https://www.webmd.com › Heart Disease › Reference
Feb 20, 2017 - If one of these arteries or branches becomes blocked suddenly, a portion of the heart is starved of oxygen, a condition called "cardiac ischemia." If cardiac ischemia lasts too long, the starved heart tissue dies. This is a heart attack, otherwise known as a myocardial infarction -- literally, "death of heart muscle.

I recently had a renal infarct which basically meant the blood supply to the kidney was interrupted thus killing part of the kidney.