MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Repolarization of the ventricles
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Depolarization of the atria
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Depolarization of the ventricles
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The time required for the ventricles to undergo a single cycle of depolarization
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Detailed explanation-1: -The QT interval represents the time for both ventricular depolarization and repolarization to occur, and therefore roughly estimates the duration of an average ventricular action potential. This interval can range from 0.20 to 0.40 seconds depending upon heart rate.
Detailed explanation-2: -The QT interval represents the duration of ventricular depolarization and subsequent repolarization. This duration resides between the beginning of the QRS complex to the end of the T wave.
Detailed explanation-3: -The QT interval is a measurement that represents the total time from ventricular depolarization to complete repolarization. This process begins at the start of the q wave and extends to the end of the T wave. If there is no q wave, then the starting point would be the very beginning of the R wave.
Detailed explanation-4: -The QT interval is the time from the beginning of the QRS complex, representing ventricular depolarization, to the end of the T wave, resulting from ventricular repolarization.