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The Annals of Thoracic Surgery, Vol 45, 537-540, Copyright © 1988 by The Society of Thoracic Surgeons

ARTICLES

Predictors of operative mortality in critical valvular aortic stenosis presenting in infancy

JW Hammon Jr, FM Lupinetti, MD Maples, WH Merrill, WH First, TP Graham Jr and HW Bender Jr
Department of Cardiac and Thoracic Surgery, Vanderbilt University Medical Center, Nashville, TN.

Congenital aortic stenosis presenting within the first 6 months of life is a highly lethal anomaly. Although aortic valvotomy has offered excellent palliation in many instances, the operative risk remains substantial. To better understand the factors associated with a poor operative result, the records of all patients less than 6 months of age undergoing aortic valvotomy at our institution from 1972 through 1986 were analyzed. Nineteen patients (58%) (Group I) survived operation; 14 (42%) (Group II) died. The following variables were analyzed in an attempt to define those with prognostic significance: mean pulmonary artery pressure (PAP), left ventricular (LV) peak systolic pressure, LV end-diastolic pressure, peak systolic aortic valve gradient, LV end- diastolic volume (LVEDV), LV ejection fraction, and age at operation. The only variables that were significantly different in the two groups were mean PA (Group I, 29 +/- 3 mm Hg, and Group II, 54 +/- 3 mm Hg; p less than 0.001) and LVEDV (Group I, 50 +/- 8 ml/m2, and Group II, 20 +/- 4 ml/m2; p less than 0.05). No patient with an LVEDV of 20 ml/m2 or less survived operation. We conclude that small LV dimension and elevation of PAP may be predictive of a poor surgical result in patients with severe aortic stenosis presenting in infancy.

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