Abstract
The objective of this study is to determine the prevalence of an abnormal electrocardiogram showing a prolonged QTc greater than 450 ms in infants with unilateral or bilateral sensorineural hearing loss. We conducted a prospective study of healthy term infants (≥37 weeks gestational age) who failed their newborn auditory brainstem response hearing screen, were seen by an audiologist and diagnosed as having sensorineural hearing loss during follow-up to 1 year of age. In infants with a diagnosis of hearing loss, we collected a detailed family history and performed an ECG between 2 and 6 months of age. We obtained follow-up for 1 year by calling the parent requesting the hearing and cardiac status of their child. Two of the 40 infants with sensorineural hearing loss (5%) had a QTc greater than 450 ms. Both had mild bilateral hearing loss and genetic testing did not identify a known mutation for long QT syndrome. The remaining 38 infants had QTc intervals of ≤ 450 ms. One patient diagnosed with bilateral severe sensorineural hearing loss had a normal ECG (QTc = 417 ms). Several months after the ECG was performed, the infant’s mother contacted the study cardiologist after she learned that the infant’s maternal grandmother was diagnosed with a cardiomyopathy and arrhythmias. Genetic testing was recommended even though the child was asymptomatic and was positive for a pathogenic mutation in the KCNQ1 gene. We speculate that molecular genetic testing in infants with hearing loss may become the standard of care rather than targeted electrocardiograms.
Clinical Trial Registration NCT02082431 https://www.clinicaltrials.gov/ct2/show/NCT02692521?cond=NCT02692521&rank=1.
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Acknowledgements
Principal investigators were as follows: Kartik Mody, MD, St. Joseph’s Hospital and Banner University Center, Phoenix, AZ; Sara Neumann, AuD, Hearts for Hearing, Oklahoma City, OK; Seema LaGree, AuD, Presbyterian Ear Institute, Albuquerque, and NM; Patricia Lake, AuD, Lawrence and Memorial Hospital, New London, CT. Melanie H. Drummond, RN, BSN, The Children’s Hospital of San Antonio, San Antonio, TX; Katy Kohlleppel, RN, BSN, The Children’s Hospital of San Antonio, San Antonio, TX; Joanna Shilling, Hearing Screen Coordinator/Clinical Care Coordinator, Swedish American Hospital, Rockford, IL. We would also like to recognize Jaclyn Cohen, RN, Nalina Fisher, BS, Octavia Reed, RN, BSN, Kathy McCarty, and Theresa Katich for administrative support with the study and Beverly Gail Lim, ARNP, AuD for her help with planning the study.
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MAA: collected the data, and critically analyzed, reviewed, and revised the manuscript for important intellectual content. RHC: conceptualized and designed the study, drafted the initial manuscript and critically analyzed, reviewed, and revised the manuscript for important intellectual content. MIC: conceptualized and designed the study, collected the data, and critically analyzed, reviewed, and revised the manuscript for important intellectual content. ALF: designed the study, collected the data, and critically analyzed, reviewed, and revised the manuscript for important intellectual content. ASK: conceptualized and designed the study, drafted the initial manuscript and critically analyzed, reviewed, and revised the manuscript for important intellectual content. GCM: designed the study, collected the data, and critically analyzed, reviewed, and revised the manuscript for important intellectual content. CLM: collected the data, and critically analyzed, reviewed, and revised the manuscript for important intellectual content. EDR: collected the data, and critically analyzed, reviewed, and revised the manuscript for important intellectual content. DPS: collected the data, and critically analyzed, reviewed, and revised the manuscript for important intellectual content. JAY: designed the study, collected the data, and critically analyzed, reviewed, and revised the manuscript for important intellectual content. All authors approved the final manuscript as submitted and agree to be accountable for all aspects of the work.
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Fenrich, A.L., Shmorhun, D.P., Martin, G.C. et al. Long QT and Hearing Loss in High-Risk Infants Prospective Study Registry. Pediatr Cardiol 43, 1898–1902 (2022). https://doi.org/10.1007/s00246-022-02939-4
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DOI: https://doi.org/10.1007/s00246-022-02939-4