In a video originally posted on TheHeart.org, Sharonne N. Hayes, M.D., a cardiologist and founder of Mayo Clinic's Women's Heart Clinic, and Rajiv Gulati, M.D., Ph.D., an interventional cardiologist in the Mayo Clinic Cardiac Catheterization Laboratory, discuss their collaborative research on spontaneous coronary artery dissection (SCAD), a rare condition in which tears of the layers of the artery wall can block normal blood flow into and around the heart.