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The response of the cardiovascular system to a dosed physical load in patients with mitral stenosis


, : The response of the cardiovascular system to a dosed physical load in patients with mitral stenosis. Kardiologiya 3(2): 23-27

Under investigation was the reaction of the cardiovascular system in patients with mitral stenosis to a graded physical load, and this was followed by an analysis of causes underlying the variability of this reaction in different patients, done through a study of the cardiac contraction mechanism prior to and after loading. A 2 stage foreman's trial-test was taken to serve as a functional loading. Examinations covered a total of 70 patients suffering from mitral stenosis. The assessment of changes was effected by means of synchronously recorded dynamocardiograms, phonocardiograms and electrocardiograms. The available evidence indicated possible existence of 2 types of reaction to physical loading in mitral stenosis:[long dash]moderate and intensive. The 1st of these is characterized by a slight acceleration of the cardiac and respiration rhythm, insignificant changes in dynamo-cardiographic intervals and cardiac contraction phases. The intensive type of the reaction yields a brusque acceleration of the cardiac and respiration rates, well pronounced changes of the dynamocardiographic intervals and sharp phasic shifts. The moderate type of the reaction testifies to a relatively normal functional capacity of the circulatory system. Its intensive type, on the other hand, points to the depletion of all reserve capacities in the circulatory system. The prominence of the cardiovascular response to physical loadings in patients with mitral stenosis is related to the degree of the left atrioventricular orifice constriction.

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