vasovagal syncope


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.

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.
References in periodicals archive ?
In the assessment of primary outcomes-free survival, patients with cardiogenic syncope and syncope from unknown origin had significantly higher rates of adverse outcomes compared with vasovagal syncope and postural hypotension.
Steep fall in cardiac output is main determinant of hypotension during drug-free and nitroglycerine-induced orthostatic vasovagal syncope. Heart Rhythm 2008; 5: 1695-701.
The patient's history of vasovagal syncope was certainly indicative of increased susceptibility to reflex-mediated events, thus supporting our hypothesis.
(2002) tested this procedure by recruiting 21 participants predisposed to vasovagal syncope, and subjecting them to a tilt table test while they performed the applied tension maneuver.
ii) Vasovagal syncope Vasovagal syncope is the most common cause of acute brief unconsciousness.59 It is far more prevalent than anaphylaxis.
He succeeded great researches on pacemakers and vasovagal syncope. In cardiology, when you think about dual chamber pacemakers, neurally mediated syncope, he is the first to be remembered.
The topics include arterial blood pressure waveform analysis and its applications in assessing vasovagal syncope, heart rate variability analysis for monitoring fetal distress and neonatal critical care, bariatric surgery and its effects on heart rate variability, heart rate variability in congestive heart failure, and heart rate variability and depression.
Vasovagal syncope is the most common form of fainting, caused by a sudden drop in blood pressure in response to triggers like scary thoughts, seeing blood or standing too long.
And now Rachel understood that the vasovagal syncope did have significance.
Waldman and associates (17) in a prospective study of 790 blocks in 215 patients, found two dural punctures, two episodes of vasovagal syncope, and one late superficial infection.
Low resting blood pressure, especially in rapidly growing teenagers, can predispose your patients to vasovagal syncope. Patients with low resting blood pressure often have a lower threshold for syncope, compared with children with normal pressure.