The pacemaker detects that the battery is exhausted and needs to be replaced, otherwise the pacemaker will lose its protective effect.
When replacing, the electrodes are usually from the same company. The electrode leads can be used universally, and there is generally no need to implant new leads. However, if the time is too long, it will be difficult to remove the leads from the pacemaker or they will become worn, causing discomfort. If the pacing function is damaged, new electrode leads need to be replaced.
There are two ways to replace it. One is to keep the old ones and implant new ones, that is, there are two more electrodes in the heart, which will not have a great impact on the body; the other is to take out the old electrodes (no need to open the chest Surgery, using special equipment to pull it out of the heart), but the operation is difficult and carries certain risks.
The heart will hurt. It should be angina pectoris. It is recommended to undergo coronary angiography. If it is serious and requires stent implantation or bypass surgery, it can be treated conservatively with drugs.