Dobutamine-induced ST-segment elevation in patients without myocardial infarction.
During dobutamine stress echocardiography, ST-segment elevation developed in 20 of 372 patients (5%) without previous myocardial infarction and was associated with a transient severe asynergy of the myocardial region corresponding to the site of ST elevation. In 17 of 19 patients, ST-segment elevation was associated with a critical stenosis of the ischemia-related coronary artery, whereas in 2 of 19 patients with no critical lesions of the ischemia-related artery, coronary vasospasm was the most likely mechanism of myocardial ischemia.
Previtali
M
M
Department of Cardiology, IRCCS Policlinico San Matteo, University of Pavia, Italy. previt@tin.it
Fetiveau
R
R
Lanzarini
L
L
Cavalotti
C
C
D002316:Cardiotonic Agents; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000503:physiopathology*; D004280:Dobutamine; D004452:Echocardiography / Q000379:methods; D004562:Electrocardiography; D005080:Exercise Test / Q000379:methods; D006329:Heart Conduction System / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged
D002316:Cardiotonic Agents; D004280:Dobutamine