Cardiac resynchronization therapy in children.

Curr Cardiol Rev · 2009 · PMC2803287 · PMID 20066147

Europe PMC DOI

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may be significantno p-value reported

The QRS duration varies with age such that there may be significant mechanical dyssynchrony despite a QRS duration <120ms in a child.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.