How does angina pectoris happen? Demand of the myocardium for oxygen 动脉粥样硬化斑块 normal 和血栓形成 Ischemia 冠脉痉挛 Oxygen delivery to the myocardium by the coronary circulationDemand of the myocardium for oxygen Oxygen delivery to the myocardium by the coronary circulation Normal Ischemia How does angina pectoris happen? 8 动脉粥样硬化斑块 和血栓形成 冠脉痉挛