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.
During routine dissection of a middle aged male cadaver, it was found that the middle trunk of brachial plexus was missing on left side. The Upper trunk was formed from union of C5, C6 and C7 while the lower trunk was normal having union of C8 and T1. Rest of the plexus below cord and on right side was normal. Erb's point was present there having fibres of C5, 6&7. Knowledge of Variation in brachial plexus is very important for orthopaedic surgeons, neurosurgeon and anesthesiologists.
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