Alyesh DM, et al. - Researchers focused on cardiac computed tomography (CT)-detected prevalence of myocardial calcifications as well as the advantage of mapping and ablation focusing on nontolerated ventricular tachycardias (VTs). Prior to undergoing a VT ablation procedure, 56 consecutive postinfarction patients underwent a cardiac CT. A control group, which had another 56 consecutive patients with previous infarction without VT who had cardiac CTs, was also included. In patients with previous infarction, an association of myocardial calcifications detected by cardiac CT with VT was seen. The calcifications corresponded to areas of unexcitability and represented a fixed boundary of reentry circuits that could be seen by CT. In >1/3 of patients with postinfarction VT, calcifications corresponded to effective ablation sites.