Table 3.
Vestibular laboratory testing 1 to 5 months after onset of acute peripheral vestibulopathy (AUPVP).
| Patient nr. | Side affected | vHIT gain | oVEMP AR | cVEMP AR | DVA | SVV | VOG (SPV) | CP | Interpretation (summary) | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HC | AC | PC | ACS | BCV | ||||||||
| #1 (1 month) | R | 1.0 | 0.9 | 0.7 | −0.01 | 0.01 | n.d. | 0.1 | −0.2° | VIN R (3°/sec) (recovery nystagmus) | n.d. | Recovery of R vestibular function |
| #2 (5 months) | R |
0.7 (CS, OS) |
0.8 | 1.1 | 0.42 | 0.26 | n.d. | 0.8 | 2.3° | VIN L (3°/s) | 19% | Hypofunction R HC and utricle |
| #3 (1 month) | R | 1.1 | 1.0 | 1.3 | −0.07 | 0.07 | n.d. | 0.2 | −0.1° | no significant nystagmus | −14% | Recovery of R vestibular function |
| #4 (1 month) | R |
0.3 (CS, OS) |
0.8 | 1.0 | n.d. | n.d. | n.d. | 1.2 | 3.1° | n.d. | n.d. | Hypofunction R HC and utricle (saccule not tested) |
| #5 (1 month) | L | 0.6 (OS) | 1.3 | 1.0 | n.d. | n.d. | n.d. | 0.3 | n.d. | n.d. | n.d. | Hypofunction L HC (utricle and saccule not tested) |
| #6 (4 months) | L |
0.6 (CS, OS) |
1.1 |
0.6 (CS,OS) |
−0.14 | –1 | –1 | 0.4 | 0.9° | HSN R (6°/s), VIN R (6°/s) | –80% | Hypofunction L HC, PC and saccule |
| #7 (1 month) | R | 1.0 (CS, OS) |
0.8 (CS) |
0.9 | 0.0 | 0.28 | n.d. | 0.5 | 7.5° | SN L (3°/s), HSN L (6°/s) | 79% | Hypofunction R HC, (AC) and utricle |
| #7 (3 months) | R | 1.2 | 1.2 | 1.1 | −0.16 | 0.05 | n.d. | 0.4 | 1.2° | No nystagmus | 45% | Recovery of R vestibular function apart from CP |
| #8 (1 month) | L | 1.0 (CS) | 0.8 | 0.8 | −0.26 | −0.37 | 0.03 | 0.4 | –2.5° | No significant nystagmus | –52% | Hypofunction L HC and utricle |
vHIT gains and DVA values are presented for the affected side only (within normal range on the unaffected side for all patients). Pathological values are printed in bold (see “PATIENTS AND METHODS” section for definition of normal values and further details). For o- and cVEMP ARs, SVV and CP, positive values show relative hypofunction on the right side, while negative values indicate relative left-sided hypofunction.
vHIT, video head impulse test; HC, horizontal canal, AC, anterior canal; PC, posterior canal; o-/c-VEMP, ocular / cervical vestibular evoked myogenic potentials; AR, asymmetry ratio; ACS, air-conducted sound; BCV, bone-conducted vibration; DVA, dynamic visual acuity; SVV, subjective visual vertical; VOG, video-oculography; SPV, slow-phase velocity; CP, caloric paresis; R, right; L, left; n.d., not determined; VIN, vibration-induced nystagmus; CS, covert saccades in vHIT; OS, overt saccades; HSN, head shake nystagmus; SN, spontaneous nystagmus.