The compensatory pause after the PVC is slightly longer than the junctional escape interval and allows the junctional rhythm to escape for 5 beats. During this period, the P waves from the sinus ...

The unusual wide QRS complex, tachycardic rhythm that changes morphology and axis within a few beats (see V1 rhythm strip at that bottom) is characteristic of polymorphic (meaning many shapes ...

Figure 1 shows rhythm strips of leads I, II, and V1. What is happening in the middle of the strips following a premature ventricular complex (PVC ...