The clinical outcomes of myocardial incision and tearing for the treatment of myocardial bridge

Objective To analyze clinical outcomes of myocardial incision and tearing for the treatment of myocardial bridge. Methods A retrospective cohort study was conduct to review the clinical date of 29 patients who underwent surgical myotomy from January 2014 to January 2018 in the Second Hospital of Lanzhou University. A total of 11 patients(incision group) were experienced traditional myotomy on myocardial bridge that the myocardium was longitudinally incised along the direction of the coronary artery, while 18 patients(tearing group) were treated by myocardial incision combined with tearing that longitudinally incised myocardium and deeply tissue tearing. The operation time of surgical myotomy, the amount of bleeding, the number of branches of vascular injury and the number of ventricular ruptures during operation were compared between the two groups. After followed up half a year to one year, the clinical symptoms of angina pectoris, myocardial ischemia by electrocardiogram suggested, and coronary stenosis by coronary CT suggested were collected. Results The operation time of surgical myotomy, the amount of bleeding patients and the number of branches of vascular injury during operation in the incision group were higher than those in the tearing group(P 0.05). After followed up half a year to one year, there was no significant difference in the clinical symptoms of angina pectoris, myocardial ischemia by electrocardiogram suggested, and coronary stenosis by coronary CT suggested(P>0.05). Conclusion Myocardial incision combined with tearing is a surgical procedure with short operation time and low bleeding risk, which is more beneficial than the traditional longitudinally incised for the myocardial bridge. Key words: Myocardial bridge; Myotomy; Clinical outcome