Objective To explore the clinical characteristics of the patients with acute anterior myocardial infarction with right bundle brunch block. Methods Retrospectively comparative analysis the clinical characteristics

ECG and prognosis of the patients with acute anterior myocardial infarction with and without right bundle brunch block in our hospital from May 2016 to June 2021. Results The observe group were the patients with acute anterior myocardial infarction with right bundle brunch block

including 48 patients with ST segment elevation acute myocardial infarction and 33 patients with non-ST segment elevation acute myocardial infarction. There were 59 cases of acute complete occlusion in the proximal descending branch. The control group were the patients with acute anterior myocardial infarction without right bundle brunch block

including 365 patients with ST segment elevation acute myocardial infarction and 161 patients with non-ST segment elevation acute myocardial infarction. The mortality in-hospital and the major adverse cardiac events in the observe group were higher than those in the control group.Conclusions Acute anterior myocardial infarction with right bundle brunch block often indicates the occlusion in the proximal anterior descending branch

the large area of myocardial necrosis

the unstable hemodynamics

and the mortality and major adverse cardiac events during hospitalization are higher than those in the control group. The occlusion of the ostium anterior descending artery does not necessarily lead to right bundle branch block.