QTc Interval Unit Converter
Convert between ms, s
Also known as: QTc, QTc Duration, Corrected QT Interval, QT Interval, Heart Rate Corrected QT
Convert QTc Interval
What is QTc Interval?
The QTc interval is a corrected measurement of the time it takes for your heart's ventricles to depolarize (contract) and repolarize (recover) between beats. It is derived from the QT interval on an electrocardiogram (ECG/EKG) and adjusted for heart rate.
The "c" in QTc stands for "corrected." Because the QT interval naturally shortens when your heart beats faster and lengthens when it beats slower, the QTc standardizes the measurement to allow comparison across different heart rates.
Normal QTc values are generally below 440 ms in men and 460 ms in women. A QTc greater than 500 ms is associated with significantly increased risk of dangerous heart rhythms.
Where Does QTc Interval Come From?
The QTc interval is measured from an electrocardiogram and reflects the electrical activity generated by ion channels (potassium, sodium, and calcium) in the heart's ventricular muscle cells. These ion channels control the timing of each heartbeat's contraction and recovery phases.
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