valve velocity were plasma concentrations of ADMA and myeloperoxidase (MPO) (both p<0.01)...

Early effects of transcatheter aortic valve implantation and aortic valve replacement on myocardial function and aortic valve hemodynamics: insights from cardiovascular magnetic resonance imaging

Crouch, G.; Bennetts, J.; Sinhal, A.; Tully, P.J.; Leong, D.P.; Bradbrook, C.; Penhall, A.L.; De Pasquale, C.G.; Chakrabarty, A.; Baker, R.A.; Selvanayagam, J.B.
Fonte: Mosby Publicador: Mosby
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
Relevância na Pesquisa
66.83%
OBJECTIVES: There remains a paucity of mechanistic data on the effect of transcatheter aortic valve implantation (TAVI) on early left and right ventricular function and quantitative aortic valve regurgitation. We sought to assess and compare the early effects on myocardial function and aortic valve hemodynamics of TAVI and aortic valve replacement (AVR) using serial cardiovascular magnetic resonance (CMR) imaging and echocardiography. METHODS: A prospective comparison study of 47 patients with severe aortic stenosis undergoing either TAVI (n = 26) or high-risk AVR (n = 21). CMR (for left ventricle/right ventricle function, left ventricular mass, left atrial volume, and aortic regurgitation) was carried out before the procedure and early postprocedure (<14 days). RESULTS: Groups were similar with respect to Society of Thoracic Surgeons score (TAVI, 7.7 vs AVR, 5.9; P = .11). Preoperative left ventricular (TAVI, 69% ± 13% vs AVR, 73% ± 10%; P = .10) and right ventricular (TAVI, 61% ± 11% vs AVR, 59% ± 8%; P = .5) ejection fractions were similar. Postoperative left ventricular ejection fraction was preserved in both groups. In contrast, decline in right ventricular ejection fraction was more significant in the TAVI group (61%-54% vs 59%-58%; P = .01). Postprocedure aortic regurgitant fraction was significantly greater in the TAVI group (16% vs 4%; P = .001)...

Change in quality of life after transcatheter aortic valve implantation and aortic valve replacement surgery in Australian patients aged ≥ 75 years: the effects of EuroSCORE and patient operability; Change in quality of life after transcatheter aortic valve implantation and aortic valve replacement surgery in Australian patients aged >/- 75 years: the effects of EuroSCORE and patient operability

Tully, P.J.; Roshan, P.; Rice, G.D.; Sinhal, A.; Bennetts, J.S.; Baker, R.A.
Fonte: Science Press Publicador: Science Press
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
Relevância na Pesquisa
66.8%
OBJECTIVE: To determine the extent to which differences in generic quality of life (QOL) between transcatheter aortic valve implantation (TAVI) and surgical aortic valve replacement (AVR) patients explained by EuroSCORE and heart-team operability assessment. METHODS: A total of 146 high-risk patients with EuroSCORE > 6 and aged ≥ 75 years underwent TAVI (n = 80) or aortic valve replacement (n = 66) between February 2010 and July 2013. A total of 75 patients also completed preoperative and six month SF-12 QOL measures. Analyses examined incident major morbidity, compared six month QOL between groups adjusted for EuroSCORE and operability, and quantified rates of clinically significant QOL improvement and deterioration. RESULTS: The AVR group required longer ventilation (> 24 h) (TAVI 5.0% vs. AVR 20.6%, P = 0.004) and more units of red blood cells [TAVI 0 (0-1) vs. AVR 2 (0-3), P = 0.01]. New renal failure was higher in TAVI (TAVI 5.0% vs. AVR 0%, P = 0.06). TAVI patients reported significantly lower vitality (P = 0.01) by comparison to AVR patients, however these findings were no longer significant after adjustment for operability. In both procedures, clinically significant QOL improvement was common [range 25.0% (general health) - 62.9% (physical role)] whereas deterioration in QOL occurred less frequently [range 9.3% (physical role) - 33.3% (mental health)]. CONCLUSIONS: Clinically significant improvement and deterioration in QOL was evident at six months in high risk elderly aortic valve replacement patients. Overall QOL did not differ between TAVI and AVR once operability was taken into consideration.; Phillip J Tully...

