Aortic valve prolapse and aortic regurgitation associated with subpulmonic ventricular septal defect.

The natural development of aortic valve deformity was studied in 315 patients with subpulmonic ventricular septal defect. The patients with early development of aortic regurgitation had a pulmonary-to-systemic flow ratio of > 1.5, normal right ventricular pressure, and severe aortic regurgitation.