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A 31-year-old male asked:

Is it true that it takes 1-2 minutes for the qt interval to adapt to a new heart rate? ime if resting heart rate is 60 supine qtc 395 and you stand up the instant tachycardia would show a false prolonged qtc as it hasn't had time to adapt fully?

1 doctor answer • 1 doctor weighed in
Dr. Hiep Le
Dr. Hiep Leanswered
Nephrology and Dialysis 44 years experience
The corrected QT (QTc) interval is the QT interval corrected with heart rate. So if your heart rate goes up when standing, the corrected QT interval will be calculated with the new rate when EKG tracing is done which is instantly, not 1-2 minutes later.
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Answered May 31, 2022
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Last updated May 31, 2022

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