REACTION OF THE CARDIOVASCULAR, SYSTEM TO ORTHOSTATIC TESTING DURING EXTENDED HEAD-DOWN BED REST AS A FUNCTION OF THE COUNTERMEASURES START DATE.

Autor: Stepanova GP, Degterenkova NV, Stepanova KY
Jazyk: English; Russian
Zdroj: Aviakosmicheskaia i ekologicheskaia meditsina = Aerospace and environmental medicine [Aviakosm Ekolog Med] 2016; Vol. 50 (6), pp. 11-20.
DOI: 10.21687/0233-528x-2016-50-6-11-20
Abstrakt: The cardiovascular system (CVS) and its regulation are highly vulnerable to limited physical activity equally on Earth and in space. Purpose of the work is to study mechanical cardiac reactions to the standing test during extended head-down bed rest (BR) as a function of countermeasures start date. Subjects were 9 male volunteers. To assess the bioelectrical activity of the heart. (ECG) and mechanical activity (echoECG), the standing test was conducted during baseline data collection, every 60 days in BR, and on day 60 of recovery. The results showed a nonlinear dependence of the CVS function on time in BR. Level of orthostatic stability and time for orthostatic stability recovery were largely dependent on the scope of countermeasures applied during BR.
Databáze: MEDLINE