Table 1.
Objective findings related to diagnostics. ∗Follow-up examination six years after the first examination. Please note that, during the symptomatic period, the patient was diagnosed with BPPV at 5 out of 8 (63%) follow-up visits. Please also note that diagnostic conclusions in this table are based exclusively on the Bárány- and AAO-HNS diagnostic criteria. Other possible types of BPPV are mentioned in the discussion section. Discrete spontaneous nystagmus is equivalent to an average slow phase velocity (a-SPV) of less than 2 degrees per second.
| Visit | Positive objective findings | Diagnostics in relation to BPPV |
|---|---|---|
| 1 | SRT: persisting bilateral apogeotropic nystagmus (>1 minute), highest slow phase velocity on the right side | CUP of the left lateral SCC |
| 2 | SRT: persisting bilateral apogeotropic nystagmus (>1 minute), highest slow phase velocity on the right side Discrete right-beating horizontal spontaneous nystagmus |
CUP of the left lateral SCC |
| 3 | Right DH: persisting upbeat and rotational nystagmus (>1 minute) SRT: persisting bilateral apogeotropic nystagmus (>1 minute), highest slow phase velocity on the right side |
CUP of the right posterior SCC and CUP in the left lateral SCC |
| 4 | Right DH: persisting upbeat and rotational nystagmus (>1 minute) SRT: persisting bilateral apogeotropic nystagmus (>1 minute), highest slow phase velocity on the right side |
CUP of the right posterior SCC and CUP of the left lateral SCC |
| 5 | Normal otoneurological examination | Patient symptomatic, but no objective findings compatible with BPPV |
| 6 | Discrete downbeating vertical spontaneous nystagmus | Patient symptomatic, but no objective findings compatible with BPPV |
| 7 | Normal otoneurological examination | Patient symptomatic, but no objective findings compatible with BPPV |
| 8 | SRT: persisting bilateral apogeotropic nystagmus (>1 minute), highest slow phase velocity on the right side | CUP of the left lateral SCC |
| 9 | Normal otoneurological examination | No objective findings or symptoms compatible with BPPV |
| 10 | Normal otoneurological examination | No objective findings or symptoms compatible with BPPV |
| 11∗ | Normal otoneurological examination | No objective findings or symptoms compatible with BPPV |