Discuss the pathogenic mechanism of Prinzmetal's variant angina pectoris. 

探讨变异型心绞痛的发生机制。

Elderly; Unstable angina pectoris; Treatment.

老年；不稳定性心绞痛；治疗。

Angina pectoris, especially the so-called "effort angina".

专治心绞痛，特别是“劳累”型心绞痛。

All had angina pectoris, 4 previous myocardial infarction.

全部有心绞痛史，陈旧性心肌梗塞4例。

On angina pectoris caused by chest tightness, tingling precordial.

主治由心绞痛引起胸闷，刺痛心前区。