Dizziness overview

Dizziness is a symptom rather than a condition on its own. It is a complex and subjective complaint that encompasses a wide spectrum of symptomatology. It is a sensation of postural unsteadiness or deceptive motion. It is one of the most communal presenting complaints that accounts for 5% of primary care practice for individuals aged 65 or older. Dizziness is a nonspecific term mainly used by many people and is classified into different categories: vertigo, spinning, disequilibrium, giddiness, presyncope, faintness, lightheadedness, or feeling woozy. It is one of the most common presenting symptom among patients seen by emergency medical physicians, primary care physicians, neurologists, and otolaryngologists.

Dizziness may be classified based on the symptoms of the patient into 4 main subtypes including vertigo, presyncope, [[BPPV], and disequilibrium.

It is understood that pathophysiology of dizziness depends on the etiological subtype including orthostatic hypotension, benign paroxysmal positional vertigo, Menier’s disease, Parkinson’s disease, hyperventilation syndrome, peripheral neuropathy, and vestibular migraine.

Dizziness may be caused by hypotension, dehydration, arrhythmia, labyrinthitis, Meniere’s disease, stroke, or hypoglycemia. Other causes are based on the organ system such as cardiovascular, neurological, musculoskeletal, dermatological, endocrine, infectious, pulmonological or side effects of the medicine.

Dizziness must be differentiated from other diseases that cause vertigo, nystagmus, and hearing problems, such as vestibular neuritis, HSV oticus, Meniere disease, labyrinrhine concussion, perilymphatic fistula, semicircular canal dehiscence syndrome, vestibular paroxysmia, Cogan syndrome, vestibular schwannoma, otitis media, aminoglycoside toxicity, recurrent vestibulopathy, vestibular migraine, epileptic vertigo, multiple sclerosis, brain tumors, cerebellar infarction/hemorrhage, brain stem ischemia, [[Arnold-Chiari malformation|chiari malformation], presyncope and disequilibrium.

Dizziness is one of the most common complaints in ambulatory care, accounting for nearly 8 million outpatient visits annually in the United States. The incidence of dizziness is approximately 50–100 million worldwide, and around 4.3 million patients in the United States. The lifetime prevalence of dizziness is expected to be 30%. Idiopathic dizziness commonly affects individuals 25 years and older in an emergency department.

Common risk factors in the development of dizziness include family history of thromboembolic factors (diabetes, hypertension, high cholesterol, and rheumatic disease), cardiac arrhythmias, stroke, medication side effect (diuretics, antiepileptic drugs, opioid-based analgesics, antipsychotic drugs, antidepressants, antihypertensive, antifungal, lithium, benzodiazepines, antiarrhythmic, antimalarial and anti-HIV-drugs). Multiple sclerosis, seizures, brain tumors, benign positional vertigo, and labyrinthitis.

If left untreated, patients may experience spontaneous recovery. Common complications of dizziness include nausea, vomiting, fainting, fall, imbalance and hearing loss, and neurological complications following Dix Hallpike or Epley maneuvers. Prognosis is generally good, and the 10-year mortality rate of patients with dizziness is low approximately (hazard ratio [HR] = 0.62; 95% CI, 0.40-0.96)

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