title: Young adults with chest pain.
abstract: Most studies of emergency department chest pain patients exclude patients&#x003C;30-40 years old. As a result, the clinical course of these patients is poorly described. This study's objective was to identify the clinical characteristics, hospital course, and 30-day outcomes of ED chest pain patients&#x003C;40 years old. The hypothesis was that patients&#x003C;40 years old without a cardiac history and with normal electro-cardiograms (ECGs) or no cardiac risk factors would be at a&#x003C;1 per cent risk for acute coronary syndromes (ACSs) and 30-day adverse cardiovascular (CV) events.