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P wave
depolarization of atria
PR interval
time it takes for the SA node to fire, atria to depolarize, and electricity to travel through the AV node. Delay in AV node
QRS complex/duration
time it takes for the ventricles to depolarize
ST segment
represents the early phase of ventricular repolarization
QT interval
one complete cycle of ventricular depolarization and repolarization
PP interval
time between atrial depolarization cycles
RR interval
time between ventricular depolarization cycles
T wave
ventricular repolarization