PTCA refers to percutaneous transluminal coronary angioplasty, a treatment for atherosclerotic narrowing of the lumen of the coronary arteries. PTCA involves delivering a catheter with a balloon into the narrowed coronary artery and then expanding the balloon to dilate the narrowed part of the vessel to achieve blood flow. PTCA is suitable for patients with incomplete stenosis of coronary arteries with stenosis of 75% or more; isolated, centripetal, limited, non-calcified lesions of single or multiple coronary arteries with a length of less than 15mm; restenosis after PTCA with clinical symptoms; and newly occurring complete obstruction of a single coronary artery with restenosis of a coronary artery bypass graft vessel. It should be noted that patients with severe cardiac and renal insufficiency, bleeding disorders, heart failure, and complete coronary artery obstruction with severe calcification should not be selected for PTCA surgery. Whether to choose PTCA surgery needs to go to a regular hospital and be judged by a specialist based on the patient’s own test results and disease conditions.