Ventricular performance was evaluated in 21 patients with uncomplicated acute transmural myocardial infarction (10 anterior and 11 inferior). Left ventricular global and regional ejection fraction, ejection rate and right ventricular ejection fraction were assessed using radionuclide ventriculography. The results were as follows : 1) In anterior infarction, left ventricular global ejection fraction was more significantly depressed than in inferior infarction(mean+/-SD : 33. 0+/-15.4% versus 48.6+/-7.0%, P<0.01). 2) In inferior infarction, right ventricular global ejection fraction was more depressed than in anterior infarction(33.3+/-9.8% versus 45.0+/-13.2%, P<0.05). 3) Regional ejection fraction of septal, apico-inferior and posterolateral wall were found to be depressed in anterior infarction than in inferior infarction, but no significant differences were present. It is concluded that the magnitude of right and left vnetricular dysfunction was affected by the location of acute transmural infarction.
Humans ; Infarction ; Myocardial Infarction* ; Radionuclide Ventriculography ; Stroke Volume