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[Functional capabilities of the papillary muscles of the left heart in rats during adaptation to high altitude conditions]. 1976

S B Daniiarov, and A Kh Karasaeva, and T N Naumova

The amplitude of papillary muscles shortening at gradual increase of the rate of stimulation from 12 to 60, 120 180/min in conditions of permanent high altitude hypoxia on 3rd, 15th, 30th, and 45th day of adaptation noticeably increased at 180/min stimulation starting from the 15th day of mountain exposure and remaining till the 30th and 45th day. The performance of the muscles had been considerably decreased as compared with the control tests, on the 3rd day of adaptation.

UI MeSH Term Description Entries
D008297 Male Males
D009200 Myocardial Contraction Contractile activity of the MYOCARDIUM. Heart Contractility,Inotropism, Cardiac,Cardiac Inotropism,Cardiac Inotropisms,Contractilities, Heart,Contractility, Heart,Contraction, Myocardial,Contractions, Myocardial,Heart Contractilities,Inotropisms, Cardiac,Myocardial Contractions
D010210 Papillary Muscles Conical muscular projections from the walls of the cardiac ventricles, attached to the cusps of the atrioventricular valves by the chordae tendineae. Muscle, Papillary,Muscles, Papillary,Papillary Muscle
D000222 Adaptation, Physiological The non-genetic biological changes of an organism in response to challenges in its ENVIRONMENT. Adaptation, Physiologic,Adaptations, Physiologic,Adaptations, Physiological,Adaptive Plasticity,Phenotypic Plasticity,Physiological Adaptation,Physiologic Adaptation,Physiologic Adaptations,Physiological Adaptations,Plasticity, Adaptive,Plasticity, Phenotypic
D000531 Altitude A vertical distance measured from a known level on the surface of a planet or other celestial body. Altitudes
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000860 Hypoxia Sub-optimal OXYGEN levels in the ambient air of living organisms. Anoxia,Oxygen Deficiency,Anoxemia,Deficiency, Oxygen,Hypoxemia,Deficiencies, Oxygen,Oxygen Deficiencies
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus

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