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ORIGINAL ARTICLE
Korean J Pediatr 2010 May;53(5) :644-647.
doi:https://doi.org/10.3345/kjp.2010.53.5.644
Electrocardiography as an early cardiac screening test in children with mitochondrial disease
Ran Baik (Baik R), Jung Hyun Chae (Chae JH), Young Mock Lee (Lee YM), Hoon Chul Kang (Kang HC), Joon Soo Lee (Lee JS), Heung Dong Kim (Kim HD)
Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea
Corresponding Author: Young Mock Lee ,Email: ymleemd@yumc.yonsei.ac.kr
Copyright © 2010 by The Korean Pediatric Society
ABSTRACT
Purpose : To evaluate myocardial conductivity to understand cardiac involvement in patients with mitochondrial disease. Methods : We performed retrospective study on fifty-seven nonspecific mitochondrial encephalopathy patients with no clinical cardiac manifestations. The patients were diagnosed with mitochondrial respiratory chain complex defects through biochemical enzyme assays of muscle tissue. We performed standard 12-lead electrocardiography (ECG) on all patients. Results : ECG abnormalities were observed in 30 patients (52.6%). Prolongation of the QTc interval (>440 ms) was seen in 19 patients (33.3%), widening of the corrected QRS interval in 15 (26.3%), and bundle branch block in four (7.0%). Atrioventricular block, premature atrial contraction and premature ventricular contraction were seen in two patients each (3.5%) and Wolff-Parkinson-White syndrome in one patient (1.8%). Conclusion : Given this finding, we recommend active screening with ECG in patients with mitochondrial disease even in patients without obvious cardiac manifestation.
Keywords: Electrocardiography | Mitochondria | Respiratory chain | Heart | Conductivity | Child
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