冠状动脉疾病（英语：coronary artery disease, CAD）又称为缺血性心脏病或简称冠心病（英语：ischemic heart disease, IHD）、冠状动脉粥状硬化心脏病、冠状动脉粥状硬化心血管疾病（英语：coronary atherosclerotic heart disease, CAHD）和冠状动脉心脏病（英语：coronary heart disease），是一群包含稳定型心绞痛、非稳定型心绞痛、心肌梗塞和猝死的疾病。冠状动脉疾病是最常见的心脏血管疾病。常见的症状包括胸痛或不适，有时会转移到肩膀、手臂、背部、颈部或下颚。有些人可能会有胸口灼热的感觉。通常症状在运动或情绪压力下出现，持续时间不超过数分钟且休息会缓解。有时会伴随呼吸困难，有时则是毫无症状。少数人以心肌梗塞为最初的表现。其他可能的并发症包含心脏衰竭或心律不整。

Coronary artery disease (CAD), also known as ischemic heart disease (IHD), is a group of diseases that includes: stable angina, unstable angina, myocardial infarction, and sudden cardiac death. It is within the group of cardiovascular diseases of which it is the most common type. A common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw. Occasionally it may feel like heartburn. Usually symptoms occur with exercise or emotional stress, last less than a few minutes, and get better with rest. Shortness of breath may also occur and sometimes no symptoms are present. The first sign is occasionally a heart attack. Other complications include heart failure or an irregular heartbeat.