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Ann Thorac Surg 1995;59:658-662
© 1995 The Society of Thoracic Surgeons

Comparison of the Carpentier and Duran Prosthetic Rings Used in Mitral Reconstruction

Departments of Thoracic and Cardiovascular Surgery, and Cardiology, Kobe General Hospital, Kobe, Japan

Accepted for publication November 14, 1994.

This clinical study was undertaken to evaluate the Duran flexible ring and the Carpentier rigid ring in terms of mitral annulus motion, transmitral flow and left ventricular function. Twenty-six patients (11 receiving rigid rings and 15, flexible rings) with normal sinus rhythm and with no or only trivial mitral valve regurgitation after surgical repair were selected. Angiograms demonstrated no significant differences in left ventricular systolic function between the two groups of patients. The area of the mitral annulus with the flexible ring significantly changed during the cardiac cycle. There were significant differences in the left ventricular fractional shortening (rigid ring, 35.8%; flexible ring, 43.4%) and in the peak velocity (rigid ring, 222 cm/s; flexible ring, 186 cm/s) at peak exercise. These data suggest that the flexible ring interferes less with the normal movements of the mitral annulus during the cardiac cycle, and that, under exercise conditions, it performs better than the rigid ring. We therefore conclude that mitral valve reconstruction using the Duran flexible ring is advantageous in patients with mitral regurgitation due to degenerative disease and sinus rhythm.

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Invited Commentary

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Ann. Thorac. Surg. 1995 59: 662-663. [Extract] [Full Text]

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