Undiagnosed chest pain sends 8-10 million Americans to Emergency Departments annually, making it the second most common complaint. Emergency physicians must rapidly identify patients whose chest pain is cardiac-related. A new pilot study has found that a resting 90-second magnetocardiography (MCG) scan shows promise in evaluating emergency department observation unit (EDOU) chest pain patients for Acute Coronary Artery Syndrome. The publication also indicates that CardioFlux MCG may provide additional information to support the usual clinical pathway of Stress Testing and Coronary Angiography.