MILD PULMONIC STENOSIS: A CLINICAL AND HEMODYNAMIC STUDY OF ELEVEN CASES

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Abstract
Isolated pulmonic stenosis is a relatively common congenital anomaly and frequently exists as a mild lesion. Eleven patients with right ventricular systolic pressures of less than 50 mm Hg were studied clinically and hemodynamically. Nine were completely asymptomatic. Roentgenographic studies demonstrated dilatation of the main pulmonary artery without definite evidence of chamber enlargement. Two patients had suggestive ecg evidence of right ventricular hypertrophy. One had a complete right bundle branch block; 2 others had incomplete right bundle branch blocks. Cardiac catheterization demonstrated right ventricular-pulmonary artery systolic pressure gradients of 7 to 20 mm Hg, mild right ventricular hypertension, normal cardiac outputs, and normal arterial oxyhemoglobin saturation.