Paradoxic improvement in regional wall motion during high-dose dobutamine stress echocardiography. A marker for hibernating myocardium?
Dobutamine stress echocardiography detects myocardial ischemia by inducing regional left ventricular systolic dysfunction. Augmentation of wall motion in hypokinetic segments has also been noted with low-dose dobutamine, suggesting myocardial viability. We report a case of regional ventricular improvement during high-dose dobutamine therapy, which may represent relief from myocardial hibernation or changes in regional loading conditions.
University of Chicago Medical Center 60637.
D
D
Krauss
T
T
Feldman
R H
RH
Marcus
L
L
Resnekov
R M
RM
Lang
D000368:Aged; D004280:Dobutamine; D004452:Echocardiography; D006801:Humans; D008297:Male; D009200:Myocardial Contraction; D017682:Myocardial Stunning / Q000000981:diagnostic imaging / Q000503:physiopathology*; D016277:Ventricular Function, Left
D004280:Dobutamine