“…The incidence of aneurysm in autopsy reports of patients after a myocardial infarction has varied from 3 % (Dubnow, Burchell & Titus, 1965) to 38% (Parkinson, Bedford & Thomson, 1938). The diagnosis is rarely made in life although Master et al (1940) found abnormalities of pulsation of the cardiac contour after myocardial infarction in 73 % and Kurtzman & Lofstrom (1963) in 78% of patients. Not all of these patients had aneurysms but recently Gorlin, Klein & Sullivan (1967) demonstrated twenty-four cases of aneurysm by left heart angiography, in a series of 100 patients with coronary artery disease, and two of the present authors (Groden & James, 1968) have found radiological features suggestive of aneurysm in 20% of patients who had survived a myocardial infarction more than 3 months previously.…”