title: [X syndrome: does left ventricular myocardial perfusion suffer during exercise?].
abstract: Sixteen patients with the X syndrome underwent thallium-201 myocardial scintigraphy. Eleven patients with one-coronary artery disease served as a control group. During bicycle ergometry all the 16 patients showed various degrees of local myocardial perfusion impairments. The foci were located in the basins of various coronary vessels. Impaired myocardial perfusion in patients with the X syndrome was similar to that in patients with moderate, but hemodynamically significant stenosis of a coronary artery. At the same time the impairments were significantly less pronounced than in those with critical stenosis of a coronary artery. Thus, patients with the X syndrome have not only clinical signs of coronary heart disease (anginal episodes), but they also have marked myocardial perfusion impairments during exercise.
authors.forename: D G
authors.initials: DG
authors.lastname: Ioseliani
authors.forename: I V
authors.initials: IV
authors.lastname: Kliuchnikov
authors.forename: A N
authors.initials: AN
authors.lastname: Koval
authors.forename: M Iu
authors.initials: MIu
authors.lastname: Smirnov
mesh_terms: D000328:Adult; D000787:Angina Pectoris / Q000000981:diagnostic imaging / Q000503:physiopathology; D003326:Coronary Circulation; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000503:physiopathology; D005080:Exercise Test; D006801:Humans; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011877:Radionuclide Imaging; D013577:Syndrome; D013794:Thallium Radioisotopes; D016277:Ventricular Function, Left
chemical_list: D013794:Thallium Radioisotopes
vernacular_title: Sindrom X: stradaet li perfuziia miokarda levogo zheludochka pri nagruzke?