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The left main coronary artery arises from above the left portion of the aortic valve and then usually divides into two branches, known as the left anterior descending (LAD) and the circumflex (Circ) coronary arteries. In some patients, a third branch arises in between the LAD and the Circ.
Hannu Romppanen and Matti Niemelae. NiemelÃ¤ ostial disease of THE lad AND lcx is a challenge for the interventional. Cardiologist focal ostial stenting may result in incomplete lesion, coverage or plaque shift into the adjacent, vessel creating left main equivalent. diseaseo determine whether the ostial plaque of LAD involved the distal left main coronary artery (LM) and the left-circumflex coronary (LCX) ostium, we decided to perform pre-intervention intravascular ultrasound (IVUS) using standard technique.