A pacemaker may be needed to relieve symptoms when no reversible cause — i.e. AV blocking medications or electrolyte disturbances — is found. The strip below shows a junctional rhythm with ...

A junctional rhythm occurs when the sinoatrial node (SA node) is not able to generate an action potential and the atrioventricular node (AV node) acts as the main pacemaker of the heart.

Pacemaker implantation may include a single chamber for chronic atrial fibrillation or dual chamber for paroxysmal or persistent atrial fibrillation. The timing of the AVJ ablation in regards to ...