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  • Title: [Effect of hyperlipidemia and hypothyroidism on auditory evoked brain stem responses].
    Author: Höhmann D, Kahaly G, Warzelhan J.
    Journal: HNO; 1990 Dec; 38(12):446-50. PubMed ID: 2086569.
    Abstract:
    Temporary changes in audiometry have been reported in hypercholesterolaemia and in hypo- and hyperthyroidism. The purpose of the present prospective and controlled study was to record changes in conduction time of auditory brain-stem response (ABR) in patients with hyperlipidaemia and hypothyroidism before and after therapy over a period of 6 months. The acoustic evoked brain-stem response Jewett waves I-V were delayed in patients with hypercholesterolaemia, hypertrigliceridaemia and hypothyroidism in comparison with an age-matched control group. The changes in pure-tone threshold and brain-stem responses correlated with the degree of hyperlipidaemia or hypothyroidism. After treatment the brain-stem responses of hypothyroid patients tended to return to normal, and in a few cases normal pure-tone thresholds were achieved. Of the patients with hypercholesterolaemia and hypertrigliceridaemia, 28% had improvements in pure-tone thresholds, whereas no significant changes were found in the ABR following therapy.
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