Understanding coronary circulation. Coronary circulation has Epicardial coronary arteries which have a size more than 500 microns. Most of them are parallel arteries supplying their respective territories with significant Collateral supply. Named vessels like Left main stem and Right branch further and supply the whole teritoy.
Infact single coronary sysem exist in 0.5% of the normal population without Posing any threat of ischemia to the whole heart. Very fact single coronary could supply the whole heart should make us understand if only one of the major coronary is without the disease and rest occuluded gradually there may not be significant ischemia to the myocardium. But rarely atherosclerotic coronary arteries spares any one.This fact must be borne in mind in assessing ischemia based on the coronary arteriography. These Epicardial coronary arteries offers only 1% of the…
