Comparison of Cardiovascular Responses to Cold Stress of Summer and Winter Over Members in Antarctica.

Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF-810481460&userType=user&freeTextValue=Comparison+of+Cardiovascular+Responses+to+Cold+Stress+of+Summer+and+Winter+Over+Members+in+Antarctica.

Brief Description (Abstract):

Nine subjects each from eleventh Summer and eighth Wintering teams were studied to compare the changes in the cardiovascular reactivity to cold exposure. Cold immersion test (CT) was carried out on these subjects on three occasions and simultaneous record of pain threshold time, blood pressure, heart rate (ECG) were obtained. The results show that the normal reactivity of cardiovascular system to cold exposure gets attenuated after acclimatization in Antarctic environment. The short summer exposure was sufficient to increase the cold induced pain threshold. However, it lasted only for three weeks whereas for winter groups the acclimatization was for a longer period. This indicates different mechanism of acclimatization for the two groups.

Status: Completed

Purpose: Adaptation to cold results in an increase in the peripheral blood flow in human subjects. The duration and intensity of cold exposure controls the responses to cold exposure. Adaptation to cold is evidenced by enhanced capacity for heat production, or by modification in the cardiovascular responses in human subjects. Cold pressor test or cold immersion test (Singh et al.,1991) is a common autonomic function test which is utilised to study cold adaptation as well as sympathetic nervous system activation in human subjects. The measurement of pain threshold time (PTT) during cold immersion test has also been used as an index of pain tolerance (Leblanc et al.,1960 and Dowling et al.,1983).

Presentation Format: Documentdigital

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Supplemental Information:

TableDigital

Keyword(s): Earth Science-Human Dimensions,

Place/Location(s): Maitri, Antarctic,

Project: Comparison of Cardiovascular Responses to Cold Stress of Summer and Winter Over Members in Antarctica,

Topic Category(s): Health,

Date(s): 2020-09-15 (Creation),

Resource Contact(s):
1. Name : Dr. Bimal Chhajer
    Role : PrincipalInvestigator
    Phone : 8322525515
    E-Mail : ictd [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Distributor Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : Distributor
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Metadata Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : PointOfContact
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Extent:
Start Date : 1991-01-01
End Date   : 1992-12-31