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Ann Thorac Surg 2002;73:1130-1137
© 2002 The Society of Thoracic Surgeons

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Original article: cardiovascular

Five-year experience in aortic root replacement with the flanged composite graft

Kaan Kirali, MD*^a, Denyan Mansurolu, MD^a, Suat Nail Ömerolu, MD^a, Vedat Erentu, MD^a, lker Mataraci^a, Gökhan pek, MD^a, Esat Alcinci, MD^a, Ömer Iik, MD^a, Cevat Yakut, MD^a

^a Department of Cardiovascular Surgery, Kouyolu Heart and Research Hospital, Istanbul, Turkey

Accepted for publication December 10, 2001.

* Address reprint requests to Dr Kirali, Kouyolu Heart and Research Hospital, 81020, Kadiköy, Istanbul, Türkiye Turkey
e-mail: imkkirali{at}yahoo.com

Background. Replacement of the aortic root with a composite graft containing a prosthetic mechanic valve is the preferred surgical procedure for tailoring the aortic root. The aim of this study is to determine the 5-year experience with the composite root replacement using our new modification of the Bentall technique.

Methods. Between January 1996 and June 2001, 96 patients underwent aortic root replacement using a flanged composite graft. Eighty patients (83.3%) were male, and 16 patients (16.7%) were female with a mean age of 48.7 ± 14.4 years. Indications for operation were a true or false aneurysm (65.6%), severe calcified aortic valve stenosis (4.2%) or severe aortic insufficiency (2.1%) with dilated ascending aorta, acute dissection (2.1%), or combination of indications (26%). Thirty-one patients (32.3%) received a concomitant cardiac procedure. Mean aortic cross-clamp time was 89.5 ± 28.6 minutes, and mean cardiopulmonary bypass time was 146.2 ± 45.6 minutes. Total follow-up was 253.9 patient-years.

Results. Operative mortality was 8.3% (8 patients). The causes of hospital mortality were severe bleeding (3 patients), low cardiac output syndrome (2), acute respiratory distress syndrome (2) and cerebrovascular event (1). No patient died of flange-related complications. Univariate predictors of early mortality were low cardiac output syndrome (p < 0.001), neurologic complication (p = 0.03), and renal complication (p = 0.03). Multivariate analysis demonstrated only low cardiac output syndrome to be significant (p = 0.001) predictor for early mortality. There were five (5.7%) late deaths. Actuarial survival was 82.65% ± 4.8% at 5 years (1.95% patient-year). Cox proportional hazards regression analysis demonstrated only low cardiac output syndrome to be significant (p = 0.032) predictor for late mortality. Actuarial freedom from prosthetic- and technique-related mortality was 100% at 5 years.

Conclusions. The flanged composite graft offers excellent long-term results, with very low prevalence of prosthetic-related complications. The new created sinuses and the flange are especially helpful to continue physiologic function of the aortic root.

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