keyword
https://read.qxmd.com/read/19154907/a-20-year-experience-of-1712-patients-with-the-biocor-porcine-bioprosthesis
#21
JOURNAL ARTICLE
Pia S U Mykén, Odd Bech-Hansen
OBJECTIVE: The 20-year data from the ongoing long-term study of the St Jude Medical Biocor (St Jude Medical, St Paul, Minn) porcine bioprosthesis are reported. Earlier follow-ups have shown that the valve has excellent durability. After 20 years, will this continue to be true? METHODS: Data were obtained for 1712 patients who underwent valve replacement (1518 aortic valve replacements; 194 mitral valve replacements) with glutaraldehyde-preserved Biocor bioprostheses at Sahlgrenska University Hospital (Sweden) between 1983 and 2003...
January 2009: Journal of Thoracic and Cardiovascular Surgery
https://read.qxmd.com/read/18993160/doppler-catheter-discrepancies-in-patients-with-bileaflet-mechanical-prostheses-or-bioprostheses-in-the-aortic-valve-position
#22
COMPARATIVE STUDY
Obaid Aljassim, Gunnar Svensson, Erik Houltz, Odd Bech-Hanssen
The aims of the present study were to investigate in vivo Doppler-catheter discrepancies in aortic bileaflet mechanical and stented biologic valves and evaluate whether these can be predicted using Doppler echocardiography. Results of in vitro studies of bileaflet mechanical valves suggested overestimation using Doppler gradients. Findings in stented biologic valves were conflicting. Patients who underwent valve replacement with a St. Jude Medical mechanical (n = 14, size 19 to 29) or a St. Jude Medical Biocor (Biocor, n = 13, size 21 to 25) valve were included...
November 15, 2008: American Journal of Cardiology
https://read.qxmd.com/read/18805161/twenty-year-experience-with-the-st-jude-medical-biocor-bioprosthesis-in-the-aortic-position
#23
JOURNAL ARTICLE
Walter B Eichinger, Ina M Hettich, Daniel J Ruzicka, Klaus Holper, Carolin Schricker, Sabine Bleiziffer, Ruediger Lange
BACKGROUND: The purpose of this study was to evaluate the long-term performance of the St. Jude Medical Biocor stented porcine prosthesis in the aortic position. METHODS: From January 1985 to December 1996, 455 patients admitted for aortic valve replacement were consecutively enrolled in this study. The mean age was 72.5 +/- 9 years, 18 patients (3.5%) had had previous cardiac surgery, and coronary artery bypass grafting was performed in 171 patients (37.6%). Follow-up was complete in 99...
October 2008: Annals of Thoracic Surgery
https://read.qxmd.com/read/18628343/the-changing-spectrum-of-bioprostheses-hydrodynamic-performance-considerations-on-in-vitro-tests
#24
COMPARATIVE STUDY
Tomaso Bottio, Vincenzo Tarzia, Giulio Rizzoli, Gino Gerosa
The aims of the present study were to compare hydrodynamics of three pericardial and two porcine valves while performing at different stroke volume (SV) and increasing pulse rate (PR). Carpentier-Edwards Magna-21 (CEM), Sorin Soprano-20 (SS), Mitroflow-23 (MF), SJM-Biocor-Epic-Supra-21 (SJME), and Medtronic Mosaic Ultra-23 (MMU) were tested in the aortic chamber (23-mm in diameter) of the Sheffield-Pulse-Duplicator. The tests were carried out at increasing pulse-rate and at each pulse-rate the valve was tested at different SV...
October 2008: Interactive Cardiovascular and Thoracic Surgery
https://read.qxmd.com/read/17874018/hospital-risk-factors-for-bovine-pericardial-bioprosthesis-valve-implantation
#25
JOURNAL ARTICLE
Mateus W De Bacco, João Ricardo M Sant'Anna, Gustavo De Bacco, Roberto T Sant'Anna, Marisa F Santos, Edemar Pereira, Altamiro Reis da Costa, Paulo Roberto Prates, Renato A K Kalil, Ivo A Nesralla
BACKGROUND: Identification of preoperative heart valve surgery risk factors aim to improve surgical outcomes with the possibility to offset conditions related to increased morbidity and mortality. OBJECTIVE: Intent of this study is to identify hospital risk factors in patients undergoing bovine pericardial bioprosthesis implantation. METHODS: Retrospective study including 703 consecutive patients who underwent implantation of at least one St...
