Partial left ventriculectomy:: Preoperative risk factors for perioperative mortality

This study aimed at determining risk factors for perioperative mortality for patients undergoing partial left ventriculectomy. Fourteen patients with end-stage congestive heart failure underwent partial ventriculectomy at our institution from February, 1995 to October, 1997. Mean age was 48±11 years, symptoms duration 44±34 months, New York Heart Association symptoms score 4±0, systolic blood pressure 97.69±20.06 mmHg, diastolic blood pressure 65.38±13.91 mmHg, heart rate 91±15 beats/min, furosemide daily dose 121.66±96.65 mg and captopril daily dose 68.75±76.76 mg. Seven (50%) patients needed inotropic support for hemodynamic stabilization. On echocardiography, left ventricular diastolic dimension was 81.71±11.92 mm. Left ventricular ejection fraction determined by radionuclide ventriculography or echocardiography was 16.71±5.13. At heart catheterization, mean right atrial pressure was 12.50±7.72 mmHg, mean pulmonary capillary wedge pressure 23.60±7.79 mmHg, and mean pulmonary artery pressure 34.10±12.81 mmHg. Twelve patients had idiopathic dilated cardiomyopathy and two patients had a globally dilated heart with single vessel coronary artery disease. Aneurysmectomy, mitral valve surgery or coronary artery bypass surgery were not performed in any patient. Four (28%) patients died: three in the operating theatre and one from low output syndrome 2 days after surgery. The proportion of patients operated on with cardiogenic shock was four (100%) in nonsurvivors and 0% in survivors (P=0.001). Inotropic support was necessary in three (30%) survivors and in four (100%) nonsurvivors (P=0.06). Thus, preoperative hemodynamic instability may be associated with perioperative mortality after partial left ventriculectomy.