Myocardial bridging (MB) is congenital anatomic varia on in which a band of cardiac muscle covers a part of an epicardial coronary artery. The artery under the cover of myocardium is known as ‘tunnelled segment’. The clinical implica on of myocardial bridging is a debatable subject since early 1960s at the introduc on of coronary arteriography. Myocardial bridge is considered benign by many authors but recent literature describes it as associated with various clinical condi ons such as myocardial ischaemia, circulatory problems, angina, myocardial infarc on, sudden cardiac death, systolic compression and other cardiac insults that may require surgical interven on. It is also said that myocardial bridges has ‘protec ve eff ect’ from atherosclerosis within the coronary artery that is bridged when compared with uncovered vessels of the same heart. The present study is aimed to analyse the presence of myocardial bridges over coronary arteries and their branches by coronary angiography. 380 coronary angiographs consis ng of 292 male and 88 females were analysed retrospec vely for the presence of MB on the coronary arteries and their branches 

in department of Anatomy and cardiology, AIIMS Rishikesh. 20 MBs was observed in 19 cases (2 females and 17males) out of 380 cases of angiographs (88 females and 292 males) cons tu ng 5.26 %. Single MB was observed in 18 cases and two MBs were observed in one case. In 18 cases, MB was observed only on LAD while in one case; both LAD and LCX were covered by MB. Length of MB ranged between 12mm to 30 mm with mean 21.5 ± 2.12. Percentage reduc on of diameter and area of coronary artery covered by MB ranged between 22.9- 78.69 and 40.48- 95.5 respec vely. In our case all the pa ents with MB were having coronary artery diseases except one. Thus isolated MB may be benign anomaly but it is defi nitely a contribu ng factor in causing various coronary heart diseases. It is great challenge to cardiologist to detect symptoma c pa ents with MB and to plan be er therapeu c and surgical interven ons. An op mal use of new non-invasive diagnos c methods in combina on with invasive methods will enhance our understanding of this anomaly and help in reducing the mortality.