August 2007: Arquivos Brasileiros de Cardiologia
https://read.qxmd.com/read/17588387/meta-analysis-of-valve-hemodynamics-and-left-ventricular-mass-regression-for-stentless-versus-stented-aortic-valves
#26
COMPARATIVE STUDY
Babu Kunadian, Kunadian Vijayalakshmi, Andrew R Thornley, Mark A de Belder, Steven Hunter, Simon Kendall, Richard Graham, Michael Stewart, Jeetendra Thambyrajah, Joel Dunning
BACKGROUND: Stentless aortic bioprostheses have been advocated as being superior to conventional bioprosthetic valves, with benefits including superior left ventricular mass regression and larger effective orifice area. Several high-quality randomized studies now exist on this topic, and we sought to summarize them by meta-analysis. METHODS: The literature was searched from 1995 to 2006, in MEDLINE, EMBASE, CRISP, metaRegister of Controlled Trials, and the Cochrane database...
July 2007: Annals of Thoracic Surgery
https://read.qxmd.com/read/17152783/long-term-follow-up-of-the-biocor-porcine-bioprosthesis-in-the-mitral-position
#27
JOURNAL ARTICLE
Pablo M A Pomerantzeff, Carlos M A Brandão, João M A C Albuquerque, Noedir A G Stolf, Max Grinberg, Sérgio A Oliveira
BACKGROUND AND AIM OF THE STUDY: The study aim was to review the long-term results of mitral valve replacement (MVR) with the Biocor porcine bioprosthesis, in order to investigate patient survival and valve-related complications. METHODS: Data were presented for 546 patients (320 females, 226 males; mean age 49.2 +/- 17.1 years) who underwent MVR with the Biocor porcine bioprosthesis between March 1983 and December 2000. Preoperatively, rheumatic fever was present in 42...
November 2006: Journal of Heart Valve Disease
https://read.qxmd.com/read/17059917/commissural-dehiscence-a-rare-and-peculiar-cause-of-porcine-valve-structural-deterioration
#28
JOURNAL ARTICLE
Tomaso Bottio, Marialuisa Valente, Giulio Rizzoli, Vincenzo Tarzia, Gianluigi Bisleri, Elena Pettenazzo, Gino Gerosa, Gaetano Thiene
OBJECTIVE: Calcification is the main cause of structural valve deterioration; however, other causes of failure have been identified, and among them, dehiscence of a commissure from the stent has been reported in several models of porcine valves. The aim of this study was to analyze the rate and mode of occurrence of this complication in first- and second-generation porcine bioprosthetic explants. METHODS: Among 586 porcine xenografts explanted and analyzed at the Institute of Pathological Anatomy of the University of Padua, 17 (2...
November 2006: Journal of Thoracic and Cardiovascular Surgery
https://read.qxmd.com/read/16798664/impact-of-hypertension-on-left-ventricular-hypertrophy-regression-and-exercise-capacity-in-patients-operated-for-aortic-valve-stenosis
#29
JOURNAL ARTICLE
Dana Cramariuc, Eva Gerdts, Leidulf Segadal
OBJECTIVES: To assess the influence of concomitant hypertension on left ventricular hypertrophy regression and exercise capacity in patients operated for aortic stenosis. DESIGN: We performed echocardiography 1 week, 6- and 18-month postoperatively in 78 patients, aged 70 (28-86) years, who received Medtronic Hall (33), Biocor (8), Carpentier-Edwards S.A.V. (14) and Freestyle (23) prosthetic valves for severe aortic stenosis. Forty nine patients participated in treadmill tests with ergospirometry at the 6- and 18-month visits...
June 2006: Scandinavian Cardiovascular Journal: SCJ
https://read.qxmd.com/read/16678590/small-aortic-annulus-the-hydrodynamic-performances-of-5-commercially-available-tissue-valves
#30
COMPARATIVE STUDY
Gino Gerosa, Vincenzo Tarzia, Giulio Rizzoli, Tomaso Bottio
BACKGROUND: In vivo comparison of the performance of heart valve prostheses is confounded by several factors, such as different nominal size, patients' characteristics and hemodynamics, surgical techniques, and study design. The aim of this study was to compare the in vitro hydrodynamic performances of 5 different tissue valves that would fit a 21-mm-diameter valve holder of the Sheffield pulse duplicator. METHODS: Three samples of 5 supra-annular production-quality tissue valves, including the sewing ring cuffs, were tested in the aortic chamber of the Sheffield pulse duplicator...
