Effects of dobutamine on aortic valve indexes in asymptomatic patients with bileaflet mechanical prostheses in the aortic valve position.
We investigated the effects of alternating transvalvular flow rate on Doppler-derived aortic valve resistance and valve area in asymptomatic patients with mechanical aortic valve replacement under dobutamine infusion. The Gorlin-derived aortic valve area and continuity equation-derived aortic valve area seem to be less flow dependent; valve resistance tends to be flow dependent.
Tsai
C H
CH
Center for Cardiovascular Research, College of Medicine, National Taiwan University, Taipei.
Lee
T M
TM
Wang
C H
CH
Hsu
K L
KL
Liau
C S
CS
Lee
Y T
YT
Chu
S H
SH
D000318:Adrenergic beta-Agonists / Q000494:pharmacology*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001021:Aortic Valve / Q000000981:diagnostic imaging / Q000187:drug effects* / Q000503:physiopathology*; D001783:Blood Flow Velocity / Q000187:drug effects; D004280:Dobutamine / Q000494:pharmacology*; D015150:Echocardiography, Doppler; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged
D000318:Adrenergic beta-Agonists; D004280:Dobutamine