Management is dependent upon the severity, or degree, of the blockage, the consistency of symptoms, as well as the cause of the<unk> . Patients with first-degree<unk>  do not have any resulting severe or life-threatening symptoms, such as symptomatic bradycardia or hypotension, and, thus, do not require treatment. Similarly, patients with second-degree Mobitz I<unk>  rarely develop life-threatening symptoms, and patients who are asymptomatic do not require treatment. However, in some cases, patients with Mobitz I block can develop life-threatening symptoms that require intervention. These patients often respond well to atropine, but may require temporary transcutaneous pacing or transvenous pacing until they are no longer symptomatic. Patients with second-degree Mobitz II and third-degree heart block are much more likely to have symptomatic bradycardia and hemodynamic instability, such as hypotension. Additionally, there is an increased risk of patients with Mobitz II heart block developing third-degree heart block. Therefore, these patients often require temporary pacing with transcutaneous or transvenous pacing wires, and many will ultimately require a permanent implanted pacemaker. If the heart block is found to be caused by a reversible condition, such as Lyme disease, the underlying condition should first be treated. Often, this will lead to resolution of the heart block and the associated symptoms.
Atrioventricular block
Left bundle branch block
Right bundle branch block
Sinoatrial block
Ectopic beat
Bundle branch block
Sinus arrhythmia
Junctional tachycardia