Coronary angioplasty is used:
In an emergency, to treat people who are having a heart attack (myocardial infarction), or have recently had one. Coronary angioplasty is used to open up blocked arteries that have caused the heart attack, allowing blood to flow to the affected area of the heart and reducing heart damage. Coronary angioplasty (and stent placement) can be life-saving for people with a heart attack.
This is a companion discussion topic for the original article at https://patient.info/heart-health/coronary-angioplasty-leaflet