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Am J Cardiol. 2005 Feb 1;95(3):406-9.

Heart rate influences on repolarization duration and morphology in symptomatic versus asymptomatic KCNQ1 mutation carriers.

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  • 1Service de Cardiologie, Groupe Hospitalier Lariboisière, Paris, France. fabrice.extramiana@lrb.ap-hop-paris.fr

Abstract

QT and Tp/Te intervals were longer in patients with LQT1 (n = 67) than in nonaffected subjects (n = 52) but did not differentiate symptomatic (n = 21) from asymptomatic patients (n = 46). At fast heart rate, the time to accumulate the last part of total T-wave area (the t50-97 interval) was longer in symptomatic carriers compared with asymptomatic patients (119 +/- 19 vs 106 +/- 15 ms, p <0.01). The latter group had significantly longer t50-97 intervals than nonaffected subjects (96 +/- 14 ms, p <0.01).

PMID:
15670556
[PubMed - indexed for MEDLINE]
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