The Power Course

Which part of the ECG corresponds to ventricular repolarization


1 ) The P wave
2 ) The QRS complex
3 ) The T wave
4 ) The U wave
5 ) The PR interval


ECG has P, QRS, T and U waves. it has PR, QT,  and ST Interval. and segments PR and ST 

ECG Waves

P wave  Atrial depolarization
QRS complex Ventricular depolarization
T wave Ventricular repolarization
U wave U inconsistent may be due to ventricular myocytes long action potential

ECG Intervals

Intervals Normal duration in seconds The corresponding event in the heart
  Average Range  
PR Interval 0.18 0.12 to 0.20 Atrioventricular conduction
QRS duration 0.08 to 0.10 Ventricular depolarization
QT interval 0.40 to 0.43 Ventricular action potential
ST interval 0.32   Plateau portion of ventricular action potential

ref Ganog page 514 edition 26th


The T wave

Last Modified : 25-Dec-2019

Previous MCQ
Next MCQ
Enter your email address:



Previous Years Question Papers