Abstract
Whether the severity of left main coronary artery (LMCA) disease reflects LMCA and overall coronary atherosclerotic burden is not known. We aimed to assess nonculprit LMCA disease characteristics and the relationship with atherosclerosis in the rest of the coronary arteries as well as patient outcomes. In the PROSPECT study, 697 patients with acute coronary syndromes underwent three-vessel gray-scale and radiofrequency intravascular ultrasound after percutaneous coronary intervention. Overall, 552 patients with adequate LMCA imaging were compared according to LMCA plaque burden. The tertile with the highest plaque burden in the LMCA had the smallest LMCA minimum lumen area (17.4, 14.2, 10.5, lowest through highest tertiles, respectively, P<0.0001) and the greatest percent necrotic core volume (2.8, 5.6, 9.5%, lowest through highest tertiles, respectively, P<0.0001). Furthermore, the tertile with the highest plaque burden was also significantly associated with the highest overall non-LMCA percent atheroma volume within the major epicardial arteries (48.3, 49.2, 50.8%, lowest through highest tertiles, respectively, P<0.0001). After adjusting for patient background, the LMCA plaque burden was independently associated with non-LMCA...Continue Reading
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