This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/pace.13365. This article is protected by copyright. All rights reserved. CHANGES IN THE PARAMETERS OF VENTRICULAR REPOLARIZATION DURING PRE-APNEA, APNEA AND POST-APNEA PERIODS IN PATIENTS WITH OBSTRUCTIVE SLEEP APNEA Running Title: Ventricular repolarization during OSA Word Count: 2030 Erdoğan Sökmen,M.D. 1 , Sinan Cemgil Özbek,M.D. 1 , Mustafa Çelik,M.D 1 , Serkan Sivri,M.D. 1 , Mehmet Metin,M.D. 2 , Mustafa Avcu,M.D. 2 1- Department of Cardiology, Ahi Evran University Training and Research Hospital, Kirsehir, Turkey 2- Department Otorhinolaryngology, Ahi Evran University Training and Research Hospital, Kirsehir, Turkey Corresponding Author: Erdoğan Sökmen Ahi Evran Universitesi, 2019. Sokak, No:1 Merkez-Kırşehir, Turkey Post code: 40100 e-mail: erdoganmen@gmail.com Phone: +903862134515 Cellular Phone: +905515539914 Author Contributions: E.S. and S.C.Ö, concept, study design and drafting the article. M.Ç., data analysis. S.S. data collection and drafting the article. M.M and M.A data collection and data analysis. Funding and Acknowledgement: There is no funding for this study, and the authors declare that there is no conflict of interests.