The most common cause to get a pacemaker is if the heart beats are too slow (bradycardia), or it pauses, causing fainting spells or other symptoms. In certain cases it can be used to prevent or treat heartbeats that is too fast (tachycardia) or irregular.
A pacemaker interrogation is a routine procedure. It is important to ensure the device is properly conducting electricity to and from your heart. It is recommended to interrogate a pacemaker every six months and in case of specialised ones like ICD/CRT, then it should be done preferably every three months. It is important to frequently follow-up as the battery may need replacement.