In a normal EKG, what should the QT interval be less than?

The QT interval on an electrocardiogram (EKG) represents the time from the beginning of ventricular depolarization to the end of ventricular repolarization. This interval is crucial as it indicates the duration of electrical activity in the ventricles.

A normal QT interval, which reflects a healthy heart's electrical activity, is typically considered to be less than 0.44 seconds in adults. Beyond this duration, there may be an increased risk for serious arrhythmias. Thus, the correct response of 0.44 seconds aligns with established medical guidelines regarding normal physiological limits.

In a normal EKG assessment, knowing the appropriate QT interval is essential for evaluating potential cardiac risks. A QT interval that exceeds this threshold may warrant further investigation, particularly in cases of syncope or family history of cardiac events.