Prediction of alterations in cardiac functions (ECG data) in the course of the permanent monitoring of cosmonauts starting from selection until return to earth after short space flights |
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Authors: | A R Kotovskaya M I Koloteva V Yu Luk’yanuk G P Stepanova L M Filatova S P Builov A F Zhernavkov and L L Kondratuk |
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Abstract: | Analysis of alterations in the cardiac activity on the basis of electrocardiographic (ECG) findings in 29 cosmonauts of flight
and ground professions aged from 29 to 61 years after 34 short (8–30 days) space flights (SFs) between 1982 and 2006 has been
carried out. The ECG data at the stage of clinical selection, clinical-physiological examination (CPE) before a SF, at the
stage of the launch of a spacecraft (SC) into orbit and its landing on Earth and at the stage of postflight CPE have been
analyzed. The analysis of cardiac activity parameters on the basis of ECG data at different stages of observations has led
to the identification of three groups of cosmonauts. There were no significant changes or negative tendencies in the alteration
of ECG data in the first group (55.2% of the total number of cosmonauts) during the observation period from selection to the
end of the SF. The changes that later became more pronounced during the landing on Earth and were retained during postflight
CPE have been found in the second group of cosmonauts (in 34.5% cases) at the time of selection and preflight CPE. Considerable
disturbances in cardiac activity that are dangerous for human health have been found in ECGs in the third group (10.3%) during
the descent from orbit. The data from the study are the first step in the investigation of possible medical risks for the
development and improvement of requirements for the medical selection of crews and the admission of subjects with partial
health insufficiency on SFs. |
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