Early CIED Pocket Infection — EECC MCQ

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ModerateArrhythmia & ElectrophysiologyEarly CIED Pocket InfectionEECC

A 55-year-old man with symptomatic bradycardia (sinus pauses >6 seconds causing syncope) undergoes DDD pacemaker implantation. One week later, he develops fever and erythema at the device pocket. Wound swab grows Staphylococcus aureus. What is the classification of this CIED infection?

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Correct answer: D — Early CIED pocket infection (<12 months post-implant) — requires assessment for lead involvement (blood cultures, TOE); if isolated pocket infection without lead involvement, complete system extraction with IV antibiotics is still the recommended approach

CIED infections are classified by timing: early (<12 months — typically S. aureus, wound contamination during implant) vs late (>12 months — often S. epidermidis, haematogenous seeding). AND by extent: pocket infection vs lead endocarditis vs bloodstream infection. The 2023 ESC IE Guidelines and BHRS guidance recommend: (1) ALL CIED infections (including apparently isolated pocket infections): complete system extraction (generator + ALL leads) is recommended — even 'isolated' pocket infections have concurrent lead colonisation in 30-50% of cases, and partial treatment (antibiotics alone or generator exchange without lead extraction) has unacceptable failure rates (>50%); (2) IV antibiotics for 10-14 days for pocket infection (longer if lead endocarditis — 4-6 weeks); (3) blood cultures to exclude bacteraemia; (4) TOE to exclude lead vegetations; (5) reimplantation at a contralateral site after blood culture clearance.

Reference: ESC (2023): IE Guidelines; BHRS CIED Infection