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barry barry
wrote...
Posts: 11630
12 years ago
A person may have a severe allergic reaction to something like a bee sting. If this happens to someone who is severely allergic it can result in anaphylactic shock in which the blood pressure plummets, and this can be fatal. The root cause of this is an inappropriate release of histamine in response to the sting. Histamine causes massive vasodilatation, so how does this affect blood pressure?
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wrote...
12 years ago
Vasodilation increases the diameter in the blood vessels. Therefor, if histamine is released, causing the vessels to dilate, there will be a massive drop in blood pressure due to the decreased resistance on the blood flow.
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