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http://dx.doi.org/10.3345/kjp.2010.53.5.644

Electrocardiography as an early cardiac screening test in children with mitochondrial disease  

Baik, Ran (Department of Pediatrics, Yonsei University College of Medicine)
Chae, Jung-Hyun (Department of Pediatrics, Yonsei University College of Medicine)
Lee, Young-Mock (Department of Pediatrics, Yonsei University College of Medicine)
Kang, Hoon-Chul (Department of Pediatrics, Yonsei University College of Medicine)
Lee, Joon-Soo (Department of Pediatrics, Yonsei University College of Medicine)
Kim, Heung-Dong (Department of Pediatrics, Yonsei University College of Medicine)
Publication Information
Clinical and Experimental Pediatrics / v.53, no.5, 2010 , pp. 644-647 More about this Journal
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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