Abstract
Although there remains particular concern about late malignant ventricular arrhythmias arising from myocardial damage induced by catheter ablation, the extent of myocardial injury resulting from clinical ablation procedures has not been fully studied. We conducted a prospective, controlled study to investigate the use of two newer markers of myocardial integrity, troponin-T concentration and creatine kinase isoforms, and a traditional marker, creatine kinase-MB concentration, in the assessment of myocardial injury following radiofrequency catheter ablation. The study population consisted of 28 consecutive patients subjected to radiofrequency catheter ablation, and the control group comprised eight subjects undergoing diagnostic electrophysiology study. Prior to ablation and at 30 min, 1, 2, 6, and 12 h following the procedure, blood samples were taken to measure troponin-T and creatine kinase-MB concentrations, and the separation of creatine kinase isoforms (MM3/MM1 and MB2/MB1 ratios). The troponin-T concentration was above normal in all but two patients following radiofrequency ablation, and the MB2/MB1 ratio was raised in all but one patient following ablation, but was also abnormal in the pre-ablation samples in seven patie...Continue Reading
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