A renaissance of provocative testing for coronary spasm?

The term variant angina, first used by Prinzmetal et al. (1) in 1959, denotes chest discomfort with classic features of angina but occurring at rest or at night (usually the early morning hours) rather than with exertional or emotional stress. The pain is often associated with ST segment elevation and is relieved by nitroglycerin. A female predominance and… (More)