What is Vertigo?
Definition of Vertigo
Vertigo is characterized by a sensation of movement, often described as spinning, even in the absence of actual movement. It can also manifest as a distorted sense of movement during typical head movements. Treatment for vertigo varies based on several factors.
Distinction Between Vertigo, Dizziness, and Motion Sickness
Vertigo and dizziness are both associated with conditions affecting the vestibular system, which plays a crucial role in maintaining balance and spatial orientation. While vertigo is typically categorized as a type of dizziness, recent findings indicate that this classification may not be entirely accurate. Dizziness refers to various sensations that do not necessarily involve a false perception of movement. Despite this distinction, clinical evidence suggests that differentiating between vertigo and dizziness may not significantly aid in diagnosing or treating patients’ conditions.
Motion sickness, on the other hand, is triggered by actual motion—such as traveling in an airplane or using virtual reality devices—to which an individual has not acclimated. Similar to vertigo, it arises from the vestibular system’s stimulation and can cause symptoms like nausea and vomiting. However, motion sickness usually occurs in individuals with a functional vestibular system, whereas those with preexisting vestibular disorders typically do not experience motion sickness.
What Causes Vertigo?
Vertigo can be classified into two main types: peripheral and central, based on the underlying cause.
Peripheral Vertigo
Peripheral vertigo is associated with disorders affecting the inner ear and vestibular nerve, accounting for over seventy-five percent of vertigo cases. This type is generally benign, in contrast to central vertigo, which is more serious and requires urgent medical attention. Common disorders linked to peripheral vertigo include benign paroxysmal positional vertigo (BPPV), vestibular neuritis, and Ménière’s disease. Notably, BPPV, vestibular neuritis, and Ménière’s disease represent over ninety percent of peripheral vertigo cases.
BPPV occurs when calcium crystal deposits, known as canaliths, dislodge within the ear canal, leading to brief episodes of vertigo triggered by sudden head movements. These episodes are sudden and typically last up to one minute.
Vestibular neuritis is caused by an ear infection that results in inflammation of the vestibular nerve, often following an upper respiratory viral infection. Patients may experience sudden, spontaneous vertigo episodes that can last from seconds to several days.
Ménière’s disease is a disorder of the inner ear characterized by increased endolymphatic pressure, leading to spontaneous vertigo, potential hearing loss, and tinnitus.
Central Vertigo
Central vertigo arises from disorders affecting the brain and spinal cord, including vestibular migraines, cerebrovascular disease, and acoustic neuroma. Vestibular migraines occur in individuals with a migraine history and typically present with spontaneous vertigo episodes.
Cerebrovascular diseases can cause vertigo due to blockages or insufficient blood flow to the brain and inner ear, with approximately half of patients reporting vertigo as a symptom. In some cases, vertigo may serve as a warning sign of a stroke.
Acoustic neuroma, also known as vestibular schwannoma, is a benign tumor on the vestibular nerve that can result in severe, prolonged vertigo episodes, impacting the patient’s quality of life.
Other Causes of Vertigo
Vertigo can also be triggered by trauma, psychiatric conditions, and cardiovascular issues such as low blood pressure. It is a common symptom following head or neck injuries, blast injuries, or changes in ear pressure, with symptoms lasting from minutes to weeks, and in some cases, persisting long-term.
How is Vertigo Diagnosed?
Diagnosis of vertigo begins with a comprehensive medical history and physical examination conducted by a physician. The assessment includes examining the timing and triggers of symptoms to identify the underlying cause.
Symptoms evaluated may include hearing loss, nystagmus (abnormal eye movements), balance issues, gait instability, nausea, and vomiting. Physical examinations encompass both cardiac and neurological assessments, including orthostatic blood pressure measurements in standing and supine positions.
Eye movements are analyzed to distinguish between central and peripheral causes of vertigo. The Dix-Hallpike maneuver is specifically used to diagnose BPPV, with a positive test indicated by vertigo triggered during specific head movements.
What is the Treatment for Vertigo?
Several treatment options are available for managing vertigo, tailored to the patient’s specific medical condition.
Treatment for Benign Paroxysmal Positional Vertigo
BPPV is commonly treated using the Epley maneuver, which can be performed at home or in a clinical setting. This procedure involves repositioning dislodged canaliths back to their original locations in the ear canal.
The half somersault maneuver is another at-home option for BPPV, with some studies indicating that patients prefer it due to reduced dizziness. However, the Epley maneuver remains the more effective treatment when performed by a healthcare professional.
Brandt-Daroff exercises are also effective for treating BPPV and can be conducted at home. Research has shown these exercises to be as effective as the Epley maneuver.
Patients are advised to consult their healthcare provider when selecting a treatment strategy for vertigo.
Treatment for Vestibular Neuritis
Vestibular neuritis is typically addressed with medications and vestibular rehabilitation exercises. Common medications include antiemetics, benzodiazepines, and antihistamines, which help alleviate associated symptoms.
Treatment for Ménière’s Disease
Initial management of Ménière’s disease symptoms involves dietary modifications, including reduced salt and alcohol intake and decreased caffeine consumption. If these changes do not suffice, medications such as thiazide diuretics or glucocorticoids may be prescribed.
Treatment of Central Vertigo Disorders
Vestibular migraines are generally managed by identifying and mitigating triggering factors, with recommendations for stress relief, adequate sleep, and regular exercise.
Patients with cerebrovascular diseases may receive antiplatelet therapy and strategies to lower stroke risk factors.
Individuals experiencing symptoms associated with vertigo should seek medical advice for appropriate evaluation and management.