Attachaipanich T, et al. - Whether fragmented QRS (fQRS) could predict in-hospital life-threatening arrhythmic complications in ST-elevation myocardial infarction (STEMI) patients was assessed as well as the most appropriate duration of cardiac rhythm monitoring in STEMI patients with fQRS. They recruited patients diagnosed with and treated for STEMI at Siriraj Hospital. Findings revealed that in-hospital life-threatening arrhythmic events in STEMI patients were independently predicted by the presence of fQRS complex on admission ECG. They observed that patients with fQRS may require cardiac rhythm monitoring longer than 24–48 hours, as the time to last life-threatening arrhythmic event from admission was found to be longer in fQRS vs non-fQRS.