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Ann Thorac Surg 2005;79:1480-1485
© 2005 The Society of Thoracic Surgeons
a Cardiac Surgery Unit, Civic Hospital, Brescia, Italy
b Department of Cardiac Surgery, University of Parma, Parma, Italy
c Department of Cardiology, University of Modena and Reggio Emilia, Modena, Italy
Accepted for publication November 17, 2004.
* Address reprint requests to Dr De Cicco, U.O. di Cardiochirurgia, Spedali Civili di Brescia, Piazzale Spedali Civili, 1-25125 Brescia, Italy (E-mail: giudeci{at}libero.it).
BACKGROUND: One of the most frequent causes of reoperation after heart valve replacement is periprosthetic leakage (PPL). Previous studies have failed to determine whether PPL is linked to specific anatomic details. The aim of this study was to examine the location within the aortic annulus where PPL occurs, and to evaluate the postoperative outcome after surgical correction.
METHODS: Between January 1985 and December 2001, 28 patients underwent reoperation because of PPL after aortic valve replacement. The aortic annulus was analyzed in a clockwise format with hour 1 corresponding to the commissure between the left coronary sinus and the right coronary sinus, hour 5 to the commissure between the right coronary sinus and the noncoronary sinus, and hour 9 to the commissure between the noncoronary sinus and the left coronary sinus.
RESULTS: Overall operative mortality was 7.1% (2 patients). Repair of PPL was carried out in 8 patients whereas prosthetic valve replacement was necessary in 20 patients. Urgency or emergency operation (p < 0.0037), preoperative New York Heart Association class IV (p < 0.04), need for prosthetic valve replacement (p = 0.05), and implant of mechanical valve (p = 0.031) were independent determinants of dismal prognosis. Periprosthetic leakage occurred more frequently between hour 4 and hour 8 (19 patients), with the risk of leakage being two times greater than in other annular areas.
CONCLUSIONS: Our study suggests that PPL occurs more frequently in a specific portion of the peculiar aortic annulus. In case of PPL diagnosis, a timely reoperation might decrease operative risks by avoiding emergency procedures and unfavorable preoperative clinical conditions, and preventing prosthetic valve replacement.
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