title: [Potential for early diagnosis of myocardial contractility disorders in people working under unfavorable conditions].
abstract: As many as 76 practically healthy men, workers of the pipe rolling plant, were examined at rest and during bicycle ergometry using M-echocardiography and visual-retrieval doppler-echocardiography. At rest none of the examined manifested any disorders of myocardial contractility. During bicycle ergometry, workers engaged in physical labour, both easy and of medium gravity, showed a rise of myocardial contractility as the loading was increased (at usual temperatures). In persons engaged in hard physical labour and exposed to the heating microclimate, the stroke volume, ejection fraction and Vcf calculated according to the echocardiogram rose whereas no increment of the contraction and relaxation rates was recorded, which was recognized as a sign of depletion of myocardial contractility reserves.
authors.forename: M B
authors.initials: MB
authors.lastname: Miller
mesh_terms: D000328:Adult; D004452:Echocardiography; D005080:Exercise Test; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D008297:Male; D009200:Myocardial Contraction / Q000502:physiology*; D016273:Occupational Exposure
vernacular_title: Vozmozhnosti rannego vyiavleniia narusheniĭ sokratitel'noĭ sposobnosti miokarda u rabochikh, trudiashchikhsia v neblagopriiatnykh usloviiakh.