title: The transient appearance of collateral circulation during coronary spasm.
abstract: This article reports a case of transient augmentation of collateral circulation due to spontaneous coronary arterial spasm during angiography. The patient's electrocardiogram revealed ST-segment depression during vasospastic attack; this depression differs from the typical change of the ST-segment elevation in coronary spasm without collateral circulation.
authors.affiliation: Second Section of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Tao Yuan, Taiwan.
authors.forename: S H
authors.initials: SH
authors.lastname: Chang
authors.forename: C
authors.initials: C
authors.lastname: Wang
authors.forename: C C
authors.initials: CC
authors.lastname: Chen
authors.forename: H L
authors.initials: HL
authors.lastname: Huang
authors.forename: M S
authors.initials: MS
authors.lastname: Chern
authors.forename: I C
authors.initials: IC
authors.lastname: Hsieh
mesh_terms: D003097:Collateral Circulation; D017023:Coronary Angiography / Q000009:adverse effects; D003329:Coronary Vasospasm / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged