Outpatient parenteral antibiotic therapy for infective endocarditis: a review of 4 years' experience at a UK centre

David George Partridge, Emma O'Brien, Ann L N Chapman
Postgraduate Medical Journal 2012, 88 (1041): 377-81

OBJECTIVES: To review the role of outpatient parenteral antibiotic therapy (OPAT) in the management of infective endocarditis (IE) with the aim to guide further development of the service modality both locally and at other centres, in light of the evolving recommendations on patient suitability in international guidelines.

METHODS: A retrospective case review of all patients receiving OPAT for IE in Sheffield between January 2006 and October 2010 was conducted. Data were collected on site and microbiology of infection, antibiotic regimens, adverse events during OPAT therapy and outcomes were studied.

RESULTS: A total of 36 episodes of IE were treated in 34 patients. All patients received initial treatment as inpatients. Treatment was successful in 34/36 episodes (94.4%) with no evidence of recurrence at a median of 30 months follow-up. One patient had a relapse 2 months after completion of OPAT for enterococcal endocarditis and was found to have concurrent chronic prostatitis. One patient died of a ruptured pulmonary root abscess while receiving OPAT. Adverse events occurred in 12 episodes (33.3%), of which seven were line associated. In four cases adverse events resulted in re-hospitalisation. A successful outcome was achieved in 22/24 episodes (91.7%) deemed to be less suitable for OPAT due to higher risk of complications by Infectious Diseases Society of America guidelines.

CONCLUSIONS: OPAT is a safe and effective means of completing therapy for IE, including prosthetic valve endocarditis and other cases at a higher risk of complicated disease. However, the relatively high rate of adverse events highlights the need for well-developed protocols and policies for patient selection and follow-up within the context of a formal OPAT service.

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