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Prolonged T‐wave peak–end interval in Down syndrome patients with congenitally normal hearts
Author(s) -
Küçük Mehmet,
Karadeniz Cem,
Ozdemir Rahmi,
Meşe Timur
Publication year - 2018
Publication title -
pediatrics international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.49
H-Index - 63
eISSN - 1442-200X
pISSN - 1328-8067
DOI - 10.1111/ped.13567
Subject(s) - medicine , repolarization , qt interval , cardiology , ventricular repolarization , electrocardiography , long qt syndrome , heart rate , blood pressure , electrophysiology
Background Heterogeneity of ventricular repolarization has been assessed using the QT dispersion in Down syndrome ( DS ) patients with congenitally normal hearts. Novel repolarization indexes, that is, T‐wave peak–end (Tp‐e) interval and Tp‐e/ QT ratio, however, have not previously been evaluated in these patients. The aim of this study was therefore to evaluate the Tp‐e interval and Tp‐e/ QT ratio in DS patients without congenital heart defects. Methods Tp‐e interval, Tp‐e dispersion, and Tp‐e/ QT ratio were compared between 160 DS patients and 110 age‐ and sex‐matched healthy controls on 12‐lead surface electrocardiogram. Results Heart rate, Tp‐e interval, Tp‐e dispersion, Tp‐e/ QT and Tp‐e/ QT c ratios were significantly higher in the DS group than the control group. Conclusion Myocardial repolarization indexes in DS patients with congenitally normal hearts were found to be prolonged compared with those in normal controls. Further evaluation is warranted to elucidate the relationship between prolonged repolarization indexes and arrhythmic events in these patients.