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Objective: To analyze the cardiac pathological features of elderly coronary artery disease (CAD) patients (60 years and over) and evaluate the pathological features at autopsy and risk factors of patients with acute myocardial infarction (AMI). Methods: Data from 471 elderly patients (aged from 60 to 100 years old) with CAD confirmed by autopsy hospitalized in our hospital from April 1969 to October 2013 were retrospectively reviewed. Patients were divided into 2 groups: AMI group(n=128) with AMI as the primary cause of death and the rest served as control group(n=343). The pathological features of coronary lesion and related risk factors of AMI were analyzed. Results: In patients aged 60 and over with CAD, 48.8%(230/471) had severe coronary stenosis, 18.7%(88/471) had three-vessel disease, 71.8% cases (338/471) had left anterior descending artery(LAD)grade Ⅲ and over stenosis, 29.9% (141/471) had LAD grade Ⅳ stenosis, 25.9%(122/471) had left main coronary artery(LM) grade Ⅲ and over stenosis, 9.6%(45/471) had LM grade Ⅳ stenosis, 27.1%(128/471) had AMI. The first AMI accounts for 39.1%(50/128), and 60.9%(78/128) had both AMI and old MI. Compared with the control group, AMI group were younger ((77.1±11.6) years vs. (83.2±9.1) years, P<0.01), had more severe coronary artery stenosis lesion (77.3%(99/128) vs. 38.2%(131/343), P<0.01), higher coronary index which reflects the overall arteriosclerosis (9.9±2.8 vs. 8.0±2.5, P<0.01), more three-vessel disease (30.3%(43/128) vs. 13.7%(45/343), P<0.01), heavier heart weight ((447.8±90.6)g vs. (426.6±99.1)g, P<0.05), higher prevlence of pulmonary congestion or edema (57.8%(74/128) vs. 39.9%(137/343), P<0.01). Twenty-three cardiac ruptures (23/128, 18.0%) were observed in AMI group. Logistic regression analysis showed that grade Ⅳ LAD stenosis (OR=3.55, 95%CI 2.05-6.17, P<0.01), three-vessel disease(OR=2.47, 95%CI 1.30-4.67, P<0.01) were the independent risk factors of AMI in elderly patients with CAD. Conclusions: Severe coronary stenosis is common in CAD patients aged 60 and over. Patients aged 60 and over with AMI have more severe coronary artery stenosis lesion and heavier heart weight. Cardiac rupture is not uncommon in elderly patients with AMI. Severe LAD stenosis and three-vessel disease are the independent risk factors of AMI in the elderly.
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