[Enzyme liberation after electrical His bundle ablation].

The release of isoenzymes, i.e. aspartate aminotransferase (ASAT), lactic dehydrogenase (LDH), malic dehydrogenase (MDH), and of creatine kinase (CK) after electric His bundle ablation is presented. The enzyme release is increasing with the amount of energy applied during the intervention. Mitochondrial MDH and ASAT were found in six of the seven patients. Therefore, the size of myocardial necrosis by ablation can be estimated by the sequence of the release of the enzymes, and the isoenzymes, respectively.