—A new study shows that SCD is linked to prolonged P-wave duration, even in individuals with no coincident cardiovascular conditions or atrial fibrillation. Share on Facebook. Opens in a new tab ...

A junctional rhythm occurs when the electrical activation of the heart originates near or within ... originates at or near the AV node, the P wave is frequently not seen; it can be buried within ...

acts as the main pacemaker of the heart. In this instance, the P wave morphology (normally generated when the SA node fires causing atrial depolarizaion) will be altered since its origin is no ...