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Characteristics of hearing loss in patients with herpes zoster oticus

View Article: PubMed Central - PubMed

ABSTRACT

Patients with herpes zoster oticus (HZO) may commonly show symptoms associated with 7th and 8th cranial nerve (CN VII and CN VIII) dysfunction. The aim of this study is to investigate the characteristics of hearing loss in patients with HZO and discuss possible mechanisms.

Ninety-five HZO patients who showed at least one of the symptoms of CN VII and CN VIII dysfunction between January 2007 and October 2014 were included in this study. Hearing loss was defined when the mean thresholds of pure tone audiometry (PTA) in speech frequency (0.5 kHz + 1 kHz + 2 kHz/3) or isolated high frequency (4 kHz + 8 kHz/2) were greater than 10 dB in the affected ear compared with the healthy ear, and a total of 72 patients were classified as the hearing loss group.

The difference of mean PTA thresholds between affected and healthy ears was significantly greater in the high frequency range than in low range (20.0 ± 11.5 dB vs. 12.9 ± 15.7 dB, P = 0.0026) in patients with hearing loss (n = 72). The difference between affected and healthy ear was significantly greater in patients with vertigo (n = 34) than those without vertigo (n = 38) in both the high (P = 0.033) and low (P = 0.024) frequency ranges. In contrast, the differences between affected and healthy ears were not significantly different between patients with facial palsy (n = 50) and those without facial palsy (n = 22) in both the high (P = 0.921) and low (P = 0.382) frequency ranges.

In patients with HZO, hearing loss is more severe in the high frequency range than in the low frequency range. Hearing impairment is more severe in patients with vertigo than in those without vertigo in both the high and low frequency ranges, even though the degree of hearing impairment is not significantly different between patients with and without facial palsy. These findings indicate that the mechanisms of viral spread from CN VII to CN VIII may differ between vestibular and audiologic deficits.

No MeSH data available.


Related in: MedlinePlus

Comparison of pure tone averages between patients with facial palsy (n = 50) and those without facial palsy (n = 22) in patients with hearing loss (n = 72). Pure tone averages (means ± standard deviations, dB) were presented in the panels. The difference in pure tone average between affected and healthy ears is significantly greater in the high frequency range (3000, 4000, and 8000 Hz) than in the low frequency range (250, 500, and 1000 Hz) in both patient groups with facial palsy (20.1 ± 11.7 dB vs. 14.0 ± 16.7 dB; P = 0.038) and without facial palsy (19.8 ± 11.2 dB vs. 10.5 ± 13.1 dB; P = 0.015). However, the difference in the pure tone average between affected and healthy ears is not significantly different between patients with facial palsy and those without facial palsy in both high (20.1 ± 11.7 dB vs. 19.8 ± 11.2 dB; P = 0.921) and low (14.0 ± 16.7 dB vs. 10.5 ± 13.1 dB; P = 0.382) frequency ranges.
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Figure 4: Comparison of pure tone averages between patients with facial palsy (n = 50) and those without facial palsy (n = 22) in patients with hearing loss (n = 72). Pure tone averages (means ± standard deviations, dB) were presented in the panels. The difference in pure tone average between affected and healthy ears is significantly greater in the high frequency range (3000, 4000, and 8000 Hz) than in the low frequency range (250, 500, and 1000 Hz) in both patient groups with facial palsy (20.1 ± 11.7 dB vs. 14.0 ± 16.7 dB; P = 0.038) and without facial palsy (19.8 ± 11.2 dB vs. 10.5 ± 13.1 dB; P = 0.015). However, the difference in the pure tone average between affected and healthy ears is not significantly different between patients with facial palsy and those without facial palsy in both high (20.1 ± 11.7 dB vs. 19.8 ± 11.2 dB; P = 0.921) and low (14.0 ± 16.7 dB vs. 10.5 ± 13.1 dB; P = 0.382) frequency ranges.

Mentions: We then compared pure tone averages between patients with and without facial palsy (Fig. 4). In patients with facial palsy (n = 50), affected ears showed a mean pure tone average of 53.2 ± 27.1 dB, and healthy ears exhibited a mean pure tone average of 33.2 ± 23.8 dB in the high frequency range. In the low frequency range, a mean pure tone average was 34.8 ± 24.3 dB in affected ears and 20.9 ± 14.3 dB in healthy ears. The difference between affected and healthy ears was significantly greater in high frequency range (20.1 ± 11.7 dB) than in low frequency range (14.0 ± 16.7 dB, P = 0.038; Fig. 4). In patients without facial palsy (n = 22), affected ears exhibited a mean pure tone average of 41.9 ± 17.5 dB, and healthy ears showed a mean pure tone average of 22.3 ± 13.6 dB in the high frequency range. In low frequency, the mean pure tone average was 30.2 ± 19.3 dB in affected ears and 20.0 ± 10.1 dB in healthy ears. The difference between affected and healthy ears was also significantly greater in high frequency range (19.8 ± 11.2 dB) than in the low frequency range (10.5 ± 13.1 dB, P = 0.015; Fig. 4). However, differences between affected and healthy ears were not statistically significant between patients with facial palsy and those without facial palsy in both high (P = 0.921) and low frequency (P = 0.382) ranges (Fig. 4).


