"It shows the time needed for the SA node impulse to depolarize the
atria and travel through the AV node."
Explanation:
The PR interval is measured from the beginning of the P wave to the
beginning of the QRS complex and represents the time needed for
sinus node stimulation, atrial depolarization, and conduction through
the AV node before ventricular depolarization. In a normal heart the
impulses do not travel backward. The PR interval does not include the
time it take to travel through the Purkinje fibers
P-R interval
atria and travel through the AV node."
Explanation:
The PR interval is measured from the beginning of the P wave to the
beginning of the QRS complex and represents the time needed for
sinus node stimulation, atrial depolarization, and conduction through
the AV node before ventricular depolarization. In a normal heart the
impulses do not travel backward. The PR interval does not include the
time it take to travel through the Purkinje fibers
P-R interval
