From 1988 to 1992, 65 patients underwent endoventriculoplasty (EVP) for anteroapical left ventricular aneurysm. The operative mortality was 4.6%, and 9.2% needed intraaortic balloon counterpulsation (IABP). Forty-three patients were restudied by ventriculography and the preoperative and postoperative silhouettes were analyzed by means of a special computer program. In 24 patients computerized analysis showed a restored left ventricular (LV) geometry with symmetrical contraction pattern and a contractile apical segment. Residual deformity of the LV chamber associated with an asymmetrical contraction pattern was present in 19 cases. Data from these 43 patients were analyzed to detect predictive factors for successful heart geometry reconstruction. Univariate analysis revealed that the preoperative ejection fraction, global contraction score, and a non-aneurysmatic segments contraction score did not determine successful reconstruction. The presence of a preserved proximal septum (2.5 cm or more) on echocardiography was the only significant predictor. We would recommend liberal use of the EVP technique in patients with anteroapical LV aneurysm and preserved proximal septum in order to restore satisfactory LV geometry with a low operative risk. Caution must be taken when performing EVP in patients with fibrotic proximal septum.