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Original Articles: Adult Cardiac

Cardiac Resynchronization Therapy: Long-Term Alternative to Cardiac Transplantation?

^a Department of Cardio-Thoracic Surgery, Heart- and Diabetes Center North-Rhine Westfalia, Ruhr-University Bochum, Bad Oeynhausen, Germany
^b Department of Cardiology, Heart- and Diabetes Center North-Rhine Westfalia, Ruhr-University Bochum, Bad Oeynhausen, Germany

Accepted for publication September 29, 2008.

^_* Address correspondence to Dr Hansky, Department of Cardio-Thoracic Surgery, Heart- and Diabetes Center North Rhine-Westfalia, Ruhr-University Bochum, Georgstrasse 11, Bad Oeynhausen, 32545, Germany (Email: bhansky{at}hdz-nrw.de).

Background: Cardiac transplantation remains the gold standard for treating end-stage heart failure. However, because of donor shortage and posttransplant complications alternative options are needed.

Methods: We investigated the impact of cardiac resynchronization therapy on clinical outcome in 545 patients with left bundle-branch block and interventricular asynchrony, who fulfilled the cardiac criteria for cardiac transplantation listing. Primary end point was heart failure death. Secondary end points were New York Heart Association class, functional (cardiopulmonary exercise tolerance, 6-minute hall walk distance), and morphologic (left ventricular end-diastolic diameter) factors.

Results: The average follow-up period was 39.6 months (standard deviation, 26.1 months). In total, 1,784 years of observation were accrued. The percentage of nonresponders (no functional and morphologic improvement during follow-up) was 21.2%. One-year and 3-year freedom from heart failure death was 92.3% and 77.3%, respectively. Functional variables improved, but the left ventricular end-diastolic diameter decreased during the first 6 months of cardiac resynchronization therapy only in patients who survived during follow-up. Under cardiac resynchronization therapy, 42.5% (n = 34) of the cardiac transplantation candidates with atrial fibrillation at baseline returned to sinus rhythm.

Conclusions: Our data suggest that cardiac resynchronization therapy is a reliable long-term therapeutic option for the treatment of end-stage heart failure and intraventricular asynchrony.

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