The morphology of the P wave will not be similar to the sinus P wave, which is normally upright in lead II and biphasic in lead V1. Often, the P wave is inverted in lead II, if it can be seen at all.

The QRS complex consists of the Q wave, the R wave and the S wave. The QRS complex comes after the P wave when the SA nodal action potential travels through the AV node to the ventricles to cause ...

A P wave occurs before each QRS complex (+); therefore, this is A sensing V pacing or P-wave synchronous ventricular pacing. The P waves are positive in leads I, II, aVF, and V4-V6, This is a ...

If a P wave occurs at point "c" when both bundle branches have recovered from the refractory period, then the atrial impulse will conduct to the ventricles normally (the QRS complex labeled c in ...

P Waves: P waves are the first “bump” on the EKG.They represent the time when the atria, the upper chambers of the heart, are squeezing blood through the heart. QRS Complex: The QRS complex is ...

A junctional or nodal rhythm occurs when the QRS rate is faster than the resting P wave or sinus rate which is slowed in athletes due to increased vagal tone . The QRS rate for junctional rhythms is ...