Abstract

Acute myocardial infarction (AMI) is a major cause of morbidity and mortality worldwide. Despite significant improvement in the past decades, still a majority of patients subsequently suffer from LV dysfunction and heart failure. AIMS AND OBJECTIVES: To find out correlation between ECG changes and LVEF. Prediction of LVEF from ECG changes. MATERIALS AND METHODS: 200 patients of Myocardial Infarction were studied. Detailed history, physical examination was done as per pre-fixed proforma. Relevant haematological, biochemical investigations along with ECG and 2D ECHO were done. LVEF was assessed using 2D ECHO. RESULT: The study included patients from 24-85 years age, 170 (85%) were male and 30 (15%) were females. Maximum were noted in 51-64 years (82). 127 cases (63.5 %) were AWMI and 73 cases (36.5% ) were IWMI. The commonest risk factor was smoking ( 20%), alcohol ( 13%), hypertension ( 8% ), diabetes ( 6.5% ).Among AWMI patients,118 had LVEF 30-45%, 5 had LVEF <30%, 4 had LVEF >45%. Among IWMI patients, 63 had LVEF 30-45%, 1 had LVEF <30%, 9 had LVEF>45%. ECG changes taken for comparison included QS complexes, ST elevation, Loss of R wave. In IWMI patients , 52 had QS complex in II, III ,aVF with mean LVEF of 43.269% and 18 had QS complex in II, III , aVF , V4-V6 with mean LVEF of 33.333% . This shows that more the lead involvement in IWMI lesser is the LVEF. Similar findings were observed in AWMI. In AWMI patients, 12 with ST elevation in V1-V3 had mean LVEF of 39.583% , 25 with ST elevation in V1-V4 had mean LVEF of 39.800 %, 23 with ST elevation in V1-V6 had mean LVEF of 36.696 % and 7 with ST elevation in I, aVL, V1-V6 had mean LVEF of 31.429 %.Thus, more the lead involvement in AWMI lesser is the LVEF, Similar findings were observed in IWMI also. Loss of R wave also showed a negative correlation with LVEF. CONCLUSION: We concluded a negative correlation between QS complex, ST elevation and Loss of R wave with LVEF. Thus we conclude that more the ECG leads showing QS complexes, ST elevations, Loss of R wave lesser is the LVEF and this can be used to predict the LVEF in patients of Myocardial Infarction based on ECG findings.

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