Intractable late onset pacemaker endocarditis and complications case report.

Background: Cardiac implantable electronic devices (CIEDs), including pacemakers, have undeniably revolutionized the treatment of cardiac conditions. However, just like any other treatment or intervention some significant challenges can be encountered in CIEDs, mainly, CIED infections. With reported incidence rates ranging from 1 % to 15 % these infections can pose lead to dangerous complications. Our case report presents an occurrence of late-onset pacemaker endocarditis, which despite proper antibiotic therapy required an open-heart surgery as the only curative option.

Case presentation: Our patient is a 50-year-old female known to have a pacemaker implanted twenty years ago, she presented with fever and purulent discharge from her pacemaker site. After thorough investigations, diagnostic tests confirmed a Serratia marcescens infection and despite antibiotic treatment, the patient's symptoms persisted, an echocardiography revealed tricuspid valve involvement with vegetations. Surgical intervention, by complete removal of the old and new pacemaker leads, tricuspid valvuloplasty, and installation of an epicardial pacemaker, was performed.

Conclusion: Our case highlights the rarity and complexity of Serratia marcescens-related pacemaker endocarditis and all CIEDs in general, while emphasizing the importance of interdisciplinary management to optimize patient outcomes. Early diagnosis, prompt treatment, and comprehensive surgical approaches are essential in managing CIED infections and achieving successful outcomes.