Which condition indicates the need for an external cardiac pacemaker?

The need for an external cardiac pacemaker is most clearly indicated by symptomatic complete heart block. This condition, also known as third-degree atrioventricular block, occurs when there is a complete interruption of electrical conduction between the atria and ventricles of the heart. As a result, the heart's ability to pump blood effectively is compromised, often leading to significant symptoms such as dizziness, fatigue, or syncope (fainting).

In cases of symptomatic complete heart block, the heart may experience a very slow and ineffective rate, which can lead to inadequate blood flow to vital organs. An external cardiac pacemaker provides an immediate solution by delivering electrical impulses to the heart, thereby ensuring that it beats at an appropriate rate and maintains adequate circulation.

Other conditions mentioned, such as symptomatic atrial fibrillation, ventricular tachycardia, and bradycardia, may also require intervention, but they do not typically necessitate the immediate use of an external pacemaker in the same way that symptomatic complete heart block does. For instance, atrial fibrillation might be managed with medications or other interventions rather than a pacing device, while bradycardia can often be treated with atropine or may resolve on its own. Ventricular tachycardia