心绞痛为一临床综合征,由于发病率日趋增高,近年来对它有较多的研究,特别是由于心血管检查技术的进展,给我们带来更进一步的了解。病因及病理生理正常情况下,心脏接受大约5%总心脏排出量,心肌从冠状动脉血液中的血红蛋白提出70～75%的氧,而全身仅提取约20%,由于心肌对氧需要量大,因此冠状动脉的血流量血氧含量较其他器官回然不同,当心肌需要量增加 Angina pectoris is a clinical syndrome. Due to its increasing incidence, it has been studied more and more in recent years, especially because of the progress of cardiovascular examination, which brings us a better understanding. Etiology and pathophysiology Under normal circumstances, the heart receives about 5% of the total cardiac output, cardiac muscle from the coronary blood hemoglobin raised 70 to 75% of the oxygen, while the body only extracted about 20%, due to myocardial oxygen demand, Therefore, coronary blood flow oxygen content than other organs back to different, when the myocardial demand increased