Eugene Braunwald, a pioneering cardiologist who transformed the understanding and treatment of heart disease, died at 96. His research helped shift heart attacks from being seen as sudden, irreversible events to dynamic processes that could be limited or interrupted with timely care. His work laid the foundation for modern therapies that reduce the heart's workload, lower blood pressure and reopen blocked arteries, saving millions of lives.

Over a career spanning more than half a century, Dr. Braunwald helped establish cardiology as a rigorous scientific discipline grounded in physiology and large-scale clinical trials. He led influential studies showing that medications such as beta blockers and other heart drugs could improve survival after heart attacks and in patients with heart failure. His textbook, Braunwald's Heart Disease, became a foundational reference for physicians worldwide.

Born in Vienna in 1929, he fled Nazi-occupied Austria with his family and built a distinguished career in the United States, holding leadership roles at major medical institutions and mentoring generations of cardiologists. Though his career included a research misconduct scandal involving a trainee, he remained a central figure in cardiovascular medicine, continuing to publish and lead major studies well into his later years.