“A widow maker heart attack is caused when the LAD artery becomes blocked.It occurs when there’s a complete blockage of the left anterior descending (LAD) artery, one of two main arteries that brings OXYGENATED blood to the heart=FOOD TO THE HEART MUSCLE (O2).  When it is blocked due to a build up of plaque it is most often deadly, hence the name “widow maker”.

American Heart Association