to examine whether intracoronary injections of acetylcholine induce coronary artery spasm in patients with vasospastic angina , incremental doses ( 20 , 30 and 50 micrograms ) were injected directly into the coronary arteries in 12 patients with variant angina ( group a : rest angina with electrocardiographic st-segment elevation during attacks ) , 19 with vasospastic angina ( group b : rest angina and/or effort angina with variable threshold in the treadmill exercise stress test ) , 11 with organic coronary artery stenosis but without angina ( group c ) , and 14 without coronary artery disease ( group d ) .
C0002963
vasospastic angina
C0002965
rest angina