Nilsson T, et al. - Researchers compared emergency department (ED) patients presenting with ongoing, vs abated, chest pain in terms of patient characteristics and the diagnostic performance of the ECG. Among 1,132 unselected ED chest pain patients, cases with abated chest pain (n = 508) were older, had more comorbidities, and had twice the risk of index visit acute coronary syndrome (ACS) (15%) and major adverse cardiac events (MACE) at 30 days (15.6%) compared with cases with ongoing pain (n = 631; ACS 7.3%, 30-day MACE 7.4%). However, the diagnostic accuracy of the ECG for ACS did not differ between the two groups.