Wave, Complexes and Intervals
P wave
The P waves represent the electrical impulse starting in the SA
node and spreading through the Atria. Therefore the P wave
represents atrial depolarization. Always in front of the QRS
The QRS complex represents ventricular depolarization.
The Q wave
The first negative deflection after the P wave
The R wave
The R wave is the first positive deflection after the P wave
The S wave
The first negative deflection after the R wave
The T wave
It represents ventricular repolarization (when the cells regain a
negative charge; also called the resting state)
The U wave
Thought to represent repolarization of the purkinje fibers; although
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- Winter '13
- Prof.Tao
- Cardiac electrophysiology, Electrical conduction system of the heart, sinus bradycardia
