In general, major complications such as heart attack, abnormal heart rhythm, stroke, injury to the blood vessels, major bleeding, drug allergy, weakened kidney function, need for emergency surgery, and death is very rare and occur in less than 1% of patients undergoing Angioplasty. This risk depends on the complexity of blockages and the patient’s underlying medical conditions, and may therefore be higher if the patient has other comorbid conditions, e.g. advanced age, renal failure.
Other less serious complications occur uncommonly in 1-3% of patients and include bleeding, bruising and swelling of the puncture site, and blood clot formation in the artery where the sheath is inserted. The other risks are related to local anaesthesia, sedation, and blood transfusion. Overall, the procedure is very safe and well-tolerated. Your cardiologist will go through with you in detail the specific risks involved before the procedure.