Prognostische Relevanz einer leicht- bis mittelgradigen pulmonalen Hypertonie bei Patienten mit hochgradiger Aortenklappenstenose vor konventionellem Aortenklappenersatz; Prognostic relevance of mild-to-moderate pulmonary hypertension in patients with severe aortic valve stenosis undergoing surgical aortic valve replacement

Woernle, Barbara Raphaela
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: Dissertação
DE_DE
Relevância na Pesquisa
66.9%
Die Aortenklappenstenose stellt mit einer Prävalenz von 2,5% bei Patienten jenseits des 65. Lebensjahres das häufigste erworbene Herzklappenvitium in der westlichen Welt dar. Die effektive Therapie der Aortenklappenstenose besteht im operativen oder katheterinterventionellen Aortenklappenersatz. Die Wahl des optimalen Zeitpunktes des Aortenklappenersatz stellt jedoch trotz Vorliegen etablierter Risikofaktoren, vor allem bei älteren oligosymptomatischen Patienten eine Herausforderung im klinischen Alltag dar. Andererseits verstirbt ein kleiner, aber relevanter Anteil an Patienten trotz primär erfolgreichem Aortenklappenersatz. Daher ist die Identifikation von sensitiven Risikoparametern bei Patienten mit Aortenklappenstenose von großem klinischen Wert. Im Verlauf der Aortenklappenstenose kommt es bereits in frühen Stadien durch Obstruktion der Klappe, Steigerung der Nachlast und Erhöhung des linksventrikulären Füllungsdruckes zu einer Zunahme des pulmonalen Drucks. Zunächst erfolgt ein passiver Rückstau in die Lungengefäße, später entwickelt sich eine eigenständige, fixierte pulmonalarterielle Hypertonie. Ein bereits leicht- bis mittelgradiger Anstieg des systolischen pulmonalarteriellen Drucks könnte somit ein subklinisches Zeichen einer beginnenden Dekompensation bei der Aortenklappenstenose darstellen...

Transcatheter aortic valve implantation with balloonexpandable valve: early experience from China

Lu,Qingsheng; Pei,Yifei; Wu,Hong; Wang,Zhinong; Zaiping,Jing
Fonte: Sociedade Brasileira de Cirurgia Cardiovascular Publicador: Sociedade Brasileira de Cirurgia Cardiovascular
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2015 EN
Relevância na Pesquisa
66.84%
AbstractObjective:The aim of the current study was to evaluate the early experience of the application of transcatheter aortic valve implantation with the balloon-expandable system in China. The transcatheter aortic valve implantation technology has been widely used for patients with inoperable severe aortic stenosis in the developed world. The application of transcatheter aortic valve implantation is still in the early stages of testing in China, particularly for the balloon-expandable valve procedure.Methods:This was a retrospective study. All patients undergoing transcatheter aortic valve implantation with balloon-expandable system in our hospital between 2011 and 2014 were included. Edwards SAPIEN XT Transcatheter Heart Valve was used. The improvement of valve and heart function was evaluated as well as 30-day mortality and major complications according to the VARC-2 definition.Results:A total of 10 transcatheter aortic valve implantation procedures with the balloon-expandable system were performed in our hospital, of which 9 were transfemoral and 1 was transapical. The median age was 76 years, and the median STS score and Logistic EuroSCORE (%) were 8.9 and 16.2. The implantation was successfully conducted in all patients, only 2 patients had mild paravalvular leak. There was no second valve implantation. Moreover...

