University of Virginia Health System May 22 2025 A potentially lifesaving new smartphone app can help people determine if they are suffering heart attacks or strokes and should seek medical attention, a clinical study suggests. The ECHAS app (Emergency Call for Heart Attack and Stroke) is being developed by experts at UVA Health, Harvard, Northeastern and other leading institutions. It is designed to help people recognize the signs of cardiac and neurological emergencies so that they get care