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词条 Dizziness
释义

  1. Classification

  2. Mechanism

  3. Diagnosis

     Differential diagnosis 

  4. Epidemiology

  5. See also

  6. References

  7. External links

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| caption = Depicting the character 暈 (dizziness) in the seal script of Ancient Chinese
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}}Dizziness is an impairment in spatial perception and stability.[1] The term dizziness is imprecise:[2] it can refer to vertigo, presyncope, disequilibrium,[3] or a non-specific feeling such as giddiness or foolishness.[4]

One can induce dizziness by engaging in disorientating activities such as spinning.

  • Vertigo is the sensation of spinning or having one's surroundings spin about them. Many people find vertigo very disturbing and often report associated nausea and vomiting. It represents about 25% of cases of occurrences of dizziness.[5]
  • Disequilibrium is the sensation of being off balance and is most often characterized by frequent falls in a specific direction. This condition is not often associated with nausea or vomiting.
  • Presyncope is lightheadedness, muscular weakness, and feeling faint as opposed to a syncope, which is actually fainting.
  • Non-specific dizziness is often psychiatric in origin. It is a diagnosis of exclusion and can sometimes be brought about by hyperventilation.[4]

A stroke is the cause of isolated dizziness in 0.7% of people who present to the emergency department.[5]

Classification

Dizziness is broken down into 4 main subtypes: vertigo (~50%), disequilibrium (less than ~15%), presyncope (less than ~15%) and lightheadedness (~10%).[5]

Mechanism

Many conditions cause dizziness because multiple parts of the body are required for maintaining balance including the inner ear, eyes, muscles, skeleton, and the nervous system.[6]

Common physiological causes of dizziness include:

  • inadequate blood supply to the brain due to:
    • a sudden fall in blood pressure[6]
    • heart problems or artery blockages[6]
  • loss or distortion of vision or visual cues[6]
  • disorders of the inner ear[6]
  • distortion of brain/nervous function by medications such as anticonvulsants and sedatives[6]
  • result of side effect from prescription drugs, including proton-pump inhibitor drugs (PPIs)[7] and Coumadin (warfarin) causing dizziness/fainting [8]

Diagnosis

Differential diagnosis

Many conditions are associated with dizziness. Dizziness can accompany certain serious events, such as a concussion or brain bleed, epilepsy and seizures (convulsions), strokes, and cases of meningitis and encephalitis. However, the most common subcategories can be broken down as follows: 40% peripheral vestibular dysfunction, 10% central nervous system lesion, 15% psychiatric disorder, 25% presyncope/disequilibrium, and 10% nonspecific dizziness.[9] Some vestibular pathologies have symptoms that are comorbid with mental disorders.[10] The medical conditions that often have dizziness as a symptom include:[9][11][6][12]

  • Benign paroxysmal positional vertigo
  • Meniere's disease
  • Labyrinthitis
  • Otitis media
  • Brain tumor
  • Acoustic neuroma
  • Motion sickness
  • Ramsay Hunt syndrome
  • Migraine
  • Multiple sclerosis
  • Pregnancy
  • Low blood pressure (hypotension)
  • Low blood oxygen content (hypoxemia)
  • Heart attack[13]
  • Iron deficiency (anemia)
  • Low blood sugar (hypoglycemia)
  • Hormonal changes (e.g. thyroid disease, menstruation, pregnancy)
  • Panic disorder
  • Hyperventilation
  • Anxiety
  • Depression
  • Age-diminished visual, balance, and perception of spatial orientation abilities

Epidemiology

About 20–30% of the population report to have experienced dizziness at some point in the previous year.[14]

See also

{{div col|colwidth=22em}}
  • Balance disorder
  • Broken escalator phenomenon
  • Chronic subjective dizziness
  • Coriolis effect (perception)
  • Equilibrioception
  • Ideomotor phenomenon
  • Illusions of self-motion
  • Motion sickness
  • Postural orthostatic tachycardia syndrome
  • Proprioception
  • Seasickness
  • Spatial disorientation
  • The spins, a state of dizziness and disorientation due to intoxication
  • Vertigo
{{div col end}}

