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Research in Vestibular Science > Accepted Articles
Prognosis of Sudden Low Frequency Hearing Loss During Long-Term Follow-Up
Ji Hyung Kim, Sang Hyun Kwak, Seong Hoon Bae, Sung Hunh Kim, Gi-Sung Nam
Yonsei University College of Medicine, Seoul, Korea
Correspondence  Gi-Sung Nam ,Tel: +82-2-2228-3624, Fax: +82-2-393-0580, Email: entnamgi@gmail.com
Received: July 19, 2018;  Accepted: August 6, 2018.  Published online: August 6, 2018.
ABSTRACT
Objectives:   The prognosis of Sudden low frequency hearing loss (SLFHL) is relatively good, but recurrences of hearing loss and possible progression to Meniere’s disease is still a clinically important concern. This study was conducted to confirm the rate at which SLFHL proceeds to Meniere’s disease.
Materials and Methods:   We retrospectively analyzed the medical records of 160 SLFHL patients who were followed up for more than 6 months from September 2005 to August 2013. Progression, initial hearing level, recovery and recurrence of hearing loss were reviewed.
Results:   106 patients (66.25%) had complete hearing recovery, 32 (20%) had recurrent hearing loss. Of the 32 recurrent group, 15 (9.38%) had progressed to Meniere’s disease after average of 1.7±1.4 years. The mean age of non-recurrent group was higher than recurrent group (55.3±14.6 and 48.0±13.4, respectively, p=0.011). The threshold of 250Hz was significantly higher in the Non-recurrent group compared with recurrent group (p=0.047).
Conclusion:   In patients with SLFHL, recurrence at relatively young age should be considered with the possibility of progression to Meniere’s disease.
Keywords: Sudden hearing loss; Sensorineural hearing loss; Prognosis; Meniere’s disease
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