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To the Editor:We read with interest the article by Kurl et al1 investigating the interaction between prolongation of QRS and risk of sudden death. Different degrees of QRS elongation are shown to be predictive of an increase in the risk of sudden death, and these observations are broadly consistent with previous ones. However, it is relevant to know the rate of …

circulation

Letter by Gnecchi-Ruscone and Guazzi Regarding Article, “Duration of QRS Complex in Resting Electrocardiogram Is a Predictor of Sudden Cardiac Death in Men”