Coronary Artery Width: Diameter & Normal Ranges

The width or diameter of coronary arteries can vary depending on the specific artery and individual variations. Typically, the main coronary arteries, such as the left main coronary artery and the right coronary artery, have diameters ranging from 2 to 4 millimeters (mm) in adults. The smaller branches of the coronary arteries, known as epicardial arteries, can have diameters ranging from 1 to 2 mm.

However, these dimensions can vary from person to person and may be influenced by factors such as age, sex, underlying medical conditions, and individual anatomical variations. It's important to note that the width of the coronary arteries can be assessed using medical imaging techniques such as coronary angiography, which allows healthcare professionals to evaluate the size and condition of these vessels.