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Cardiovascular reactivity in Malay Moslems during Ramadan

R Husain1, S H Cheah, M T Duncan

  • 1Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.

Singapore Medical Journal
|August 1, 1996
PubMed
Summary
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Observance of Ramadan in Malaysia did not alter cardiovascular reactivity to cold stress. However, blood pressure and vascular resistance increased during Ramadan, even without cold stimulus.

Area of Science:

  • Physiology
  • Cardiovascular Research
  • Islamic Studies

Background:

  • The observance of Ramadan involves significant daily fasting.
  • Potential physiological impacts of Ramadan fasting on cardiovascular health require investigation.
  • Previous studies show varied effects of Ramadan on circulatory parameters.

Purpose of the Study:

  • To investigate the association between Ramadan observance and cardiovascular parameter modifications in Malaysian Muslims.
  • To assess cardiovascular reactivity using a cold hand immersion test during Ramadan.

Main Methods:

  • Cardiovascular reactivity was assessed using the cold hand immersion test.
  • Blood pressure and vascular resistance were measured.
  • Data collected during Ramadan was compared to baseline or non-Ramadan periods.

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Main Results:

  • An increase in blood pressure and vascular resistance was observed during Ramadan, independent of cold stimulus.
  • The magnitude of maximal cardiac and vascular response to cold stress, as indicators of reactivity, remained unaffected by Ramadan observance.

Conclusions:

  • Ramadan observance in Malaysia is associated with altered resting circulatory parameters (blood pressure, vascular resistance).
  • Cardiovascular reactivity to acute stress (cold immersion) is not significantly modified by Ramadan observance in this population.