Abstract

Forty consecutive patients having left ventricular (LV) aneurysmectomy were evaluated for surgical risk predictors and were then followed up after operation. Factors evaluated included age, time since last myocardial infarction, NYHA classification, principal indication for surgery, LV end diastolic pressure, LV “A” wave size, number of coronary systems with >70% stenosis, number of coronary bypass grafts, location of aneurysm, and ejection fraction of the nonaneurysmal or “contractile segment,” determined by a modification of the method of Watson et al1 (MCSEF). There was 100% follow-up. There were four perioperative deaths and two late deaths. Operative mortality was 3.4% in patients with MCSEF ≥45% and 37.5% in patients with MCSEF <45% (P < .05). None of the other factors evaluated significantly affected mortality independent of MCSEF. Survivors had a mean follow-up of 22 months with a mean improvement in symptoms of 1.6 NYHA class (from 3.3 to 1.7). Forty-four percent have returned to their previous occupations. It is concluded that: (1) the MCSEF is of prime importance in evaluating risk for LV aneurysmectomy; (2) for patients with MCSEF ≥45%, LV aneurysmectomy is a low-risk procedure; and (3) LV aneurysmectomy results in sustained relief of symptoms in most patients.