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Terminal Warm Blood Cardioplegia in Mitral Valve Replacement: Prospective Study

Division of Cardiovascular and Thoracic Surgery, Songkhlanagarind Hospital, Department of Surgery, Prince of Songkla University, Songkhla, Thailand

For reprint information contact: Chareonkiat Rergkliang, MD Tel: 66 74 451 401 Fax: 66 74 429 384 Email: chareonkiat{at}yahoo.com, Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Prince of Songkla University, Had Yai, Songkhla, Thailand 90110.

Terminal warm blood cardioplegia has had a profound impact on cardiac surgery, especially in coronary artery bypass surgery, but there have been few studies on its use in mitral valve replacement. The purpose of this study was to determine whether terminal warm blood cardioplegia offers any advantages in mitral valve replacement. Forty patients with mitral valve disease were prospectively randomized to one of two groups of 20 with different techniques of myocardial protection: group A had cold blood cardioplegia, and group B had cold blood cardioplegia with terminal warm blood cardioplegia. Intraoperative and postoperative variables were used to assess primary outcomes. Postoperative troponin T release was measured as a secondary outcome. Improved spontaneous recovery of sinus rhythm was observed in group B, but the difference was not significant. The maximum doses of inotropics, duration of inotropic support, intensive care unit stay, and postoperative left ventricular ejection fraction were similar in both groups. Troponin T release at 0 and 6 h postoperatively was not different between the two groups. This study did not find any benefit of terminal warm blood cardioplegia in either clinical outcome or troponin T release after mitral valve replacement.