Abstract:The aim of this study was to investigate the effect of blood volume reduction (300 – 400 mL) on circulation and Heart Rate Variability (HRV), by using autologous blood donation as a model of blood volume change. In 33 adult subjects (56.3 ± 15.9yrs) with no circulatory, respiratory, or neurologic disease, we measured Blood Pressure (BP) and electrocardiographic parameters during autologous blood donation. We divided the subjects into 3 groups according to age (10–30 yrs, 40–50 yrs, and 60–80 yrs) and into 2 gr… Show more
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