If necessary, direct antiarrhythmic therapy, including antiarrhythmic. If the block is caused by antiarrhythmic drugs Medications for Arrhythmias The need for treatment of arrhythmias depends on the symptoms and the seriousness of the arrhythmia. Most patients require a pacemaker Cardiac Pacemakers The need for treatment of arrhythmias depends on the symptoms and the seriousness of the arrhythmia. read more, which may also benefit asymptomatic patients with Mobitz type I second-degree AV block at infranodal sites detected by electrophysiologic studies done for other reasons. Treatment is pacemaker insertion Cardiac Pacemakers The need for treatment of arrhythmias depends on the symptoms and the seriousness of the arrhythmia. read more and transient or reversible causes have been excluded. Treatment is therefore unnecessary unless the block causes symptomatic bradycardia Bradyarrhythmias The normal heart beats in a regular, coordinated way because electrical impulses generated and spread by myocytes with unique electrical properties trigger a sequence of organized myocardial. If the block becomes complete, a reliable junctional escape rhythm typically develops. The block occurs at the AV node in about 75% of patients with a narrow QRS complex and at infranodal sites (His bundle, bundle branches, or fascicles) in the rest. Mobitz type I second-degree AV block may be physiologic in younger and more athletic patients.

A junctional escape rhythm