Vagovagal Syncope

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Abstract
VAGOVAGAL syncope consists of hypotension and loss of consciousness associated with cardiac slowing or standstill. The afferent impulses originate in the sensory endings of the vagus nerve. These inhibit the vasomotor and cardioaccelerator centers while exciting the cardioinhibitory center. In addition to possible decreased sympathetic outflow throughout the autonomie nervous system, efferent vagal impulses to the heart may cause marked bradycardia or varying degrees of heart block. The resulting hypotension compromises cerebral blood flow and results in syncope.Vagovagal syncope may be confused with vasovagal syncope, in which a sharp decline in blood pressure is secondary to a loss of . . .