May 2006: Journal of Thoracic and Cardiovascular Surgery
https://read.qxmd.com/read/16116875/seventeen-year-experience-with-the-st-jude-medical-biocor-porcine-bioprosthesis
#31
JOURNAL ARTICLE
Pia S Mykén
BACKGROUND AND AIM OF THE STUDY: Bioprostheses in heart surgery have been investigated in recent years to reduce the long-term anticoagulant administration associated with mechanical devices. Positive results have been achieved, particularly in elderly patients who have a supposed delayed fibrocalcification and reduced life expectancy. Herein are reported 17-year data on the ongoing long-term study of the Biocor porcine prosthetic heart valve, an improved bioprosthesis with reduced stiffness and improved flexibility of the valve cusps designed to resolve issues of reduced lifespan of previous biological valves...
July 2005: Journal of Heart Valve Disease
https://read.qxmd.com/read/15796330/time-resolved-dpiv-analysis-of-vortex-dynamics-in-a-left-ventricular-model-through-bileaflet-mechanical-and-porcine-heart-valve-prostheses
#32
COMPARATIVE STUDY
Olga Pierrakos, Pavios P Vlachos, Demetri P Telionis
The performance of the heart after a mitral valve replacement operation greatly depends on the flow character downstream of the valve. The design and implanting orientation of valves may considerably affect the flow development. A study of the hemodynamics of two orientations, anatomical and anti-anatomical, of the St. Jude Medical (SJM) bileaflet valve are presented and compared with those of the SJM Biocor porcine valve, which served also to represent the natural valve. We document the velocity field in a flexible, transparent (LV) using time-resolved digital particle image velocimetry (TRDPIV)...
December 2004: Journal of Biomechanical Engineering
https://read.qxmd.com/read/15678042/intermediate-results-of-isolated-mitral-valve-replacement-with-a-biocor-porcine-valve
#33
COMPARATIVE STUDY
Giulio Rizzoli, Tomaso Bottio, Vladimiro Vida, Georgios Nesseris, Luca Caprili, Gaetano Thiene, Gino Gerosa
BACKGROUND: We analyzed the intermediate experience, survival, and prosthetic complications of patients who received the Biocor valve, a new-generation porcine valve, in the mitral position. METHODS: At the University of Padua, between May 1992 and January 2004, 154 consecutive patients (102 female and 52 male patients; mean age, 72.3 +/- 6 years; age range, 37-86 years) received 158 mitral Biocor prostheses (Biocor Industria e Pesguisa Ltda, Belo Horizonte, Brazil)...
February 2005: Journal of Thoracic and Cardiovascular Surgery
https://read.qxmd.com/read/15173715/hemodynamic-and-clinical-outcomes-with-the-biocor-valve-in-the-aortic-position-an-8-year-experience
#34
COMPARATIVE STUDY
Tomaso Bottio, Giulio Rizzoli, Gaetano Thiene, Georgios Nesseris, Dino Casarotto, Gino Gerosa
OBJECTIVES: The aim of this study was to analyze the 8-year experience, survival, prosthetic complications, and hemodynamics of patients who received the Biocor valve, a new-generation tissue valve, in the aortic position. METHODS: From May 1992 through May 2001, 257 consecutive patients (129 women and 128 men; mean age, 75 +/- 6 years; age range, 45-91 years) received 258 aortic Biocor porcine prostheses. One female patient who received 2 Biocor valves in the aortic position during 2 consecutive operations was entered twice in the statistical analysis...
June 2004: Journal of Thoracic and Cardiovascular Surgery
https://read.qxmd.com/read/12878995/net-pressure-gradients-in-aortic-prosthetic-valves-can-be-estimated-by-doppler
#35
COMPARATIVE STUDY
Odd Bech-Hanssen, Peter Gjertsson, Erik Houltz, Bengt Wranne, Per Ask, Dan Loyd, Kenneth Caidahl
BACKGROUND: In aortic prosthetic valves, both the Doppler-estimated gradients and orifice areas are misleading in the assessment of hemodynamic performance. The parameter of major interest is the net pressure gradient after pressure recovery (PR). We, therefore, investigated, in vitro, our ability to predict the net pressure gradient and applied the formulas in a representative patient population with 2 different valve designs. METHODS: We studied the St Jude Medical (SJM) standard valve (size 19-27) and SJM Biocor (size 21-27) in an in vitro steady-flow model with simultaneous Doppler-estimated pressure and catheter pressure measurements...