The bicuspid aortic valve and related disorders

Yuan,Shi-Min; Jing,Hua
Fonte: Associação Paulista de Medicina - APM Publicador: Associação Paulista de Medicina - APM
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2010 EN
Relevância na Pesquisa
66.75%
Bicuspid aortic valve (BAV) is the most common congenital cardiac malformation, affecting 1-2% of the population, with strong male predominance. Individuals may have a normally functioning BAV, and may be unaware of its presence and the potential risk of complications. However, they may easily develop aortic valve disorders: either stenotic or regurgitant, or both. Today, BAV is recognized as a syndrome incorporating aortic valve disorders and aortic wall abnormalities, including aortic dilation, dissection or rupture. Congenital or hereditary diseases such as ventricular septal defect, patent ductus arteriosus, coarctation of the aorta, Turner's syndrome, Marfan's syndrome etc., may frequently be associated with BAV. Infective endocarditis and occasionally thrombus formation may develop during the lives of BAV patients. Elevated cholesterol or C-reactive protein may be seen in laboratory findings of these patients. Beta-blockers and statins are the possibilities for medical treatment, and aortic valve repair/replacement and ascending aorta replacement are indicated for patients with a severely diseased aortic valve and aorta. Rigorous follow-up throughout life is mandatory after BAV has been diagnosed. The aim of the present article was to describe the implications of BAV and its associated disorders...

The bicuspid aortic valve and its relation to aortic dilation

Yuan, Shi-Min; Jing, Hua; Lavee, Jacob
Fonte: Universidade de São Paulo. Faculdade de Medicina Publicador: Universidade de São Paulo. Faculdade de Medicina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; ; Formato: application/pdf
Publicado em 01/01/2010 ENG
Relevância na Pesquisa
66.84%
BACKGROUND: A bicuspid aortic valve (BAV) is a common congenital heart disease, which affects 1-2% of the population. However, the relationship between BAVs and aortic dilation has not been sufficiently elucidated. METHODS: A total of 241 BAV patients who were referred to this hospital for cardiac surgey over a 4.75-year period were included in this study. In addition to the clinical characteristics of the included patients, the morphological features of the aortic valve and aorta, the length of the left main coronary artery, and the laboratory findings (the coagulation and hematological parameters as well as the total cholesterol concentration) were determined and compared with those of the tricuspid aortic valve (TAV) patients. RESULTS: The BAV patients were younger than the TAV patients for a valve surgery in the last 3 months of the study period. The BAV patients were predominantly male. Most of the BAVs that were surgically treated were stenotic, regurgitant, or combined, and only 19 (7.88%) were normally functioning valves. According to echocardiography or operative records, 148 (78.31%) were type A, 31 (16.40%) were type B, and 10 (5.29%) were type C. The left main coronary artery was much shorter in the BAV patients than it was in the TAV patients. There was no significant difference between BAV and TAV patients in the total cholesterol concentrations; whereas differences were noted between patients receiving lipid-lowering therapy and those not receiving lipid-lowering therapy. The dimensions of the aortic root...

Aortic valve performance with transaortic ventricular cannula

Cezo, James
Fonte: Rochester Instituto de Tecnologia Publicador: Rochester Instituto de Tecnologia
Tipo: Tese de Doutorado
EN_US
Relevância na Pesquisa
66.82%
A novel transaortic ventricular cannula, known as the 'double barrel' cannula (DBC), is designed to minimize the invasiveness of Ventricular Assist Device (VAD) implantation by combining the inlet and outlet cannulae into a single dual lumen cannula. Both the inlet and outlet lumen will pass through a single opening in the apex of the left ventricle with the outflow then continuing past the aortic valve, into the aortic arch. This design offers several potential advantages over the current state of-the-art. The benefits of the DBC include less invasive surgery and providing mechanical support to the septum. By routing the outflow through the aortic valve, the need to access the external structure of the ascending aorta at the time of implantation is eliminated thereby eliminating the need for open heart surgery. In designing the DBC, close attention has been paid to the outflow portion of the cannula since it was anticipated that this portion of the DBC could have the largest impact on the device's usability. The object of this study was to test the performance of the valve with the cannula passing through it. Three different geometries of similar cross-sectional area were compared. The geometries were circular, equilateral triangular...