Macro- and microscopic characteristics of the intramyocardial course of the coronary arterie

The presence of myocardial bridges in the right coronary artery system may correlate with its presence in the left coronary artery system and other abnormalities in heart development. Myocardial bridges are more common in men and are mainly localized in the middle third of the anterior interventricular branch of the left coronary artery. Isolated myocardial bridges are more common. The length of myocardial bridges on average ranges from 9.2 to 22.3 mm, the thickness - from 0.2 to 3 mm. A relationship has been found between the length of the bridges and the dimensions of the ventricular complex of the heart. The intramural segment of the coronary artery is usually completely immersed in the myocardium, but sometimes a semi-tunnel passage occurs, in which the coronary artery is covered by myocardium by 2/3 or 3/4 of the circumference of its cross-section. In all sections of the coronary arteries of the heart, regardless of their location in relation to the myocardial bridge, there was atherosclerotic lesion of the coronary artery of varying degrees of severity.