Hemodynamic Performance of the 21-mm St. Jude BioImplant Prosthesis Using Dobutamine Doppler Echocardiography

This study examines the hemodynamic performance of small size St. Jude BioImplant aortic prostheses using dobutamine echocardiography. Eleven patients (3 women, mean age 75 years) who had undergone aortic valve replacement with a size 21-mm St. Jude BioImplant aortic prostheses at 10.8 ± 5.1 months...

Full description

Saved in:
Bibliographic Details
Published in:The American journal of cardiology 1998-03, Vol.81 (5), p.599-603
Main Authors: Kadir, Isaac, Izzat, Mohammed Bashar, Birdi, Inderpaul, Wilde, Peter, Reeves, Barnaby, Walsh, Catherine, Bryan, Alan, Angelini, Gianni
Format: Article
Language:English
Subjects:
Adrenergic beta-Agonists - pharmacology
Aged
Aged, 80 and over
Aortic Valve - surgery
Biological and medical sciences
Bioprosthesis
Cardiac Output - drug effects
Cardiology
Dobutamine - pharmacology
Echocardiography, Doppler
Electrocardiography
Evaluation Studies as Topic
Female
Heart
Heart Valve Prosthesis
Hemodynamics
Humans
Male
Medical sciences
Prostheses
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Surgery of the heart
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study examines the hemodynamic performance of small size St. Jude BioImplant aortic prostheses using dobutamine echocardiography. Eleven patients (3 women, mean age 75 years) who had undergone aortic valve replacement with a size 21-mm St. Jude BioImplant aortic prostheses at 10.8 ± 5.1 months (SD) previously were studied. Dobutamine infusion was started at a rate of 5 μg/kg/min and increased to 10 μg/kg/min, and subsequently to 20 μg/kg/min at 15-minute intervals. Pulsed and continuous-wave Doppler studies were performed at rest and at the end of each stage. Effective orifice area, mean gradient, and the performance index across each prosthesis were calculated and cardiac output was determined by Doppler measurement of flow in the left ventricular outflow tract. Stress dobutamine increased heart rate and cardiac output by 51% and 56%, respectively (both p
ISSN:0002-9149
1879-1913
DOI:10.1016/S0002-9149(97)00968-5