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Old 07-05-2011
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Heart Blocking the Carotid Sinus Reflex!

if afferents from the carotid sinus are blocked, the BP and heart rate will rise. But if the baroreceptors in aortic arch are intact shouldn't they counter-act this rise and bring both these parameters to normal??
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Old 07-05-2011
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Originally Posted by nudrat View Post
if afferents from the carotid sinus are blocked, the BP and heart rate will rise. But if the baroreceptors in aortic arch are intact shouldn't they counter-act this rise and bring both these parameters to normal??
{Carotid baro receptor(CBR) and Aortic baro receptor(ABR)} Baroreceptor when sense rise in bp-->brain stem-->inhibitry to sympathetic and stimulatory to parasympathetic results in negative loop and fall in bp.
Now if afferent from CBR are blocked or denervated-->large change in pb and heart rate. But even though ABR is intact, CBR is considered far more superior than ABR. So compensation alone by it does not match CBR.
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