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Ulrich P. Rosendahl
Amir Mortasawi
Stefan F. Bauer
Fatmir Dalladaku
Ina C. Ennker
Juergen C. Ennker
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Ann Thorac Surg 2003;76:75-83
© 2003 The Society of Thoracic Surgeons

Original article: cardiovascular

Current determinants of operative mortality in 1400 patients requiring aortic valve replacement

Ines Florath, PhDa, Ulrich P. Rosendahl, MDa, Amir Mortasawi, MDa, Stefan F. Bauer, MDa, Fatmir Dalladaku, MD, Ina C. Ennker, MDa, Juergen C. Ennker, MD, PhDa*

a Department of Cardiothoracic Surgery, Heart Institute Lahr/Baden, Lahr, Germany

Accepted for publication February 7, 2003.

* Address reprint requests to Dr Ennker, Heart Institute Lahr/Baden, Hohbergweg 2, D-77933 Lahr, Germany
e-mail: ennker{at}heart-lahr.com

BACKGROUND: Determinants of operative mortality after aortic valve replacement vary with a changing patient population due to advances in operative management and increasing life expectancy. In order to predict current groups of high risk patients, a statistically valid large study population base recruited over a short period of time is required.

METHODS: Between January 1996 and June 2001, 1408 aortic valves were replaced in 1400 patients (572 of them with simultaneous coronary artery bypass grafting). The data were analyzed by multivariate logistic regression to evaluate the operative risk. Mean age of the study population was 68 ± 11 years (range 19 to 90 years old, 44% female).

RESULTS: Overall operative mortality (within 30 days) was 3.8%. Independent predictive factors for operative mortality were previous bypass surgery, emergency operation, simultaneous mitral valve replacement, renal dysfunction, more than 80 years old, simultaneous bypass surgery in female patients with a body mass index greater than 29 kg/m2, and height smaller than 1.57 m for patients more than 71 years old. Simultaneous coronary artery bypass grafting in general (p = 0.6), previous aortic valve replacement (p = 0.59), and implantation of stented bioprostheses (p = 0.39) or stentless bioprostheses (p = 0.7) were not identified as independent risk factors.

CONCLUSIONS: Certain groups of patients with a high operative risk were identified: patients more than 80 years old, women with a body mass index greater 29 kg/m2 undergoing simultaneous coronary artery bypass surgery, and "small" patients more than 71 years old.




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