neurocardiogenic syncope


syncope

 [sing´kah-pe] faint. adj. adj syn´copal, syncop´ic.cardiac syncope sudden loss of consciousness, either with momentary premonitory symptoms or without warning, due to cerebral anemia caused by ventricular asystole, extreme bradycardia, or fibrillation" >ventricular fibrillation.laryngeal syncope tussive syncope.neurocardiogenic syncope a particularly serious type of attack" >vasovagal attack; the etiology is unknown.stretching syncope syncope associated with stretching the arms upward with the spine extended.swallow syncope syncope associated with swallowing, a disorder of atrioventricular conduction mediated by the vagus nerve.tussive syncope brief loss of consciousness associated with paroxysms of coughing.vasovagal syncope vasovagal attack.

neurocardiogenic syncope

A syncope with a psychogenic substrate and predisposition to bradycardia, hypotension and peripheral vasodilation.
 
Clinical findings
Abrupt loss of vascular tone; nausea; diaphoresis; pallor.
 
Diagnosis
Tilt test, in which the patient is placed on a tilt table at a 40º to 80º angle from horizontal and maintained in a motionless upright position for 10–15 minutes or more.
 
Management
Beta blockers—e.g., metoprolol, theophylline, disopyramide.
Mechanism
Uncertain; probably activation of myocardial mechanoreceptors (C fibres), with decreased efferent sympathetic tone and increased efferent parasympathetic tone.

neurocardiogenic syncope

Vasovagal syncope A syncope with a psychogenic substrate, and predisposition to bradycardia, hypotension, peripheral vasodilation, syncope Clinical Abrupt loss of vascular tone, nausea, diaphoresis, pallor Treatment Beta blockers–eg, metoprolol, theophylline, disopyramide