QT interval
The heart has an electrical cycle. The Q wave is the start of that cycle in the ventricles, and the T wave is the end of it. The QT interval is the time between the Q wave and T wave. The ventricles contract during this interval.
The heart has an electrical cycle. The Q wave is the start of that cycle in the ventricles, and the T wave is the end of it. The QT interval is the time between the Q wave and T wave. The ventricles contract during this interval.
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