References

1. ^{{DorlandsDict|three/000031973|dizziness}}
2. ^{{MeshName|Dizziness}}
3. ^{{cite book |chapterurl=http://www.dartmouth.edu/~dons/part_2/chapter_14.html#chpt_14_presyncope |chapter=Chapter 14: Evaluation of the Dizzy Patient |author=Reeves, Alexander G. |author2=Swenson, Rand S. |title=Disorders of the Nervous System: A Primer |year=2008 |publisher=Dartmouth Medical School |url=http://www.dartmouth.edu/~dons/index.html}}
4. ^{{cite web |url=http://www.uptodate.com/contents/approach-to-the-patient-with-dizziness |title=Approach to the patient with dizziness |author=Branch Jr., William T. |author2=Barton, Jason J. S. |work=UpToDate |date=February 10, 2011}}
5. ^{{cite journal |vauthors=Post RE, Dickerson LM |title=Dizziness: a diagnostic approach |journal=Am Fam Physician |volume=82 |issue=4 |pages=361–8, 369 |date=August 2010 |pmid=20704166 }}
6. ^{{cite web |title=Dizziness and Vertigo |year=2009 |publisher=Merck Manual |url=http://www.merck.com/mmpe/sec08/ch084/ch084e.html?qt=dizziness&alt=sh}}
7. ^{{cite web|url=http://www.fda.gov/Drugs/DrugSafety/ucm245011.htm|title=Drug Safety and Availability – FDA Drug Safety Communication: Low magnesium levels can be associated with long-term use of Proton Pump Inhibitor drugs (PPIs)|first=Center for Drug Evaluation and|last=Research|date=|website=www.fda.gov|accessdate=17 April 2018}}
8. ^{{cite web|url=http://www.rxlist.com/coumadin-side-effects-drug-center.htm|title=Common Side Effects of Coumadin (Warfarin Sodium) Drug Center – RxList|author=|date=|website=rxlist.com|accessdate=17 April 2018}}
9. ^{{cite journal |author=Chan Y |title=Differential diagnosis of dizziness |journal=Curr Opin Otolaryngol Head Neck Surg |volume=17 |issue=3 |pages=200–3 |date=June 2009 |pmid=19365263 |doi=10.1097/MOO.0b013e32832b2594 |url=}}
10. ^Lawson, B. D., Rupert, A. H., & Kelley, A. M. (2013). Mental Disorders Comorbid with Vestibular Pathology. Psychiatric Annals, 43(7), 324.
11. ^{{cite journal |author=Tusa RJ |title=Dizziness |journal=Med. Clin. North Am. |volume=93 |issue=2 |pages=263–71, vii |date=March 2009 |pmid=19272508 |doi=10.1016/j.mcna.2008.09.005 |url=}}
12. ^{{cite journal |vauthors=Bronstein AM, Lempert T |title=Management of the patient with chronic dizziness |journal=Restor. Neurol. Neurosci. |volume=28 |issue=1 |pages=83–90 |year=2010 |pmid=20086285 |doi=10.3233/RNN-2010-0530 |url=}}
13. ^{{cite journal |vauthors=O'Connor RE, Brady W, Brooks SC, etal |title=Part 10: acute coronary syndromes: 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care |journal=Circulation |volume=122 |issue=18 Suppl 3 |pages=S787–817 |date=November 2010 |pmid=20956226 |doi=10.1161/CIRCULATIONAHA.110.971028 |url=http://circ.ahajournals.org/cgi/pmidlookup?view=long&pmid=20956226}}
14. ^{{cite journal |vauthors=Neuhauser HK, Lempert T |title=Vertigo: epidemiologic aspects |journal=Semin Neurol |volume=29 |issue=5 |pages=473–81 |date=November 2009 |pmid=19834858 |doi=10.1055/s-0029-1241043 |url=http://edoc.rki.de/oa/articles/redMw1x2qc1PA/PDF/28bPty5WOzjUE.pdf}}

External links

{{Medical resources
| DiseasesDB = 17771
| ICD10 = {{ICD10|R|42||r|40}}
| ICD9 = {{ICD9|780.4}}
| ICDO =
| OMIM =
| eMedicineSubj = neuro
| eMedicineTopic = 693
| MeshID = D004244
| MedlinePlus = 003093
}}
  • Dizzytimes.com Online Community for Sufferers of Vertigo and Dizziness
  • Dysautonomia Youth Network of America, Inc.
{{Cognition, perception, emotional state and behaviour symptoms and signs}}{{Authority control}}

1 : Neurological disorders

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