Prinzmetal angina is -
Angina after extreme exeion
Caused due to atherosclerotic blockade
Caused due to spasm of aery
Calcium channel blockers not effective
Ref: R. Alagappan Manual of Practical Medicine. 4th Edition pg no:79 Prinzmetal Angina Prinzmetal angina is a type of angina pectoris, which typically occurs during rest and may recur in a nightly cyclic pattern. ST-segment elevation or depression on the electrocardiogram and coronary aery spasm have been documented during an attack.
C.V.S