Angina pectoris is caused by transient myocardial ischemia due to decreased coronary flow, manifested as episodic retrosternal pain, smothering and choking, etc.

• 心绞痛由于冠状动脉供血不足；心肌暂时性缺血引起发作性胸骨后疼或胸闷憋气等症状.