On which side of the body is a pacemaker generally implanted?

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The placement of a pacemaker is typically on the left side of the body, often near the pectinate muscle. This location is chosen due to anatomical considerations that facilitate easier access to the heart's electrical pathways and minimize complications. The left side allows for optimal lead placement, particularly for capturing the left ventricle, which is essential in various pacing scenarios.

The left-sided positioning helps in threading the pacemaker lead through the subclavian vein into the right atrium and ventricle effectively. Additionally, the proximity to the heart minimizes the distance the leads must travel, which improves the overall function of the device. Therefore, implanting the pacemaker on the left side enhances access while ensuring the device can perform effectively in regulating the heart's rhythm.