Health & Science What is an aortic dissection? NPR | By A Martínez Published July 14, 2026 at 4:02 AM CDT Facebook Bluesky Twitter Email Listen • 3:52 NPR's A Martinez speaks with American Heart Association's volunteer president Dr. Manesh Patel about aortic dissection, the preliminary finding of what led to Sen. Lindsey Graham's death. Copyright 2026 NPR