Albanese M, et al. - In this retrospective cohort study, researchers used the Duisburg Heart Center cardiac patient registry to identify patients with transmural acute myocardial infarction (AMI) recovering from percutaneous coronary intervention (PCI) undertaken within 12 hours of symptom onset and without antecedent thrombolysis. In these patients, the incidence and timing of in-hospital malignant ventricular arrhythmias, sudden cardiac or arrhythmic death (SCD/AD) and resuscitation requirements were determined. They reported the occurrence of most of the post-PCI malignant ventricular arrhythmias, SCD/AD and resuscitation episodes within 96 hours of transmural AMI (76.7%). The occurrence of a substantial minority (12.6%) of these events was documented within 240–360 hours after symptom onset.