In which situation would a pacemaker be necessary?

A pacemaker is necessary in situations where there is bradycardia, which refers to an abnormally slow heart rate. Bradycardia can cause symptoms such as fatigue, dizziness, and fainting because the heart is not pumping enough blood to meet the body's needs. A pacemaker helps by providing electrical stimulation to the heart, thereby regulating the heartbeat and ensuring adequate blood flow.

In contrast, tachycardia, which is characterized by an elevated heart rate, does not typically require a pacemaker; rather, it may be managed with medications or other interventions depending on the underlying cause. Surgical procedures and exercise stress tests do not inherently necessitate a pacemaker. While some patients may have underlying heart conditions that require a pacemaker and might encounter these situations, the primary indication for a pacemaker remains persistent bradycardia specifically indicating the need for mechanical assistance in heartbeat regulation.