Epidemiological, Angiographic and Cardiovascular Outcomes of Patients Diagnosed with Myocardial Bridge

Background: Myocardial bridging (MB) is a congenital coronary anomaly that can lead to harmful cardiac consequences if not diagnosed and treated. Objectives: This study aims to evaluate the Epidemiological, angiographic, and cardiovascular outcomes of patients diagnosed with myocardial bridge. Methods: The current research was conducted as a retrospective study in which 151 patients who underwent angiography participated. These patients were admitted between May 2014 and May 2016 at Heshmat and Aria hospitals in Rasht. The collected information in the present study included age, gender, blood pressure history, diabetes mellitus, blood lipid disorders, ischemic changes in ECG, ischemic changes in heart scan, output fraction, ischemic changes in exercise test, number of bridges, name of vessel, length of muscle bridge, and distance from the opening. To analyze the variables, the Chi-square test and independent t-test were used. Results: As a result, we found that myocardial bridging was present in 57 patients, and 95.08% of the bridges were located above LAD. According to this study, there is no significant relationship between the length of the bridge and the distance of the bridge from the vessel opening with the occurrence of ischemic changes in ECG and myocardial perfusion scan (P > 0.05). However, the average distance of the bridge from the vessel opening in patients who had a positive exercise test was lower compared to the patients who had a negative test. They had a negative exercise test, and this difference was statistically significant (P < 0.05). Conclusions: Furthermore, in patients diagnosed with an MB by CAG, the most MB located in the LAD, and this issue can help to better understand the outcome and how to manage these patients.