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Ann Thorac Surg 1990;50:89-93
© 1990 The Society of Thoracic Surgeons

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Articles

Reversibility of pulmonary artery hypertension in aortic stenosis after aortic valve replacement

Divisions of Cardiology and Cardiovascular Surgery, Mercy Hospital, Scranton, Pennsylvania USA

Accepted for publication February 5, 1990.

^_* Address reprint requests to Dr Tracy, 746 Jefferson Ave, Scranton, PA 18510.

Fifty-two surgical patients with isolated aortic valve stenosis were studied preoperatively and postoperatively to determine the incidence of pulmonary hypertension and its response to surgical intervention. Pulmonary artery systolic hypertension was classified as absent (group 1, < 30 mm Hg), mild (group 2, 30 to 39 mm Hg), moderate (group 3, 40 to 59 mm Hg), and severe (group 4, >60 mm Hg). Thirty-seven of our patients (71%) had preoperative pulmonary hypertension. There was a positive correlation between left ventricular end-diastolic pressure and both systolic and diastolic pulmonary artery pressures preoperatively ([equation]). After operation we found a decrease in mean systolic pulmonary pressure in group 4, from 85.8 ± 23 mm Hg to 41.2 ± 10.4 mm Hg (a 52% decrease, p < 0.001), and in group 3, from 48.9 ± 5.9 mm Hg to 32.1 ± 7.1 mm Hg (a 34% decrease, p < 0.001). A significant decrease in the mean diastolic pressure was found only in group 4, in which the pressure decreased from 33.7 ± 8.7 mm Hg to 26.0 ± 7.6 mm Hg (p < 0.05). The operative mortality was 1.9%. Our data indicate that pulmonary artery hypertension in aortic stenosis is common, is related to end-diastolic pressure, and can be expected to improve in the early postoperative period.

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