Assessment of the Stability of the Individual‐Based Correction of QT Interval for Heart Rate
Population
205 healthy subjects with Holter recordings
Design
Other
Authors
Discussion
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Member takes
Implication
May inform research QT correction protocols; leaves open clinical adoption pending prospective validation.
Structured PICO
P
Population
205 healthy subjects with Holter recordings
I
Intervention
Modeling QT-R-R relationships using linear and parabolic regression techniques (individual regression model)
O
Outcome
Stability of the individual correction models as a function of the number of measurements, the range of heart rate, and the variance of R-R valuessurrogate
Approximately 400 QT-R-R measurements are required to ensure reliable individual correction of QT intervals for heart rate.
Cite This Study
Couderc et al. (2005) studied this question.