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 ...

Because the electrical activation originates at or near the AV node, the P wave is frequently not seen; it can be buried within the QRS complex, slightly before the QRS complex or slightly after ...

In atrioventricular reciprocating tachycardia, atrial activity (P waves) may be seen after the QRS complex, although this atrial depolarization is often obscured by the T wave. When atrial ...

The QT/QTc intervals are prolonged (320/470 msec) but are normal when the prolonged QRS complex duration is considered (260/380 msec). A P wave occurs before each QRS complex (+); therefore ...

On an EKG, A-fib will typically have an irregular appearance, such as the absence of a P wave in the EKG signal ... T Waves, and the QRS Complex. These may have abnormalities in people with ...