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Ann Thorac Surg 1990;49:413-418
© 1990 The Society of Thoracic Surgeons
First Department of Surgery, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
Accepted for publication September 27, 1989.
* Address reprint requests to Dr Mori, First Department of Surgery, Yamaguchi University School of Medicine, Ube, Yamaguchi 755, Japan.
To clarify the effectiveness of nicardipine, one of the dihydropyridine calcium channel blockers, for myocardial protection during cold potassium cardioplegic arrest in pediatric cardiac surgery, a clinical trial of nicardipine (0.25 mg/L) added to potassium cardioplegic solution was performed in children undergoing surgical repair of congenital heart diseases. Twenty patients were selected to receive nicardipine cardioplegia and 13 patients received a standard potassium cardioplegia, serving as a control group. Nicardipine cardioplegia provided better cardiac performance in the early postoperative period and reduced release of the MB isozyme of creatine kinase, as determined during a 48-hour postoperative period. These results suggest that nicardipine added to cold potassium cardioplegic solution offers additional protection for the myocardium during ischemia and postischemic reperfusion in pediatric cardiac surgery.
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