Atrio-Ventricular Block; Incidence of High Degree Atrio-Ventricular Block Complicating Acute Myocardial Infarction and Its Effects on in-Hospital Mortality

Objectives: The incidence of high degree atrioventricular block (HAVB) variesfrom 2.7 to 14% after acute STEMI. The aim of this study was to evaluate the incidence of highdegree 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 myocardialInfarction were included in this study. Patients suffering from 2nd degree Mobitz type II or 3rddegree heart block were labelled as High Degree Atrioventricular Block (HAVB). Data Analysiswas made using Statistical Package for Social Sciences Software V17. Chi-square test wasused to compare in-hospital mortality between the groups taking p-value <0.05 as significantdifference. Results: The mean age of patients who presented with myocardial Infarction inour 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 IschemicHeart Disease. Most common type of MI was anterior wall present in 50.5% patients and 2ndmost common was inferior wall MI presented in 26.5% patients. High degree atrio-ventricularblock was present in 9 (4.5%) patients. In-hospital mortality was significantly high in patientswith 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 withhigh degree atrio-ventricular block (HAVB) is associated with higher rate of in-hospital mortality