Myocardial viability: impact on left ventricular dilatation after acute myocardial infarction

摘要: Objective: To evaluate whether the presence of viable myocardium, detected by low dose dobutamine echocardiography, limits likelihood left ventricular dilatation in patients with acute myocardial infarction. Patients: 107 were studied echocardiography at (mean (SD)) 3 (1) days after infarction. Cross sectional was repeated three months later. Patients divided two groups based on (n = 47) or absence 60) viability. Results: Baseline characteristics comparable between groups, except for infarct location. Left end diastolic volume index (EDVI) stable viability, but systolic (ESVI) decreased significantly (p 0.006). without viability had a significant increase both EDVI 1000 IU/l) showed that occurred only large infarcts viability. This resulted larger ESVI values group compared plus < 0.05). Multivariate regression analysis identified as an independent predictor dilatation, along wall motion score and number pathological Q waves. Conclusions: The early infarction is associated preservation size, whereas results particularly infarcts.