Abstract
The data presented in this study demonstrate a linear and statistically significant relation between the mean pulmonary arterial systolic pressure and the P 2- V interval in patients with isolated ventricular septal defects. No essential differences were observed when the interval was measured by using direct atrial pressure curves instead of the external jugular venous tracing. These observations confirm the value of the phonocardiogram and the jugular venous pulse in the estimation of the severity of pulmonary hypertension in such patients. It is suggested that this simple procedure may prove of value in the preoperative assessment and postoperative follow-up of patients with ventricular septal defects.
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