[The effects of aorto-coronary bypass grafting on left ventricular diastolic function in patients with left ventricular dysfunction].

To determine the effects of aorto-coronary bypass grafting on left ventricular diastolic function in patients with low ejection fraction (EF less than or equal to 0.40), 17 patients were studied. They were divided into two groups, Group I: 8 patients without previous myocardial infarction, Group II: 9 patients with previous myocardial infarction. Left ventricular diastolic function was assessed by maximum negative dp/dt, constant T, diastolic compliance and 1/3 functional filling. In conclusions, when ejection fraction is depressed (EF less than or equal to 0.40), myocardial revascularization improves left ventricular diastolic function in patients without previous myocardial infarction, but not with previous myocardial infarction.