LEFT VENTRICULAR EJECTION FRACTION AFTER ACUTE MYOCARDIAL INFARCTION.

Abstract

Objective: (1). To measure and compare Left Ventricular EjectionFraction (LVEF) after acute anterior wall and inferiorwall myocardial Infarction and correlate LVEF with clinical findingsin the patients. (2) To see prevalence of Left Ventricular Failure (LVF) after AMI. Design: Prospective observationalechocardiography based study.Setting: Sheikh Zayed Hospital Lahore. Period: From 2001 to 2002. A total of 60 (sixty)patients of (anterior or inferior) Acute Myocardial infarction (AMI) were included in the study. Patients were divided intwo groups on the basis of anterior myocardial wall MI (AWMI) or inferior myocardial wall MI (IWMI). Echocardiographywas done on all cases and ejection fraction was calculated by applying Simpson’s Rule and patients were examinedat the same time to see the presence of signs of left ventricular failure (LVF). (LVEF) was correlated with the findingsof LVF in these patients. Results: In patients with LVF mean ejection fraction (EF) was 37.13 with standard deviation(SD) of 8.4 %. In patients without failure the mean EF was 56.29% with SD of 3.75. In 30 patients of IWMI, mean EFwas 54.93% with SD of 6.86. In 30 patients of AWMI it was 46.07% with SD of 11.72. In all 60 patients minimum EFwas 30% and maximum was 60% with a mean of 50.50 with SD of 10.52. In AWMI, 53% patients had signs of leftventricular failure. In patients of IWMI, 13.3% had signs of LVF. Conclusions: AWMI causes more decrease in LVEF.LVF is more commonly associated with AWMI than IWMI. There is statistically significant difference in LVEF of patientswith and without LVF.