Auscultation is helpful in the assessment of pulmonic stenotic lesions especially the valvular and tetrad anomalies.1,2 However, the scanty literature on isolated infundibular stenosis indicates that the auscultatory findings are controversial2,3 or unreliable1 in identifying the site of obstruction. Right ventricular outflow stenosis is usually associated with a ventricular septal defect and isolated infundibular stenosis is rare.4 In an attempt to clarify the auscultatory findings of pure infundibular stenosis, seven patients with this anomaly were studied.
Material and Methods
The diagnosis of isolated infundibular stenosis was considered on the basis of history, physical findings, chest x-ray, and electrocardiogram. All patients had right-sided cardiac catheterization and five (patients 2-6 [Table 1] had selective right ventricular angiocardiograms. The youngest patient was 4 years old when these studies were obtained and the others were between 6 and 13 years of age. Five patients had surgical correction of the infundibular