Angina pectoris.I. A variant form of angina pectoris. Preliminary report.

Prinzmetal angina. "Dr. Prinzmetal and his collaborators focus upon an interesting variant of angina pectoris which appears to be associated with temporary, recurrent spasm of a partially occluded coronary artery. In contrast to the usual angina pectoris, precordial pain in this variant is apt to come on at rest and is relieved by exercise. There is a striking elevation of the ST segment during severe attacks of pain, simulating acute myocardial infarction, but this promptly reverts to normal upon cessation of the attack" (Agress, Myron Prinzmetal. Profiles in Cardiology, 347).