Abstract:
BACKGROUND:We recently reported that electrocardiographic abnormalities are common in adults with monosomy X (Turner syndrome), but this issue has not been investigated in girls with Turner syndrome. PATIENTS AND METHODS:We analyzed electrocardiograms in 78 girls with Turner syndrome and 50 age-matched control girls. The girls with Turner syndrome had additional cardiac and metabolic evaluations. RESULTS:Girls with Turner syndrome were more likely to demonstrate > or = 1 electrocardiographic findings including right axis deviation, right ventricular hypertrophy, accelerated atrioventricular conduction, T-wave abnormalities, and a prolonged rate-corrected QT interval. The right-sided findings were associated with partial anomalous pulmonary venous connection, but the etiology of the other findings remains unknown. The rate-corrected QT interval was significantly longer in girls with Turner syndrome (431 +/- 22 vs 407 +/- 21 milliseconds). Twenty-eight girls with Turner syndrome but only 2 controls had a rate-corrected QT interval above the reference range. We found no correlation between body habitus, cardiac dimensions, or metabolic parameters and the rate-corrected QT interval duration in girls with Turner syndrome. CONCLUSIONS:Cardiac conduction and repolarization abnormalities seem to affect both young girls and adults with Turner syndrome equally, suggesting that electrophysiologic defects are intrinsic to the syndrome and indicating that electrocardiogram analysis should be included in evaluating and monitoring even the youngest patients with Turner syndrome. Attention to the rate-corrected QT interval is important, because some common medications may further prolong this interval and increase the risk of arrhythmias.
journal_name
Pediatricsjournal_title
Pediatricsauthors
Bondy CA,Ceniceros I,Van PL,Bakalov VK,Rosing DRdoi
10.1542/peds.2006-0776subject
Has Abstractpub_date
2006-10-01 00:00:00pages
e1220-5issue
4eissn
0031-4005issn
1098-4275pii
118/4/e1220journal_volume
118pub_type
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