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25 February 2003

Prediction of native coronary artery disease progression following PTCA or CABG in the Emory Angioplasty Versus Surgery Trial.

Xue-Qiao Zhao, Andrzej S. Kosinski, Huiman X. Barnhart, H Robert Superko, Spencer B. King III

Med Sci Monit 2003; 9(2): CR48-54 :: ID: 4762

Abstract

BACKGROUND: The natural history of atherosclerosis progression following revascularization procedures (PTCA or CABG) limits the long-term benefits of these procedures and requires continuation of risk management. MATERIAL/METHODS: Of 392 patients with multivessel disease randomized to an initial strategy of PTCA or CABG in the Emory Angioplasty Versus Surgery Trial (EAST), 298 patients (152 PTCA and 146 CABG) completed 3-year angiographic follow-up. Native coronary artery disease progression was defined as lesions with <50% diameter stenosis (%S) at baseline, measured by QCA, that increased at least 10%S to become >or=50%S during the 3-year follow-up. Major ischemic events (new Q-wave myocardial infarction, a large reversible thallium defect or additional revascularization procedures) attributed to these new lesions were determined based on the ECG ischemic changes and/or the details of the coronary anatomy. RESULTS: Of 298 patients, 53 (18%) (15% of PTCA and 21% of CABG) developed at least one significant new native coronary artery lesion. Of 136 patients with events, 19 (14%) had such events due to progression. In multivariate analysis, native coronary disease progression was independently correlated with hypertension (OR=2.4, p=0.03), ST segment depression =1mm on baseline ETT (OR=2.7, p=0.01), and percent of small LDL particles (LDL IIIa-IVb) (OR=1.2 for every 5% increase, p=0.01). CONCLUSIONS: In EAST, the native CAD progression accounted for one in seven major ischemic episodes over a 3-year follow-up. Patients with metabolic atherogenic risk profiles were more likely to have disease progression. These findings indicate the importance of more aggressive risk factor modification following revascularization.

Keywords: Angiography, Angioplasty, Transluminal, Percutaneous Coronary, Coronary Arteriosclerosis - physiopathology, Coronary Arteriosclerosis - surgery, Coronary Arteriosclerosis - therapy, Coronary Artery Bypass, Disease Progression, Lipoproteins, LDL - blood, Lipoproteins, LDL - chemistry, Myocardial Ischemia - physiopathology, Particle Size, Risk Factors

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Medical Science Monitor eISSN: 1643-3750
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