title: X-syndrome: myocardial perfusion during stress testing.
abstract: Stress T1-201 myocardial scintigraphy was carried out in 16 patients with X-syndrome. 11 patients with ischaemic heart disease (IHD) with single vessel disease served as controls. With bicycle exercise test all 16 pts with X-syndrome had various types of myocardial perfusion abnormalities. These perfusion defects were situated in the vascular beds of different coronary arteries. Myocardial perfusion defects in patients with X-syndrome were similar to those in patients with moderate, but haemodynamically significant, single vessel disease. At the same time, these perfusion defects were significantly less pronounced than those in patients with subtotal occlusion of one coronary artery. Thus, patients with X-syndrome not only have clinical features of IHD (anginal attacks), but have marked stress-induced myocardial perfusion defects.
authors.affiliation: Department of Emergency and Interventional Cardiology, Bakulev's Institute of Cardiovascular Surgery, Russian Academy of Medical Science, Moscow.
authors.forename: D
authors.initials: D
authors.lastname: Iosseliani
authors.forename: I
authors.initials: I
authors.lastname: Kluchnikov
authors.forename: A
authors.initials: A
authors.lastname: Koval
authors.forename: M
authors.initials: M
authors.lastname: Smirnov
authors.forename: P
authors.initials: P
authors.lastname: Bhattacharya
mesh_terms: D000328:Adult; D000787:Angina Pectoris / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging / Q000503:physiopathology; D004562:Electrocardiography; D005080:Exercise Test; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000503:physiopathology; D011877:Radionuclide Imaging; D013577:Syndrome; D013794:Thallium Radioisotopes
chemical_list: D013794:Thallium Radioisotopes