ATRIO-VENTRICULAR BLOCK

INCIDENCE OF HIGH DEGREE ATRIO-VENTRICULAR BLOCK COMPLICATING ACUTE MYOCARDIAL INFARCTION AND ITS EFFECTS ON IN-HOSPITAL MORTALITY

Abstract

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 2nd degree Mobitz type II or 3rd
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 2nd
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