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Aim. To evaluate the potential of qualitative and semi-quantitative analysis of stress adenosine triphosphate perfusion cardiac magnetic resonance imaging (MRI) in patients with obstructive coronary artery disease (CAD) with stenosis ≥50%.Material and methods. Cardiac adenosine triphosphate perfusion stress MRI was performed in 49 patients with suspected or diagnosed CAD. The images were assessed qualitatively and semi-quantitatively. A zone of reduced signal intensity during the first passage of a contrast bolus with stress was taken as a stress-induced perfusion defect. Semiquantitative analysis was based on the construction of signal intensity curves of the contrast agent entering the left ventricular cavity and into the myocardium.Results. The detection of stress-induced perfusion defects according to cardiac stress MRI was significantly associated with coronary artery stenosis ≥50% (p

Aim. To assess the changes in vascular wall structure and function among patients with coronary heart disease (CHD), arterial hypertension (AH), or CHD and AH combination.Material and methods. In total, 3 groups of the patients (n=120) were examined. Group I included 34 CHD patients (mean age 57,3±10,4 years; 76% men; 54% smokers). Group II included 46 patients with CHD and AH (mean age 62,4±6,5 years; 41% men; 15% smokers). Group III included 40 AH patients (mean age 56,8±9,2 years; 68% men; 30% smokers). Common carotid artery (CCA) structure was assessed by intima-media thickness (IMT). Pulse wave velocity (PWV) and augmentation index were assessed, based on the data for brachial artery. Atherosclerotic changes in lower extremity arteries were evaluated using ankle-brachial index. Other assessed parameters included CCA distensibility and stiffness β; ankle-brachial PWV, as a marker of regional artery stiffness; and brachial artery flow-dependent vasodilatation, FDVD in reactive hyperemia test.Results. Age- and gender-adjusted IMT increase was more pronounced in patients with CHD and AH (57%). This group was characterised by the lowest values of distensibility and the highest values of local CCA stiffness. The age- and gender-adjusted levels of regional artery stiffness were higher in patients with AH (49%) and participants with CHD and AH (43%).Conclusion. Patients with CHD and AH were characterised by the highest levels of vascular risk factors, vascular wall remodelling, atherosclerosis of lower extremity arteries, and increased vascular wall stiffness. FDVD was most affected in CHD patients with such risk factors as hyperlipidemia, overweight, or smoking. Therefore, vascular risk factors play a key role in endothelial dysfunction development.

The review presents the results of some large-scale clinical trials on the prognostic value of endothelial dysfunction, as a predictor of cardiovascular events. Coronary endothelial function, assessed invasively, is an independent predictor of spontaneous cardiovascular events, such as sudden cardiac death, myocardial infarction and cerebrovascular events, even after adjustment for pre-existing coronary heart disease (CHD) and other cardiovascular risk factors. Other studies demonstrated that coronary endothelial dysfunction is the strongest predictor of cerebrovascular events. Preoperative non-invasive assessment of endothelial function could independently predict postoperative cardiovascular and cerebrovascular events.