X-syndrome: is there impairment of myocardial perfusion during stress?
Stress T1-201 myocardial scintigraphy was carried out in 16 patients with x-syndrome. Eleven patients having IHD with single-vessel disease served as the control. With bicycle exercise test all 16 patients with x-syndrome had some type of myocardial perfusion abnormality. 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 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 a subtotal occlusion of one coronary artery. Thus, patients with x-syndrome have not only the clinical features of IHD (anginal attacks), but also marked stress-induced, myocardial perfusion defects.
Iosseliani
D
D
Department of Emergency and Interventional Cardiology, Bakulev's Institute of Cardiovascular Surgery, Russian Academy of Medical Science, Moscow.
Kluchnikov
I
I
Koval
A
A
Smirnov
M
M
Bhattacharya
P
P
D000787:Angina Pectoris / Q000000981:diagnostic imaging / Q000503:physiopathology; D003326:Coronary Circulation / Q000502:physiology*; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000503:physiopathology; D003331:Coronary Vessels / Q000000981:diagnostic imaging / Q000503:physiopathology; D004562:Electrocardiography; D004874:Ergonovine; D005080:Exercise Test; D017079:Exercise Tolerance; D006801:Humans; D017566:Microvascular Angina / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000000981:diagnostic imaging / Q000503:physiopathology; D005082:Physical Exertion / Q000502:physiology*; D015635:Radionuclide Ventriculography; D013794:Thallium Radioisotopes
D013794:Thallium Radioisotopes; D004874:Ergonovine