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Blood loss

en.wikipedia.org/wiki/Tachycardia Tachycardia - can incidentally be caused by hypothyroidism, it mentions blood loss and all main causes though.

Aloe can help survival during severe blood loss?
www.nationalreviewofmedicine.com/issue/2004_09_15/clinical11_16.html


I initially searched into this mainly because I was wondering whether panic/increased heart rate sped up blood flow (and therefore blood loss), (and therefore one's demise), OR, does the quickened blood flow aid the situation, seeing as the heart's natural response to blood loss is to speed up and release adrenaline as a reaction to lower available oxygen and/or volume of blood itself. Does speeding up of heart rate and blood flow enable the remaining oxygen to be distributed in a way that attempts to simulate the regular amounts.

It is mentioned that aloe increases circulation, and the rats that were injected with it during severe blood loss lived longer than rats that were injected with regular saline. However, the improved circulatory function does pose the risk of obstructing coagulation. Therefore aloe could be useful to prolong a patient's life, whilst further treatment/aid/procedures are taken to stem the blood flow, or a transfusion is made. 

So, is the natural rush of adrenaline, which is automatic in the situation of severe blood loss, helpful? Or is it an inevitable symptom, induced by hemorrhagic shock, which essentially speeds up one's demise?

Heightened heart rate and blood flow BUT lower blood pressure.

Heightened
blood flow but lower oxygen and blood volume.

If the heart slowed dramatically rather than speeding dramatically once heavy blood loss is induced, the lowered blood pressure would have an intensified impact...therefore it could be theorised that the over-compensation the heart makes in speeding faster is an attempt to normalise the body and pump oxygen to the parts that need it most. 

HOWEVER, with wounds, such as those on major arteries, like the jugular, the heavier blood flow would result in a quicker death. 

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