HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Personal Folders Download to citation manager Permission Requests Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Gonzalez-Juanatey, J. R. Articles by Gil de la Pena, M. Search for Related Content PubMed PubMed Citation Articles by Gonzalez-Juanatey, J. R. Articles by Gil de la Pena, M.

European Journal of Cardio-Thoracic Surgery, Vol 10, 201-206, Copyright © 1996 by European Association for Cardio-thoracic Surgery

ARTICLES

Hemodynamics of various designs of 19 mm pericardial aortic valve bioprosthesis

JR Gonzalez-Juanatey, JM Garcia-Acuna, M Vega Fernandez, A Amaro Cendon, V Castelo Fuentes, JB Garcia-Bengoechea and M Gil de la Pena
Department of Cardiology, Galician General Hospital, Santiago de Compostela, Spain.

The hemodynamics of five designs of 19 mm pericardial aortic valve bioprostheses were examined in 47 resting patients by Doppler echocardiography. The salient differences among the five designs are that valve leaflets are mounted inside the support frame in one (the Carpentier-Edwards valve, evaluated in 4 patients) and outside the frame in the other four (the Ionescu-Shiley (16 patients), Mitroflow (4), Bioflo (8) and Labcor-Santiago (15)); and that two models have either total (Bioflo) or partial (Labcor-Santiago) protective pericardial sheaths on the stent, while the other three do not. The hemodynamic parameters determined included transvalvular pressure drop, valve area, left ventricular outflow tract diameter, subvalvular/valvular velocity ratio and subvalvular/valvular velocity- time integral ratio. There were no significant differences among the various valves as regards left ventricular outflow tract diameter, subvalvular/valvular velocity ratio or subvalvular/valvular velocity- time integral ratio. Negative correlation between left ventricular outflow tract diameter and subvalvular velocity (r = -0.66, P < 0.001) confirmed the need to correct for prevalvular velocities when using the Bernouilli equation to calculate the pressure drop across small pericardial aortic valve bioprostheses. The Bioflo design caused significantly greater pressure drops (peak 38.3 +/- 8.3 mmHg, mean 24.6 +/- 4.8 mmHg) and smaller areas (0.82 +/- 0.17 cm2) than the Ionescu- Shiley (20.3 +/- 5.6 and 11.7 +/- 3.8 mmHg, 1.19 +/- 5.3 and 10.1 +/- 3.1 mmHg, 1.27 +/- 0.12 cm2) valves.

This article has been cited by other articles:

				J R Gonzalez-Juanatey, M V Fernandez, F G Sampedro, J M Garcia-Acuna, J B Garcia-Bengoechea, A A Cendon, and M G de la Pena Haemodynamic performance of aortic pericardial bioprostheses and bileaflet prostheses at rest and during exercise: implications for the surgical management of patients with small aortic roots Heart, August 1, 1999; 82(2): 149 - 155. [Abstract] [Full Text] [PDF]

				V. Rao, G. T. Christakis, J. Sever, S. E. Fremes, G. Bhatnagar, G. Cohen, M. A. Borger, L. Abouzahr, and B. S. Goldman A NOVEL COMPARISON OF STENTLESS VERSUS STENTED VALVES IN THE SMALL AORTIC ROOT J. Thorac. Cardiovasc. Surg., March 1, 1999; 117(3): 431 - 438. [Abstract] [Full Text] [PDF]

				J. R. Gonzalez-Juanatey Assessment of the hemodynamic performance of small-size aortic valve prostheses J. Thorac. Cardiovasc. Surg., June 1, 1997; 113(6): 1122 - 1123. [Full Text]