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 ...

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 ...

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 ...

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 ...

In Mobitz type I second-degree AV block, the PR interval progressively lengthens from beat to beat, until there is a non-conducted P wave with no QRS complex (figure 7). The first PR interval after ...