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Ann Thorac Surg 1995;60:1059-1062
© 1995 The Society of Thoracic Surgeons

Original Articles: Cardiovascular

Left Ventricular End-Systolic Volume Index in Patients With Ischemic Cardiomyopathy Predicts Postoperative Ventricular Function

Atsushi Yamaguchi, MD, Takashi Ino, MD, Hideo Adachi, MD, Akihiro Mizuhara, MD, Seiichiro Murata, MD, Hitoshi Kamio, MD

Department of Cardiovascular Surgery, Jichi Medical School, Omiya Medical Center, Saitama, Japan

Accepted for publication May 1, 1995.

Background. We investigated the usefulness of the preoperative left ventricular end-systolic volume index (LVESVI) as a predictor of postoperative ventricular function.

Methods. We retrospectively reviewed the records of 310 patients who underwent coronary artery bypass grafting and identified 20 patients with ischemic cardiomyopathy with a preoperative ejection fraction less than 0.30. We determined the preoperative and postoperative ejection fraction, LVESVI, and left ventricular end-diastolic volume index using biplane left cineventriculography. Patients were divided into groups depending on whether their preoperative LVESVI was less than 100 mL/m2 (group A, n = 10) or greater than 100 mL/m2 (group B, n = 10).

Results. The mean ejection fraction increased significantly after coronary artery bypass grafting in group A from 0.25 ± 0.05 to 0.40 ± 0.09 (p < 0.01), but did not change significantly in group B (0.26 ± 0.05 versus 0.23 ± 0.06). The mean LVESVI decreased significantly in group A from 83.2 ± 13.7 to 61.7 ± 20.4 mL/m2 after operation (p < 0.05), but did not change significantly in group B (124.7 ± 21.0 versus 121.5 ± 37.6 mL/m2). In group B, 4 patients had signs of congestive heart failure during the follow-up period and had to be rehospitalized.

Conclusions. The mean ejection fraction improved significantly after coronary artery bypass grafting in patients with a preoperative LVESVI less than 100 mL/m2, despite the presence of a global left ventricular ejection fraction less than 0.30. Our results suggest that the preoperative LVESVI predicts the postoperative status and left ventricular function in patients with ischemic cardiomyopathy.




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