Frequency of new onset right bundle branch block in acute myocardial infarction and its coronary angiographic findings in patients presenting at Tertiary Care Hospital, Peshawar

Background: Right bundle branch block has prognostic significance in the setting of acute myocardial infarction; this research is intended to determine the incidence of new-onset right bundle branch block in acute myocardial infarction and its angiographic findings. Methodology: This descriptive cross-sectional study was conducted in a tertiary care hospital, i.e., the Cardiology Department, Lady Reading Hospital, Peshawar, from 13/5/2016 to 13/11/2016. A total of 91 patients were included in the study. Baseline investigation, including ECG (Nihan Koden), Coronary angiography (Siemens Healthineers), on patients who qualify for early invasive therapy and angiographic findings. All the information, like age and gender, was recorded. 91 patients with acute myocardial infarction who presented within 24 hours were observed, in which male to female ratio was 1.17:1. The study enrolled the age group from 30 up to 75 years. Results: Average age was52.6±7.71 years. New onset right bundle branch block (RBBB) was found in 13(14.29%) patients in acute myocardial infarction. Conclusion: In conclusion, RBBB was observed in 13% of patients where angiographic findings showed triple vessel disease 38.5%, double vessel coronary artery disease 30.8%, single vessel disease 15.4%, and left main stem disease15.4% respectively, there is a high rate of severe CAD in patients presenting with RBBB in the setting of the acute coronary syndrome, so early reperfusion is recommended.