Junctional rhythm - also called junctional escape rhythm - originates from the AV junction (AV node and Bundle of His). The expected pacemaker rate of the AV junction is 40-60 / minute. In lead II, a junctional rhythm presents with inverted or absent P waves. Note: an absent P wave in junctional rhythm is also associated with loss of atrial kick.
By ECG is characterized by a heart rate of 40-60 bpm, with absent or inverted P waves and narrow QRS complexes.
If it occurs after heart surgery, healthcare providers may correct electrolyte imbalances, manage fever, or prescribe medications to slow the heart rate. Other options include using amiodarone to restore normal rhythm
If you want more information about this disease, visit the following link where you will find informative videos or books.