vasovagal syncope

(redirected from Vagal episode)
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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 ventricular fibrillation.
laryngeal syncope tussive syncope.
neurocardiogenic syncope a particularly serious type of 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.

va·so·de·pres·sor syn·co·pe

faintness or loss of consciousness due to reflex reduction in blood pressure.
Synonym(s): vasovagal syncope

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.

vasovagal syncope

Neurocardiogenic syncope, see there.

va·so·va·gal syn·co·pe

(vā'sō-vā'găl sing'kŏ-pē)
Faintness or loss of consciousness due to increased vagus nerve (parasympathetic) activity.
Synonym(s): vasodepressor syncope.

vasovagal syncope

See FAINTING.