QT Interval Unit Converter
Convert between ms, s
Also known as: QT Duration, Uncorrected QT, Absolute QT, Raw QT
Convert QT Interval
What is QT Interval?
The QT interval is a measurement on an electrocardiogram (ECG) that represents the time it takes for the heart's ventricles to depolarize (contract) and then repolarize (recover) before the next heartbeat.
It is measured from the beginning of the QRS complex to the end of the T wave. The normal QT interval varies with heart rate, so it is typically corrected for heart rate and reported as QTc (corrected QT interval).
Normal QTc values are generally considered to be 350-450 ms in men and 350-460 ms in women. Values outside these ranges may indicate abnormal cardiac electrical activity that requires further evaluation.
Where Does QT Interval Come From?
The QT interval is generated by the electrical activity of the heart's ventricular muscle cells. It reflects the flow of ions (potassium, sodium, and calcium) through specialized channels in cardiac cell membranes during each heartbeat cycle.
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