Impact of Primary Percutaneous Coronary Intervention on AV Blocks with Acute ST-Elevation Myocardial Infarction

Abstract

Objective: To determine the impact of Primary Percutaneous Coronary Intervention on Atrioventricular Blocks with Acute STElevation Myocardial Infarction.

Study Design: Analytical Cross-sectional study.

Place and Duration of Study: Armed Forces Institute of Cardiology/National Institute of Heart Disease, Rawalpindi Pakistan,
from Apr, 2023 to Sep, 2023.

Methodology: A total of one hundred and fifty patients diagnosed with acute ST-Elevation Myocardial Infarction (STEMI)
who presented with AVB symptoms were enrolled in the study. Non-probability Consecutive Sampling technique was used.
Data was collected prospectively using a questionnaire, and Daily Electrocardiography (ECG) monitoring was performed.
PPCI was performed to restore blood flow in affected coronary artery. Chi-square and t-test were used to analyze the data. pvalue<0.05 was taken as significant.

Results: Out of 150 participants, mean age of participants was 58.37±7.90 years, 116(77.3%) were males and 34(22.7%) were females. The research findings unveiled a significant occurrence of concurrent health conditions, such as diabetes mellitus and dyslipidemia in patients with AVB (p<0.05). Regarding types of AVB, 1st-degree AVB was observed in 23(15.3%) patients, Mobitz-I in 9(6.0%), Mobitz-II in 3(2.0%), and 3rd-degree AVB in 1(0.7%) of the cases. AVB were resolved in 72(47.6%) patients. There was statistically significant AVB resolution in all the patients except 6(7.7%) 1st degree block patients (p<0.001).

Conclusion: Utilization of invasive treatment strategy yielded a favorable outcome, leading to the resolution of AVB in 48% of cases and the infrequent need for pacemaker insertion