冠状动脉再成形术又名球囊动脉成形术、经皮腔内冠状动脉成形术（Percutaneous transluminal coronary angioplasty，简称PTCA），也称作经皮冠状动脉介入治疗（Percutaneous coronary intervention，简称PCI），俗称通波仔，是一种医学手术，为最常见的血管再成形术（Angioplasty），专治心肌梗塞、心脏病、冠心病。在世界已经应用有30年历史。手术方法是，伸一条小管，沿动脉通往心脏，在冠状动脉内植入支架，开通闭塞的血管，改善其收窄的情况

Percutaneous coronary intervention (PCI), commonly known as coronary angioplasty or simply angioplasty, is a non-surgical procedure used to treat the stenotic (narrowed) coronary arteries of the heart found in coronary heart disease. These stenotic segments are due to the buildup of the cholesterol-laden plaques that form due to atherosclerosis. PCI is usually performed by an interventional cardiologist, though it was developed and originally performed by interventional radiologists.