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sympathetic |
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| There might also be impingement of the plexus of the carotid sheath that produces irritation of the sympathetic nerves. However, the time constant for activation of sympathetic fibers[18,29,30] and for vasoconstriction following direct stimulation of sympathetic nerves is known to be less than 10 seconds. The results of these studies may explain the efficacy of beta-blockers, drugs that block the activity of sympathetic nerves, in the prevention of sudden cardiac death," Chen says. |
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