A heart attack can happen as a result of a narrowed or blocked artery. This prevents oxygenated blood from reaching all the areas of the heart. Sometimes, the artery can be opened up with a procedure called angioplasty. While this is not a surgery and typically does not require anesthesia, it is still considered a minimally invasive procedure.
Angioplasty involves inserting a small hollow tube into or near the blocked artery. A balloon on the end of the tube is inflated. This pushes open the artery walls so that blood flows better. Often, a small mesh tube called a stent is placed inside the artery. It props the artery open and helps keep it from closing up again. Very rarely, during the procedure, a laser or other device is sometimes used to dissolve or cut away artery-clogging plaque.