title: [Indicators of bioelectric activity of the myocardium and gas exchange in threshold physical exertion of old patients with ischemic heart diseases].
abstract: ECG, pulmonary ventilation and gas exchange were recorded in 36 patients with ischemic heart disease and in 8 practically healthy persons of advanced age bearing a stepwise increasing physical load. In case of an obvious ischemic heart disease the tolerance of physical exertions was found to decline. Under a threshold physical load such patients demonstrate an excess ventilation; a decreased oxygen pulse and a lesser increment of the respiratory quotient, as well as a reduced coefficient of recovery, of the restored oxygen consumption rate, the respiratory rate, minute respiratory volume after exertion. In cases of a possible ischemic heart disease at advanced age the tolerance of physical efforts and a number of spiroergometric indices under a threshold load continue at the same level as in healthy people.
mesh_terms: D000367:Age Factors; D000368:Aged; D003327:Coronary Disease / Q000503:physiopathology*; D004562:Electrocardiography; D005080:Exercise Test; D006321:Heart / Q000503:physiopathology*; D006801:Humans; D008168:Lung / Q000503:physiopathology*; D008875:Middle Aged; D009206:Myocardium / Q000378:metabolism; D010101:Oxygen Consumption; D005082:Physical Exertion; D012119:Respiration; D013147:Spirometry
vernacular_title: Pokazateli bioelektricheskoĭ aktivnosti miokarda i gazoobmena pri porogovoi fizicheskoĭ nagruzke u bol'nykh ishemicheskoĭ bolezn'iu serdtsa pozhilogo vozrasta