【摘 要】
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As a person transitions from supine to upright posture gravitational effects on the cardiovascular system (orthostatic stress) result in increases in blood pressures below heart level, and decreases i
【机 构】
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Aerospace Physiology Laboratory Department of Biomedical Physiology and Kinesiology Simon Fraser Uni
【出 处】
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BITs 2rd Annual World Cancer Congress of Cardiology-2010(201
论文部分内容阅读
As a person transitions from supine to upright posture gravitational effects on the cardiovascular system (orthostatic stress) result in increases in blood pressures below heart level, and decreases in blood pressures above heart level.As a consequence of this gravitational gradient from head to toe, blood volume below the heart increases due to blood pooling in the veins of the lower abdomen and limbs.This will induce a drop in blood pressure, which if not compensated for, will cause loss of consciousness (syncope).
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