Which complication requires immediate medical attention following pacemaker implantation?

Following pacemaker implantation, signs of infection or a hematoma are complications that require immediate medical attention. Infections can develop at the surgical site, leading to serious consequences if not promptly treated. Symptoms may include redness, swelling, warmth, or drainage at the site, and these signs indicate that the body is reacting negatively to the procedure. Similarly, a hematoma, which is a localized collection of blood outside of blood vessels, can cause swelling and may pressure surrounding tissues, potentially affecting the pacemaker's function or leading to complications like bleeding.

This urgency is contrasted with other options such as post-operative swelling, which can be a normal response to surgery, and severe pain, which may or may not be associated with a complication. Normal healing and soreness typically occur and may be expected after such procedures. Recognizing the signs of infection or excessive bleeding necessitates prompt intervention to ensure patient safety and prevent further complications.