Angioplasty is a coronary surgery procedure which is necessary in situations when arteries are narrowed or blocked, so the heart is not getting enough of the blood and oxygen. During this procedure, the problematic arteries are widened, so they can carry blood and oxygen to the heart again, and this organ can function normally without the need for the open heart surgery. Generally, this procedure is considered to be safe and complications are rare, but however, they are possible. They can be divided into two groups, the group of acute complications, happening either during the procedure, or right after it has been done, and long-term complications, which tend to happen some time after the surgery, sometimes even several months later. These complications can happen even after the successful surgeries, and they are usually related to the narrowing of the artery, which results in chest pain again.