obsolete_Prinzmetal's angina true coronary artery spasms MedDRA:10011088 coronary vessel spasms SNOMEDCT:87343002 SNOMEDCT:23687008 Wikipedia:Prinzmetal's_angina ICD9:413.1 Potentially caused by mutations in smooth muscle K+ channel. A syndrome typically consisting of angina (cardiac chest pain) at rest that occurs in cycles. It is caused by vasospasm, a narrowing of the coronary arteries caused by contraction of the smooth muscle tissue in the vessel walls rather than directly by atherosclerosis (buildup of fatty plaque and hardening of the arteries). Prinzmetal angina Sirarat Sarntivijai coronary artery spasm http://purl.obolibrary.org/obo/MONDO_0006021 NCIt:C66915 angina inversa Replaced by Mondo term MONDO_0006021, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0006021 coronary vessel spasm 3.88.0 variant angina