title: Angiographically assessed coronary collateral circulation increases vulnerability to myocardial ischemia during vasodilator stress testing.
abstract: In patients with a major coronary vessel occluded, the presence of good coronary collateral circulation increases vulnerability to myocardial ischemia induced by pharmacologic coronary vasodilation. The presence of good collaterals results in a greater frequency, severity, and extent of dipyridamole-induced regional left ventricular dysfunction, consistent with the hypothesis of angiographically assessed collaterals facilitating "steal phenomena" during dipyridamole-induced coronary vasodilation.
authors.affiliation: Institute of Clinical Physiology, C.N.R., Pisa, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Gliozheni
authors.forename: E
authors.initials: E
authors.lastname: Picano
authors.forename: L
authors.initials: L
authors.lastname: Bernardino
authors.forename: A
authors.initials: A
authors.lastname: Pingitore
authors.forename: R
authors.initials: R
authors.lastname: Sicari
authors.forename: M
authors.initials: M
authors.lastname: Marzilli
mesh_terms: D000368:Aged; D003097:Collateral Circulation; D003251:Constriction, Pathologic; D017023:Coronary Angiography; D003326:Coronary Circulation; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000503:physiopathology*; D004176:Dipyridamole; D004452:Echocardiography; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014665:Vasodilator Agents
chemical_list: D014665:Vasodilator Agents; D004176:Dipyridamole