Vertigo as a Problem in the Emergency Department

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Introduction
Vertigo and/or dizziness are movement illusions in which people perceive themselves or their surroundings as moving. 1 The findings have demonstrated the role of emotion in patients with vertigo, which is important for the treatment and appropriate psychotherapy interventions for patients with vertigo. 2 Approximately 7.5 million people are contacted by emergency departments in the United States with complaints of vertigo and dizziness every year. 3Peripheral and central vertigo should be distinguished.Central nervous system involvement at the fourth ventricle, dorsal vermis, or nucleus of the vestibular nerve can lead to vertigo. 3 Vertigo is caused by diseases such as multiple sclerosis (MS), cerebral hemorrhage, brain stem infarction, cerebral tumors, and malformations of the posterior fossa.In addition, some studies suggested that an unruptured angioma can cause vertigo. 1 Cerebellar infarction and bleeding symptoms may appear minor at first, but they can quickly escalate into a life-threatening illness. 4Peripheral vertigo is generally intermittent; however, it might be accompanied by transient ischemic attack (TIA).The symptoms of peripheral vertigo are more severe than those of central vertigo.
Central vertigo is favored by hyperreflexia 1 , while nausea and vomiting are more intense in peripheral vertigo. 2 The best technique to rule out a central lesion is to rule in a peripheral lesion like Meniere's disease, vestibular neuritis, or benign positional vertigo, which all have their panel of symptoms. 5,6 ue to the thickness of the occiput, which generates artifacts and limited resolution, computerized tomography (CT) scans have low sensitivity in detecting posterior fossa lesions. 3his study aimed to assess patients with vertigo who were referred to the emergency department, and it can be viewed as a fundamental study to improve our knowledge about patients with vertigo.

Study Type
This was a prospective cross-sectional study.From all patients with chief complaints of vertigo/dizziness referred to the emergency department of Imam Reza Hospital of Tabriz University of Medical Sciences as a general hospital during one year, 280 patients were included in the sample population using Morgan's approach. 7,8 atients who left the emergency department despite the physicians' advice and patients with any sign of bleeding, known chronic vertigo, and cardiac dysrhythmia were excluded.

Data Gathering
Variables in this study were pre-specified and included

Original Article
age, sex, magnetic resonance imaging (MRI) findings, CT scan findings, type of vertigo, patient's history of hypertension (HTN)/diabetes/hyperlipidemia (HLP), and other diseases.In T1, T2, and diffusion-weighted study data, the diagnoses of vertigo were retrieved from the patient's history, physical examination, and MRI.

Data Analysis
All the data were analyzed by SPSS® 15.0.0Software (Microsoft LTD, Chicago).The mean, median of the data, standard deviation, and frequency were calculated descriptively.

Results
Patients with vertigo who visited the emergency department were enrolled in this study (N = 280).The incidence of patients complaining of vertigo was found to be 2.1% (from 13 350 medical patients) of all patients who came to the emergency department, and 30.3% of those complaining of vertigo were diagnosed with central vertigo.
Based on MRI findings or arterial angiography, 77 patients were diagnosed with vertebrobasilar insufficiency (VBI), 4 patients with ischemic stroke, 2 patients with intracerebral hemorrhage (ICH), 1 patient with a cerebellar tumor, and 1 patient with hemangioma.
The age of the patients ranged from 11 to 89 years old, and the interquartile range of the age of patients was 45 to 60 years old with a median of 58.Of all patients with a complaint of vertigo, 58.6% were female, and 41.4% were male, while 58.8% of patients with central vertigo were men, and 41.2% were women.
For 175 (62.5%) of the 280 patients who complained of vertigo, a CT scan was requested.
MRI was also performed for all patients who did not respond to treatments and were suspected to have a central lesion.That is, after a CT scan, an MRI was also done for 175 people.For 76% of individuals over the age of 65 (59 out of 77 patients), a CT scan was suggested.CT scan findings revealed one of the four cerebral ischemia lesions and all cases of ICH, cerebellar tumor, and hemangioma, whereas an MRI revealed three ischemic lesions (Table 1).

Discussion
In this study, females accounted for 58.6% of all vertigo patients, while males accounted for 58.8% of patients with central vertigo.According to certain research, women have a higher percentage of vertigo complaints than males, whereas men have a higher frequency of central vertigo.In research by Campbell et al, 40% of male patients and 60% of female patients had vertigo. 9In a study by Kerber et al, men made up 36% of patients with vertigo, while women constituted the rest.In addition, males made up 55% of patients diagnosed with stroke or TIA. 6,10 ccording to the findings of this and previous studies, women account for a greater proportion of patients with vertigo, whereas men have a higher risk of vascular events. 11n this study, 30% of patients with complaints of vertigo (85 patients out of 280 patients) had central vertigo, which constituted 77 patients with VBI, 4 patients with ischemic stroke, 2 cases of ICH, 1 case of hemangioma tumor of the cerebellum, and 1 case of hemangioma tumor of the cerebellum, respectively.In addition, the patient's average age was 53.2 ± 17.5.Patients with central vertigo and ischemic stroke/ICH had an average age of 65.9 ± 10.9 and 69.8 ± 14.09 years, respectively.In a study by Kerber et al on patients over 46 years old with vertigo and dizziness, the diagnosis of stroke/TIA was verified in 53 cases (3.2% of patients with vertigo), confirming that ischemic stroke was the most common cause of diagnosis of stroke/TIA with a 33% frequency. 3The findings of this and other research demonstrated that the risk of a cerebrovascular stroke rises with age.
True vertigo was reported by 2.1% of patients admitted to the hospital's emergency department in this study.According to a study by Kerber et al, patients with vertigo made up 2.5% of all patients admitted to the emergency department from 1995 to 2004. 6Moreover, CT scans were requested by 62.5% of patients with vertigo and 83% of patients over 65 years old in this study.The symptoms of 5 patients out of 85 patients with central vertigo were confirmed by a CT scan.In addition, the major risk factor for atherosclerosis and stroke is high blood pressure (HLP).A systolic blood pressure of more than 160 or a diastolic blood pressure of more than 95 raises the risk of a stroke.Stroke is also linked to DM and high blood pressure. 12ccording to this study, HTN was the most common risk factor in patients with central vertigo, accounting for

Limitations
This study was conducted as a fundamental study, and due to the lack of personnel and time, it was better to enroll all patients not a sample of them to improve the power of the study.Moreover, if this study was done in a multi-center situation, the findings could be generalized to a wider population.

Conclusions
The majority of patients with vertigo in this study were females although central vertigo was more common in male patients.Patients who were referred to the emergency department with vertigo often did not respond to the usual treatments, and this was the main reason that they visited the emergency department, so a detailed history and complete examination along with a suitable imaging modality can help assess these patients.

Table 1 .
CT Scans Findings

Table 2 .
Risk Factors of Patients