Global and regional left ventricular ejection fraction abnormalities during exercise in patients with silent myocardial ischemia
PF Cohn,
EJ Brown Jr,
J Wynne,
BL Holman,
and
HL Atkins
Sixteen asymptomatic patients with coronary artery disease and silent myocardial ischemia were studied with exercise radionuclide ventriculography. Radionuclide ventriculograms were analyzed for changes in ejection fraction globally and in three regions. Results were compared with radionuclide ventriculograms in 24 symptomatic patients. Both groups (silent myocardial ischemia and angina) were similar in prevalence of multivessel disease and previous myocardial infarction, as well as in age and sex. Global ejection fraction decreased by 0.06 in both groups during exercise; regional ejection fraction also decreased by similar amounts in the two groups. Furthermore, the percent of regions with normal ejection fraction at rest that demonstrated a decrease during exercise was identical: 19 (60%) of 33 versus 26 (60%) of 46. These exercise radionuclide ventriculographic results suggest that abnormalities in regional and global left ventricular wall motion are similar in patients with coronary artery disease with and without silent myocardial ischemia.
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