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A member asked:
When i go from sitting or laying down to standing up my hr goes from 88 to 131 and i feel really dizzy this is affecting my life why is this happening?
A doctor has provided 1 answer
C/w ↓ed blood volume: due to dehydration, possibly anemia. HR routinely ↑es on standing due slowed blood return from veins below heart (gravity) which promptly lowers heart stroke volume resulting in brain promptly ↑ing heart rate to partly compensate/maintain heart output. Typical rate ↑ <10 BPM with normal blood volume, ↑ ed with reduced blood volume, more so if also anemic from blood loss (eg. hidden in intestines.)
Answered 3/30/2015
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