PMC2265298_01
together with continuous line and ( indicate hearing level of air conduction, and bone conduction in right ear respectively.. x together with dotted line and  ) indicate hearing level of air conduction, and bone conduction in left ear respectively.
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F1
Audiogram revealed a severe sensorineural hearing loss at 35.0 dB, with a predominance of low frequency impairment in the right ear (Figure 1).
together with continuous line and ( indicate hearing level of air conduction, and bone conduction in right ear respectively.. x together with dotted line and  ) indicate hearing level of air conduction, and bone conduction in left ear respectively.
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F2
Since April 2004, however, a few times per month the patient has experienced vertigo spells that were intractable to conventional medical therapy (Figure 2).
Audiogram on October 2006.
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F3
An audiogram performed in October 2006 revealed that the patient's right-side hearing level deteriorated to 62.5 dB (Figure 3).