ATRIO-VENTRICULAR BLOCK Incidence of high degree atrio-ventricular block complicating acute myocardial infarction and its effects on in-hospital mortality.

摘要

Objectives: The incidence of high degree atrioventricular block (HAVB) varies from 2.7 to 14% after acute STEMI. The aim of this study was to evaluate the incidence of high degree atrioventricular block (HAVB) in patients of acute myocardial infarction. Study Design: Observational study. Setting: Sheikh Zayed Medical College/Hospital Rahim Yaar Khan. Period: March 2016 to May 2016. Material and Methods: Two hundred patients of acute myocardial Infarction were included in this study. Patients suffering from 2 nd degree Mobitz type II or 3 rd degree heart block were labelled as High Degree Atrioventricular Block (HAVB). Data Analysis was made using Statistical Package for Social Sciences Software V17. Chi-square test was used to compare in-hospital mortality between the groups taking p-value <0.05 as significant difference. Results: The mean age of patients who presented with myocardial Infarction in our hospital was 50.13+6.97 years. Out of 200 patients, 35 (17.5%) were smokers, 83 (41.5%) hypertensives, 69 (34.5%) diabetics and 48 (24.0%) were with positive family history of Ischemic Heart Disease. Most common type of MI was anterior wall present in 50.5% patients and 2 nd most common was inferior wall MI presented in 26.5% patients. High degree atrio-ventricular block was present in 9 (4.5%) patients. In-hospital mortality was significantly high in patients with HAVB, in these patients in-hospital mortality was 2 (22.2%) as compared to only 8 (4.2%) in patients of without HAVB (p-value 0.01). Conclusion: Myocardial infarction complicated with high degree atrio-ventricular block (HAVB) is associated with higher rate of in-hospital mortality