Side of HL Initial Symptoms Risk Factors
Infraction of the AICA territory      
Biavati et al. [6] Ipsilateral Recurrent vertigo  
Deplanque et al. [7] Bilateral HL and vertigo  
Kim et al. [8] Ipsilateral Recurrent vertigo  
Lee et al. [9] Bilateral HL and vertigo DM
Lee et al. [10] Ipsilateral HL and vertigo  
  Ipsilateral HL and vertigo  
Lee et al. [11] Ipsilateral Recurrent tinnitus and HL  
  Ipsilateral Recurrent vertigo  
  Bilateral Recurrent ipsilateral tinnitus  
  Ipsilateral Recurrent vertigo  
  Ipsilateral Recurrent tinnitus and HL  
Lee et al. [12] Bilateral Recurrent HL and vertigo DM, HT
Lee et al. [13] Ipsilateral HL and vertigo HT
Yi et al. [14] Ipsilateral HL and vertigo HT
Murakami et al. [15] Ipsilateral HL, tinnitus and vertigo HT
Son et al. [16] Ipsilateral HL and dizziness DM, HT
Kim et al. [17] Ipsilateral HL and vertigo Af, old MI
  Ipsilateral HL and vertigo HT
  Ipsilateral HL and vertigo  
  Ipsilateral HL and vertigo VA dissection
Lee et al. [18] Ipsilateral HL, tinnitus and vertigo HT, DM, Hypercholesterolemia
Ikegami-Takada et al. [19] Ipsilateral HL and vertigo  
Ohki et al. [presented in this case] Ipsilateral Recurrent vertigo  
Infarction of the PICA territory      
Kanzakin et al. [20] Ipsilateral HL and tinnitus  
Infarction of the AICA+PICA territory      
Kido et al. [21] Ipsilateral Recurrent vertigo  
Chiang et al. [22] Bilateral HL and vertigo  
Infarction of the SCA territory      
Murakami et al. [23] Contralateral HL Hyperglycaemia, HT
BA occlusion      
Huang et al. [4] Bilateral HL, tinnitus and vertigo  
  Bilateral HL, tinnitus and dizziness  
  Bilateral HL, tinnitus and vertigo  
Sunose  H et al. [24] Bilateral HL dizziness HT
Toyoda K et al. [25] Bilateral HL and vertigo HT, DM, Hypercholesterolemia
  Bilateral HL and vertigo  
Sauvaget E et al. [5] Bilateral Vertigo Smoking
  Bilateral Vertigo  
Jung J et al. [26] Bilateral HL, tinnitus and recurrent vertigo HT
Huang CC et al. [27] Bilateral Recurrent vertigo  
Bovo R et al. [28] Bilateral HL and vertigo HT, cerebrovascular disorders
Ohki M et al. [29] Ipsilateral HL, tinnitus and vertigo  
HL: Hearing Loss, DM: diabetes mellitus, HT: hypertension, MI: myocardial infarction, Af: atrial fibrillation
Table 1: Sensorineural hearing loss without cranial nerve deficits in vertebrobasilar artery ischemia.