Fig. 2. Uncorrected QT  versus R-R interval relation (  A ) and heart rate–corrected QTc  versus R-R interval relation using Bazett (  B ) and Fridericia (  C ) formulas.  Solid lines represent linear regressions of these relations;  dashed lines represent the 95% confidence band of the regression lines. 

Fig. 2. Uncorrected QT  versus R-R interval relation (  A ) and heart rate–corrected QTc  versus R-R interval relation using Bazett (  B ) and Fridericia (  C ) formulas.  Solid lines represent linear regressions of these relations;  dashed lines represent the 95% confidence band of the regression lines. 

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