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Ann Thorac Surg 1981;31:111-116
© 1981 The Society of Thoracic Surgeons

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Articles

Results of Aortic Valve Replacement in Patients with a Narrow Aortic Annulus: Effects of Enlargement of the Aortic Annulus

First Department of Surgery, Osaka University School of Medicine, Osaka, Japan

Accepted for publication March 24, 1980.

^* Address reprint requests to Dr. Mori, First Department of Surgery, Osaka University School of Medicine, 1–1–50 Fukushima, Fukushimaku, Osaka, Japan 553

Among 71 patients who underwent aortic valve replacement with a Björk-Shiley prosthesis, 13 (18.3%) had concomitant enlargement of the aortic annulus at the noncoronary cusp. Mean age of the 13 patients at operation was 34.4 years. Nine of them had combined mitral stenosis. One patient died in the early postoperative period, for an operative mortality of 7.7%.

The aortic annulus before enlargement was 20.9 mm and after enlargement, 24.3 mm on the average. The net increase in diameter of the aortic annulus was 3.3 mm, which was statistically significant (p < 0.005).

The tissue diameter of the prosthesis was 1.2 mm larger on the average than the aortic annulus diameter before enlargement, and a prosthesis at least one size larger could be implanted in the narrow aortic annulus.

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