PARAMETERS OF MICROALTERNATIONS OF AN ELECTROCARDIOGRAM AT PATIENTS WITH A CARDIOVASCULAR PATHOLOGY DURING CARRYING OUT TENSION-TESTS ArticleIvanov G.G., Dvornikov V.E., Strelnikova J.N., Zenova N.A., Elgaila А., Аhmed М.Функциональная диагностика. 2009. P.. 13-20