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[The effect of aneurysm resection on left ventricular function].

The effect of successful aortocoronary artery bypass surgery on left ventricular (LV) function was studied by angiography in 13 patients with coronary-artery disease and resection of a ventricular aneurysm. The following were calculated from single-plane right anterior oblique LV cine-angiograms: LV end-diastolic volume (EDV), end-systolic volume (ESV), ejection fraction (EF), percentage shortening of the medial perpendicular short axis (deltaM), mean velocity shortening of the circumferential fibres (VCF). The changes in the five hemi-axes of the anterior LV wall, and five of the inferior wall were averaged to give a value for relative anterior wall motion (SMV) and inferior wall motion (SMH). Changes in apical motion (SMS) were calculated from the percentage changes in the base-to-apex axis. The following mean values (x plus or minus s) were obtained four months before and 11 months after aneurysmectomy: EDVI (ml/m2) 154 plus or minus 27 (126 plus or minus 23), ESVI (ml/m2) 107 plus or minus 28 (56 plus or minus 15), SVI (ML/M2) 46.5 plus or minus 12.7 (69.9 plus or minus 23.1), EF (%) 32.6 plus or minus 8.0 (54.6 plus or minus 12.0), SMV (%) 6.1 plus or minus 10.0 (25.0 plus or minus 13.4), SMH (%) 25.9 plus or minus 13.1 (31.2 plus or minus 11.1), SMS (%) 5.1 PLus or minus 3.4 (13.1 plus or minus 4.2). These results indicated significant improvement in ventricular pumping action and wall motion after aneurysm resection and aortacoronary bypass surgery in patients with coronary-artery disease and severe cardiac failure.