Embedded Files
Time interval from the onset of atrial depolarization (beginning of P wave) to the onset of ventricular depolarization (beginning of QRS)
Reflects atrial impulse conduction to the ventricle
Normal PR intervals last between 120-200 ms (3-5 small boxes)
PR intervals > 200 ms (1 big box, 5 small boxes) are seen in AV blocks
PR intervals < 120 ms are seen in pre-excitation syndromes and junctional rhythms
Page updated
Google Sites
Report abuse