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J Am Coll Cardiol, 1989; 14:750-755 © 1989 by the American College of Cardiology Foundation |
Willis J. Potts Children's Heart Center, Division of Cardiology, Children's Memorial Hospital, Chicago, Illinois 60614.
The relation between preoperative left ventricular muscle mass and clinical outcome of the Fontan procedure was evaluated retrospectively in 22 patients with tricuspid atresia who were selected for this physiologic surgical correction by conventional hemodynamic criteria. Patients were divided into two groups: group A (excellent or good outcome) and group B (poor outcome or death) based on the clinical course assessed up to 9.5 years postoperatively. Thirteen of 22 group A patients did not have prolonged, clinically significant, systemic venous hypertension and were not on long-term diuretic drug therapy. Nine of 22 group B patients either had clinically significant systemic venous hypertension, required long-term diuretic drug therapy or died (3 patients). Age at surgery, pulmonary arteriolar resistance, left ventricular ejection fraction, end-diastolic volume, end-diastolic pressure, systemic oxygen saturation and pulmonary to systemic blood flow ratio (Qp/Qs) were not statistically different between the two groups. Left ventricular muscle mass, both in group A patients (92 +/- 31 g/m2) and in group B patients (146 +/- 61 g/m2), was greater than the normal mean value (p less than 0.01 and p less than 0.001, respectively). Left ventricular muscle mass in group B was significantly greater than in group A (p less than 0.01). Furthermore, left ventricular muscle mass/end-diastolic volume (mass/volume) ratio, reflecting the extent of left ventricular hypertrophy relative to volume overload, was significantly greater in group B (1.1 +/- 0.28) than in group A (0.84 +/- 0.21) (p less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)
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