心绞痛是一种由心肌暂时缺血、缺氧所引起的以发作性胸痛或胸部不适为主要表现的临床综合征。虽然冠状动脉炎、重度主动脉瓣狭窄或关闭不全,冠状动脉栓塞和心肌病等均可引起心绞痛,但临床上最常见的基本原因是冠心病时冠状动脉大支管腔狭窄,导致心肌缺血、缺氧。按以往传统概念,是在冠状动脉有固定狭窄使血流无法随需要而增加的基础上,由心肌需氧量增加而引起心绞痛。由于劳力、情绪激动等因素增加心脏工作和需氧量而诱发的心绞痛,总称之为劳力型心绞痛。但有的心绞痛在休息时发作,在劳力时反而很少发作或并不发作,这类休息时发作心绞痛常为冠状动脉痉挛的结果。变异性心绞痛亦由冠状 Angina is a clinical syndrome characterized by episodic chest pain or chest discomfort caused by temporary ischemia and hypoxia in the myocardium. Although coronary artery disease, severe aortic stenosis or insufficiency, coronary artery embolism and cardiomyopathy can cause angina, but the most common clinical reason is the coronary artery coronary stenosis, leading to myocardial ischemia , Hypoxia. According to the traditional concept of the past, there is a fixed coronary stenosis so that blood flow can not be increased as needed, based on increased myocardial oxygen demand caused by angina. Due to labor, emotional and other factors increase heart work and oxygen demand induced angina, collectively referred to as labor angina. However, some episodes of angina attack at rest, but rarely seizures or seizures in labor, such episodes of angina pectoris is often the result of coronary artery spasm. Variant angina is also coronally