Which of the following statements is true regarding third-degree AV block?

Third-degree atrioventricular (AV) block, also known as complete heart block, is characterized by a complete dissociation between atrial and ventricular activity. In this condition, electrical signals originating in the atria do not reach the ventricles, often resulting in a slower and potentially life-threatening heart rate.

The necessity for pacemaker placement arises because, in third-degree AV block, the body is not able to adequately perfuse due to the loss of coordinated contractions between the chambers of the heart. The standard treatment for this block is the implantation of a permanent pacemaker to restore synchronized electrical conduction and ensure the heart maintains an appropriate rhythm and rate.

While some patients with third-degree AV block may present with subtle symptoms, many can be symptomatic, experiencing dizziness, syncope, or fatigue due to insufficient cardiac output caused by the irregular conduction. This contrasts with the idea that it is usually asymptomatic. Moreover, this type of block does not typically resolve spontaneously as it is often a result of structural changes in the heart or damage to the conduction system. Although beta-blockers can be used in various arrhythmias and cardiac conditions, they are not appropriate for the management of third-degree AV block as they can exacerbate bradycardia by reducing