A study to find out the incidence of myocardial bridges in the formalin fixed hearts and its co relates

Abstract

Background: Myocardial Bridges are structures consisting of cardiac muscle fibers which pass above the coronary arteries and their branches. It is regarded as a common anatomic variant rather than a congenital anomaly Objectives: 1. To find the incidence of myocardial bridges in the formalin fixed hearts. 2. To study its distribution and its correlates in the different coronary arteries. Material & Method: A total of 60 formalin fixed hearts were dissected. All the cadavers hearts were adults hearts. After cleaning hearts were numbered and dissected and Coronary Vessels were then traced from the aortic sinus to their termination by cleaning the epicardium and perivascular fat tissues. The origins and courses of two coronary arteries were thus cleared. Once a myocardial bridge had been identified, it was cleaned properly and numbered. The exact locations from the beginning till the end of myocardial bridges were defined. The length of each bridge as well as its distance from the sinus was measured directly by using thread and measuring scale. Result: Of the total 60 formalin fixed hearts dissected, myocardial bridges were present in 22 hearts(36.7%.). The incidence of myocardial bridges was statistically significantly higher in the left coronary artery (36. 7%) as compared to the right coronary artery. Its clearly shows that incidence of myocardial bridging is highest in anterior interventicular artery(AI) Conclusion: The present study hereby observed that incidence of myocardial bridges are quite common in the human being. They are most commonly observed in the left anterior descending artery and t their branches.

Hair pin bends of epicardial coronary arteries - a unique feature in multiple myocardial bridges

“…Thus, the incidence of myocardial bridges in this study is 41 %. This incidence of the myocardial bridge in the present study correlates with the studies done by some researchers, (Lujinović et al, 2013;Monika et al, 2014). The incidence of MB in present study correlated with the incidence of MB in angiographic studies carried by Irvin (1982); Noble et al (1976b); Kramer et al (1982); Juillière et al (1995); Angelini et al (1983b), the angiographic prevalence of MB was ranges from 3.2% to7.5%.…”