[Current possibilities of bloodless quantitative evaluation of the pumping function reserve of the heart based on the study of oxygen consumption during the treadmill test].
Estimations of minute circulation volume (MCV) and the recovery coefficient (RC) as a parameter of oxygen debt were compared during the treadmill test in 83 cardiologic patients and 32 normal subjects in order to assess their pumping activity. At every stage of exercise, MCV was calculated on the basis of oxygen uptake, using Hossak's formula. MCV values were similar in the patients and normal subjects at similar stages of the treadmill test, and in patients belonging to different severity classes. RC variation was, on the contrary, different and depended on the magnitude of hemodynamic disorders: as pumping insufficiency developed, there was an abrupt drop in RC. A method is proposed for the quantitative assessment of pumping functional reserve on the basis of the ratio of oxygen uptake (at the stage where RC change occurred) to the maximum achievable by a normal subject of the same age, sex and body weight.
V E
VE
Kudriashev
Iu V
IuV
Beletskiĭ
A K
AK
Labutskiĭ
S V
SV
Ivanov
D000328:Adult; D001810:Blood Volume; D005080:Exercise Test; D006322:Heart Aneurysm / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000503:physiopathology*; D008946:Mitral Valve Stenosis / Q000503:physiopathology*; D009200:Myocardial Contraction; D010101:Oxygen Consumption; D012214:Rheumatic Heart Disease / Q000503:physiopathology*
Sovremennye vozmozhnosti beskrovnoĭ kolichestvennoĭ otsenki rezerva nasosnoĭ funktsii serdtsa po potrebleniiu kisloroda organizmom vo vremia tredmil-testa.