information on what the P wave represents. The P wave is the first positive wave
in the normal cardiac conduction pattern and it represents movement of the
electrical impulse through the atria resulting in atrial contraction. (2016 Jones and
Bartlett Publishers/Anatomy and Physiology).
The first deflection is the P wave that is associated with right and left
atrial depolarization. The wave of atrial repolarization is invisible only because of
low amplitude. The normal size of the P wave is no more than 2.5 mm tall and l
less than 120 ms in width in any lead. In lead II, the P wave should be upright if
it is originating from the SA node.
The P wave can