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Ann Thorac Surg 1987;44:379-388
© 1987 The Society of Thoracic Surgeons

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Articles

Paced Latissimus Dorsi Used for Dynamic Cardiomyoplasty of Left Ventricular Aneurysms

From the Department of Surgery, Divisions of Thoracic Surgery and Plastic Surgery, Allegheny General Hospital, and Surgical Research, Allegheny-Singer Research Institute, Pittsburgh, PA

Accepted for publication March 27, 1987.

^* Address reprint requests to Dr. Magovern, Department of Surgery, Allegheny General Hospital, 320 E North Ave, Pittsburgh, PA 15212

Two patients are described, each with a large left ventricular aneurysm and severe coronary artery disease, and each with an ejection fraction lower than 30% and in congestive heart failure. In both, the left latissimus dorsi (LD) muscle was used in the repair of the ventricular aneurysm because preoperative studies demonstrated that there was concomitant coronary artery disease, and there was a strong suggestion that resection of the entire aneurysm would seriously compromise the residual ventricular capacity. One patient had an 18-year history of coronary occlusion with two infarctions. A large, calcified ventricular aneurysm developed, and despite vigorous medical treatment, intractable congestive heart failure and angina persisted. The diffuse coronary artery disease made this patient a poor candidate for bypass grafting. The other patient sustained an acute myocardial infarction 5 months prior to operation. The left anterior descending coronary artery was totally occluded, and a large apical aneurysm developed along with an akinetic anterior wall and septum. After his heart attack, the patient had progressive dyspnea on exertion. Following operation in both patients, the transpositioned LD, then a component in the repair of the left ventricular wall, was electrically trained to synchronously contract with each systole, driven by a standard dual-chamber cardiac pacemaker. Steady improvement and a return to normal activities were observed in both patients. There was an indication of improved ejection fraction with synchronous contraction of the skeletal muscle.

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