This is a cross-section of a coronary artery with plaque buildup: "A" shows inserted deflated balloon catheter; balloon is inflated in "B"; "C" shows widened artery. Source: National Heart, Lung, and ...

A heart attack—also known as a myocardial infarction (MI)—is when the heart muscle does not receive enough blood flow and the heart cells begin to die. This can result from a severely decreased blood ...

The tissue was labelled using markers for specific cells. The cells lining the inside of blood vessels called endothelial cells are shown in orange. Cardiac muscle cells are in grey. Finally, in teal, ...