What causes pneumonia after pacemaker surgery?

Pneumonia after pacemaker surgery can be caused by several factors, including the use of general anesthesia, which may lead to respiratory complications. Additionally, the surgical procedure can result in decreased mobility and shallow breathing, increasing the risk of lung infections. Patients may also have pre-existing conditions or weakened immune systems that predispose them to pneumonia. Furthermore, the presence of foreign material, such as the pacemaker itself, can increase the risk of infection.