caa a22 4500 445297476 CHVBK 20180317142546.0 cr unu---uuuuu 170323e20100101xx s 000 0 eng 10.1007/s12070-010-0008-6 doi (NATIONALLICENCE)springer-10.1007/s12070-010-0008-6 A study of electrocardiographic changes in congenital deaf school children [Elektronische Daten] [Surekharani Chinagudi, Shiddanna Patted, Anita Herur] Background: There is evidence of cardiac abnormalities in congenital deaf school children, together called as Jervel Lange Nielsen syndrome or Long QT syndrome. Aim: The main aim was to study the electrocardiographic changes in congenital deaf children. Materials and Methods: Fifty congenital deaf children aged 6-18 years were selected. ECG was taken in lead II, at rest and after exercise, as some are known to exhibit the abnormality after exercise. The child was made to run on the Tread mill till exhaustion. Corrected QT interval (QTc) was Calculated by Bazett's formula QTc = QT/ √R-R. ECG was also analyzed for other abnormalities like Twave changes, ST depression, rhythm abnormalities etc. Results: Out of 50, 2 children showed resting QTc of 0.45 sec which is diagnostically high. Mean value of QTc in deaf children(Cases) before exercise was 0.4111 ± 0.0271 sec and in controls 0.379 ± 0.020 sec. Mean value of QTc after exercise in deaf(cases) was 0.403 ± 0.028 sec and in controls 0.376 ± 0.021 sec. Eight deaf children showed ST depression and 2 biphasic T and 2 notched T waves. Thirty-three deaf children's parents had consanguineous marriage. Conclusion: The results were explained on the basis of ion channellopathy in heart and inner ear which predisposes to sensorineural hearing loss and cardiac abnormality. Association of Otolaryngologists of India, 2010 Jervel-Lange Nielsen syndrome nationallicence Long QT syndrome nationallicence Ion channellopathy nationallicence Congenital deafness nationallicence Consanguineous marriage nationallicence Chinagudi Surekharani Department of Physiology, S. N. Medical College, 587103, Navanagar, Bagalkot, India aut Patted Shiddanna Department of Physiology, S. N. Medical College, 587103, Navanagar, Bagalkot, India aut Herur Anita Department of Physiology, S. N. Medical College, 587103, Navanagar, Bagalkot, India aut Indian Journal of Otolaryngology and Head & Neck Surgery Springer-Verlag 62/1(2010-01-01), 44-48 0019-5421 62:1<44 2010 62 12070 https://doi.org/10.1007/s12070-010-0008-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12070-010-0008-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chinagudi Surekharani Department of Physiology, S. N. Medical College, 587103, Navanagar, Bagalkot, India aut NATIONALLICENCE 700 1- Patted Shiddanna Department of Physiology, S. N. Medical College, 587103, Navanagar, Bagalkot, India aut NATIONALLICENCE 700 1- Herur Anita Department of Physiology, S. N. Medical College, 587103, Navanagar, Bagalkot, India aut NATIONALLICENCE 773 0- Indian Journal of Otolaryngology and Head & Neck Surgery Springer-Verlag 62/1(2010-01-01), 44-48 0019-5421 62:1<44 2010 62 12070 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer