Published in Hospital Business Week, December 9th, 2007
"QT intervals and the preceding R-R intervals were randomly measured by 24-hour Holter electrocardiogram in 29 patients with symptomatic arrhythmias. The slope of the regression curve was used as a marker of bradycardia-dependent QT prolongation. The slope was not different in patients without structural heart disease (0.34 +/- 0.10) as compared with the apparently normal control subjects (0.32 +/- 0.057, n = 29), whereas it was larger than that in patients with...
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