What Happens During A Heart Attack? Home » Questions » Heart & Cardio » What Happens During A Heart Attack? 0 Vote Up Vote Down Anonymous asked 8 years ago Can you explain what happens to my heart during a heart attack? 1 Answers 0 Vote Up Vote Down Dr Deepthi Satish Staff answered 8 years ago Hi A heart attack happens when the flow of oxygen-rich blood to a section of heart muscle suddenly becomes blocked and the heart can’t get oxygen. If blood flow isn’t restored quickly, the section of heart muscle begins to die. Regards Dr.Deepthi