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presyncope causes

hydroxyzine

hydroxyzine

Hydroxyzine (the pamoate salt form of hydroxyzine, a synthetic piperazine histamine H1-receptor antagonist with anti-allergic, antispasmodic, sedative, anti-emetic and anti-anxiety properties)
ethanol

ethanol

ethanol, the alcohol found in alcoholic beverages, also known as ethyl alcohol or grain alcohol
Diphenhydramine

Diphenhydramine

Diphenhydramine hydrochloride, a chemical mainly used as an antihistamine, antiemetic, sedative, and hypnotic
Desipramine

Desipramine

Desipramine (the hydrochloride salt form of desipramine, a secondary amine tricyclic antidepressant (TCA))
propionic acid

propionic acid

L-dopa (an amino acid precursor of dopamine with antiparkinsonian properties)
Takayasu's arteritis

Takayasu's arteritis

Takayasu arteritis (a chronic inflammatory process that affects the aorta and its primary branches, such as the brachiocephalic artery (brachiocephalic trunk) and carotid arteries)
Wolff–Parkinson–White syndrome

Wolff–Parkinson–White syndrome

Wolff-Parkinson-White syndrome (a type of ventricular pre-excitation resulting from the activation of an accessory pathway known as the Bundle of Kent)
Vasovagal syncope

Vasovagal syncope

Vasovagal syncope (loss of consciousness due to a reduction in blood pressure that is associated with an increase in vagal tone and peripheral vasodilation)
Atrioventricular node conduction block

Atrioventricular node conduction block

Atrioventricular node conduction block (a pr interval of more than 0.20 seconds in adults)
cocaine

cocaine

Cocaine (an alkaloid ester extracted from the leaves of plants including coca)
Dosulepin hydrochloride

Dosulepin hydrochloride

Dothiepin (a tricyclic antidepressant with some tranquilizing action)
Cinnarizine

Cinnarizine

Cinnarizine (a piperazine derivative having histamine H1-receptor and calcium-channel blocking activity with vasodilating and antiemetic properties but it induces parkinsonian disorders)
Brugada syndrome

Brugada syndrome

Brugada syndrome (a condition characterized by a pattern of right bundle branch block (rbbb) and ST-segment elevation within electrocardiogram (ECG) leads V1-V3 )
Aortic valve stenosis

Aortic valve stenosis

Aortic valve stenosis (a pathological constriction that can occur above (supravalvular stenosis), below (subvalvular stenosis), or at the aortic valve)
chlorphenamine

chlorphenamine

Chlorpheniramine (a histamine H1 antagonist used in allergic reactions, hay fever, rhinitis, urticaria, and asthma)
amitriptyline

amitriptyline

Amitriptyline hydrochloride, a tricyclic antidepressant drug
in medicine, subclavian steal syndrome, also subclavian steal phenomenon and subclavian steal steno-occlusive disease
autonomic neuropathy, a disease of the non-voluntary, non-sensory nervous system affecting mostly the internal organs such as the bladder muscles, a cardiovascular system, a digestive tract, and the genital organs
Valsalva manouevre
Valsalva manouevre (forced expiratory effort against a closed glottis)
orthostatic hypotension, a form of hypotension in which a person's blood pressure suddenly falls when the person stands up
Atrial myxoma
Atrial myxoma (a cardiac myxoma arising from the atrium)
Mastocytosis (most common form of mastocytosis, characterized by multiple persistant small reddish brown hyperpigmented pruritic macules and papules)
Adams-Stokes attack
Adams-Stokes attack (a condition of fainting spells caused by heart block, often an atrioventricular block, that leads to bradycardia and drop in cardiac output)
Carotid sinus syndrome
Carotid sinus syndrome, the cause and medical concept with Mesh code "D013575" and DiseasesDB code "2150"
Cardiomyopathy, familial hypertrophic (an autosomal dominant inherited form of hypertrophic cardiomyopathy)
In physiology and medicine, hypotension refers to an abnormally low blood pressure
micturition syncope, a name given to the human phenomenon of fainting shortly after or during urination
Barbiturates (a drug used to treat insomnia, seizures, and convulsions, and to relieve anxiety and tension before surgery)
Nortriptyline (a metabolite of amitriptyline that is also used as an antidepressive agent)
show all (24 more) ...
Who or what is currently a cause of the phenomenon (such as a disease or weather) Syncope (a transient loss of consciousness and postural tone caused by diminished blood flow to the brain (i.e., brain ischemia))?
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External web pages (using standard web search):

Dizziness — Comprehensive overview covers types, symptoms, causes, treatments of this common health concern.
Chapter 14 - Evaluation of the “dizzy” patient Introduction. Dizziness is a common symptom in neurologic practice as well as primary care. According to the National ...
Dizziness Information Including Symptoms, Diagnosis, Treatment, Causes, Videos, Forums, and local community support. Find answers to health issues you can trust from ...
Common Causes of Dizziness. Dizziness can be broken into four categories: vertigo, presyncope, disequilibrium and lightheadedness. Each type describes a particular sensation ...
Dizziness: Vertigo, Presyncope, Syncope and Dysequilibrium Stephen E. Nadeau Geriatric Research, Education and Clinical Center, Malcom Randall Department of Veterans Affairs ...

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