Characteristics of hearing loss in patients with herpes zoster oticus
Comparison of pure tone averages between patients with facial palsy (n = 50) and those without facial palsy (n = 22) in patients with hearing loss (n = 72). Pure tone averages (means ± standard deviations, dB) were presented in the panels. The difference in pure tone average between affected and healthy ears is significantly greater in the high frequency range (3000, 4000, and 8000 Hz) than in the low frequency range (250, 500, and 1000 Hz) in both patient groups with facial palsy (20.1 ± 11.7 dB vs. 14.0 ± 16.7 dB; P = 0.038) and without facial palsy (19.8 ± 11.2 dB vs. 10.5 ± 13.1 dB; P = 0.015). However, the difference in the pure tone average between affected and healthy ears is not significantly different between patients with facial palsy and those without facial palsy in both high (20.1 ± 11.7 dB vs. 19.8 ± 11.2 dB; P = 0.921) and low (14.0 ± 16.7 dB vs. 10.5 ± 13.1 dB; P = 0.382) frequency ranges.
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Figure 4: Comparison of pure tone averages between patients with facial palsy (n = 50) and those without facial palsy (n = 22) in patients with hearing loss (n = 72). Pure tone averages (means ± standard deviations, dB) were presented in the panels. The difference in pure tone average between affected and healthy ears is significantly greater in the high frequency range (3000, 4000, and 8000 Hz) than in the low frequency range (250, 500, and 1000 Hz) in both patient groups with facial palsy (20.1 ± 11.7 dB vs. 14.0 ± 16.7 dB; P = 0.038) and without facial palsy (19.8 ± 11.2 dB vs. 10.5 ± 13.1 dB; P = 0.015). However, the difference in the pure tone average between affected and healthy ears is not significantly different between patients with facial palsy and those without facial palsy in both high (20.1 ± 11.7 dB vs. 19.8 ± 11.2 dB; P = 0.921) and low (14.0 ± 16.7 dB vs. 10.5 ± 13.1 dB; P = 0.382) frequency ranges.
Mentions: We then compared pure tone averages between patients with and without facial palsy (Fig. 4). In patients with facial palsy (n = 50), affected ears showed a mean pure tone average of 53.2 ± 27.1 dB, and healthy ears exhibited a mean pure tone average of 33.2 ± 23.8 dB in the high frequency range. In the low frequency range, a mean pure tone average was 34.8 ± 24.3 dB in affected ears and 20.9 ± 14.3 dB in healthy ears. The difference between affected and healthy ears was significantly greater in high frequency range (20.1 ± 11.7 dB) than in low frequency range (14.0 ± 16.7 dB, P = 0.038; Fig. 4). In patients without facial palsy (n = 22), affected ears exhibited a mean pure tone average of 41.9 ± 17.5 dB, and healthy ears showed a mean pure tone average of 22.3 ± 13.6 dB in the high frequency range. In low frequency, the mean pure tone average was 30.2 ± 19.3 dB in affected ears and 20.0 ± 10.1 dB in healthy ears. The difference between affected and healthy ears was also significantly greater in high frequency range (19.8 ± 11.2 dB) than in the low frequency range (10.5 ± 13.1 dB, P = 0.015; Fig. 4). However, differences between affected and healthy ears were not statistically significant between patients with facial palsy and those without facial palsy in both high (P = 0.921) and low frequency (P = 0.382) ranges (Fig. 4).

View Article: PubMed Central - PubMed

ABSTRACT

Patients with herpes zoster oticus (HZO) may commonly show symptoms associated with 7th and 8th cranial nerve (CN VII and CN VIII) dysfunction. The aim of this study is to investigate the characteristics of hearing loss in patients with HZO and discuss possible mechanisms.

Ninety-five HZO patients who showed at least one of the symptoms of CN VII and CN VIII dysfunction between January 2007 and October 2014 were included in this study. Hearing loss was defined when the mean thresholds of pure tone audiometry (PTA) in speech frequency (0.5 kHz + 1 kHz + 2 kHz/3) or isolated high frequency (4 kHz + 8 kHz/2) were greater than 10 dB in the affected ear compared with the healthy ear, and a total of 72 patients were classified as the hearing loss group.

The difference of mean PTA thresholds between affected and healthy ears was significantly greater in the high frequency range than in low range (20.0 ± 11.5 dB vs. 12.9 ± 15.7 dB, P = 0.0026) in patients with hearing loss (n = 72). The difference between affected and healthy ear was significantly greater in patients with vertigo (n = 34) than those without vertigo (n = 38) in both the high (P = 0.033) and low (P = 0.024) frequency ranges. In contrast, the differences between affected and healthy ears were not significantly different between patients with facial palsy (n = 50) and those without facial palsy (n = 22) in both the high (P = 0.921) and low (P = 0.382) frequency ranges.

In patients with HZO, hearing loss is more severe in the high frequency range than in the low frequency range. Hearing impairment is more severe in patients with vertigo than in those without vertigo in both the high and low frequency ranges, even though the degree of hearing impairment is not significantly different between patients with and without facial palsy. These findings indicate that the mechanisms of viral spread from CN VII to CN VIII may differ between vestibular and audiologic deficits.

No MeSH data available.


Related in: MedlinePlus