This calculator is intended for use by health care providers. The results should not be used alone to determine medical treatment. This tool is a statistical model and is not a substitute for an individual treatment plan developed by a health care provider with personal knowledge of a specific patient. Factors such as medical history and the health care provider’s experience, knowledge, and training must also be considered. Results should be discussed with patients when presenting prognoses or treatment recommendations.

Mayo Clinic corrected QT interval (QTc) calculator

This calculator calculates the heart rate-corrected QT interval and guides prescription decisions to prevent drug-induced QT interval prolongation.

beats per minute
Baseline rhythm
QT interval unit
ms
The group #groups/inputData/normalOrWide/qtInterval/ms is hidden
    Behavior: no behavior
    small boxes
    The group #groups/inputData/normalOrWide/qtInterval/smallBoxes is hidden
      Behavior: no behavior
      seconds
      The group #groups/inputData/normalOrWide/qtInterval/seconds is hidden
        Behavior: no behavior
        The group #groups/inputData/normalOrWide is hidden
        • {"question":"#groups/inputData/baselineRhythm/data","answerCoding":{"code":"wide"}}
          evaluated to RuleResult.Fail 
        • {"question":"#groups/inputData/baselineRhythm/data","answerCoding":{"code":"normal"}}
          evaluated to RuleResult.Fail
        Behavior: Any pass
        ms
        The group #groups/inputData/wide/qrsDuration/ms is hidden
          Behavior: no behavior
          small boxes
          The group #groups/inputData/wide/qrsDuration/smallBoxes is hidden
            Behavior: no behavior
            seconds
            The group #groups/inputData/wide/qrsDuration/seconds is hidden
              Behavior: no behavior
              The group #groups/inputData/wide is hidden
              • {"question":"#groups/inputData/baselineRhythm/data","answerCoding":{"code":"wide"}}
                evaluated to RuleResult.Fail
              Behavior: Any pass
              ms
              ms
              The group #groups/inputData/afibQt/ms is hidden
                Behavior: no behavior
                small boxes
                small boxes
                The group #groups/inputData/afibQt/smallBoxes is hidden
                  Behavior: no behavior
                  seconds
                  seconds
                  The group #groups/inputData/afibQt/seconds is hidden
                    Behavior: no behavior
                    The group #groups/inputData/afibQt is hidden
                    • {"question":"#groups/inputData/baselineRhythm/data","answerCoding":{"code":"afib"}}
                      evaluated to RuleResult.Fail
                    Behavior: Any pass

                    Urgent guidance for navigating and circumventing the QTc-prolonging and torsadogenic potential of possible pharmacotherapies for coronavirus disease 19 (COVID-19). Mayo Clinic Proceedings, 2020

                    The QT interval: An emerging vital sign for the precision medicine era? Circulation, 2019

                    Version: 0.1.10
                    April 20, 2022