August 2003: Journal of the American Society of Echocardiography
https://read.qxmd.com/read/12467813/eleven-years-experience-with-the-biocor-stentless-aortic-bioprosthesis-clinical-and-hemodynamic-follow-up-with-long-term-relative-survival-rate
#36
JOURNAL ARTICLE
Göran Dellgren, M J Eriksson, L A Brodin, K Rådegran
OBJECTIVE: The long-term durability and hemodynamics of stentless valves are largely unknown. Our aim was to prospectively investigate long-term hemodynamic function and clinical outcome after aortic valve replacement with the Biocor stentless aortic bioprosthesis. PATIENTS AND METHODS: Between October 1990 and November 2000 we inserted the Biocor stentless aortic valve in 112 patients (male/female: 38:74) with a mean age of 78.5 years (median 79.3, range 60-88)...
December 2002: European Journal of Cardio-thoracic Surgery
https://read.qxmd.com/read/12238259/-is-a-bioprosthesis-with-a-rigid-stent-a-good-choice-for-aortic-valve-replacement-in-elderly-patients
#37
JOURNAL ARTICLE
M Setina, D Cocek, H Pospísilová, A Mokrácek, M Vambera, F Tousek
BACKGROUND: Either stented or stentless bioprostheses can be used for aortic valve replacement (AVR) in aged patients. However the choice of the valve type remains controversial. The implantation technique of the stentless valves is more complex but the haemodynamic performance supposed to be superficial to the stented ones. The aim of the study was to review our experience with stented bioprostheses implanted in the last year. MATERIAL AND METHODS: The study reviews retrospectively 35 patients who underwent AVR with Biocor fy St Jude Medical from May 2000 to May 2001...
August 2002: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://read.qxmd.com/read/12172862/unexpected-mechanical-bileaflet-valve-thrombosis-in-mitral-position-what-is-better-to-do-re-replacement-or-thrombolysis
#38
JOURNAL ARTICLE
T Bottio, G Gerosa, C Basso, G Thiene, D C Casarotto
BACKGROUND AND AIMS: The longevity of the mechanical heart valve prosthesis is an advantage when compared with its biological counterpart, although the former carries a risk of thrombosis depending on valve design, materials and host-related interface; therefore, a patient with a mechanical valve prosthesis, particularly in mitral position, is at risk for systemic thromboembolism even when properly anticoagulated. PATIENTS AND METHODS: We report a case of a 60-year-old woman who underwent a mitral valve replacement with a St...
July 2002: Langenbeck's Archives of Surgery
https://read.qxmd.com/read/12044432/mid-term-follow-up-in-patients-with-biocor-porcine-bioprostheses
#39
JOURNAL ARTICLE
Tomaso Bottio, Giulio Rizzoli, Gino Gerosa, Gaetano Thiene, Dino Casarotto
BACKGROUND: Prosthetic cardiac valves have increased life expectancy of patients (pts) with valvular heart disease. Bioprosthetic complications required devices replacements within 10 years of implantation; structural valve deterioration (SVD) has emerged as the major cause of reoperation. We reviewed survival and prosthetic complications of Biocor porcine bioprostheses implanted in mitral, aortic and mitro-aortic position. METHODS: Between January 1991 and January 2001 446 pts (192 males; 254 females; mean age 73...
June 2002: Cardiovascular Surgery: Official Journal of the International Society for Cardiovascular Surgery
https://read.qxmd.com/read/11843505/long-term-results-with-the-biocor-sjm-stentless-porcine-aortic-bioprosthesis
#40
JOURNAL ARTICLE
Mario Vrandecic, Fernando Antonio Fantini, Bayard Gontijo Filho, OliveiraOzananCésar de, CostaJúniorIdailMartins da, Erika Vrandecic
BACKGROUND AND AIM OF THE STUDY: The study aim was to update the clinical analysis of hemodynamic performance, structural failure and survival in patients undergoing aortic valve replacement (AVR) with a composite aortic, aldehyde tanned, stentless porcine bioprosthesis. METHODS: Between January 1990 and March 2001, 247 patients underwent AVR with aortic stentless valves. Patient demographic and clinical analysis included age, sex, valve lesion, valve size, pre- and postoperative NYHA class, hospital morbidity, mortality, operative data and duration of hospitalization...
January 2002: Journal of Heart Valve Disease
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