* Rate: 35–60 bpm * Rhythm: Irregular in single junctional<unk>  complex; regular in junctional<unk>  rhythm. * P waves: Depends on the site of the ectopic focus. They will be inverted, and may appear before or after the QRS complex, or they may be absent, hidden by the QRS. * P-R interval: If the P wave occurs before the QRS complex, the interval will be less than 0.12 seconds. * QRS Complex: Usually normal in duration and morphology, less than 0.12 seconds.
Junctional escape beat
Ventricular escape beat
Junctional rhythm
Electrical alternans
Infradian rhythm
High frequency QRS
Ultradian rhythm
Ectopic beat