Inflammatory biomarkers as predictors of systemic vs isolated pocket infection in patients undergoing transvenous...

Area of Science:

• Cardiology
• Infectious Diseases
• Biomarkers

Background:

• Cardiovascular implantable electronic device (CIED) infections are a frequent reason for device extraction.
• Diagnosing CIED pocket infections is difficult due to subtle symptoms, potentially delaying necessary extraction.
• Early detection and complete device removal are vital for patient outcomes.

Purpose of the Study:

• To investigate the utility of inflammatory biomarkers in diagnosing isolated CIED pocket infections.
• To assess if biomarkers can differentiate pocket infections from systemic infections or absence of infection.

Main Methods:

• Retrospective analysis of 156 patients undergoing transvenous lead extraction for CIED infection.
• Classification of patients into systemic infection (n=88) or isolated pocket infection (n=68) groups.
• Comparison of preoperative procalcitonin (PCT), C-reactive protein, and white blood cell count between groups and controls.

Main Results:

• Procalcitonin (PCT) was significantly higher in systemic infection compared to controls and pocket infection groups.
• No significant difference in PCT was observed between isolated pocket infection and control groups.
• Elevated white blood cell count was associated only with systemic infection, not pocket infection.

Conclusions:

• Inflammatory biomarkers are not elevated in isolated CIED pocket infections requiring extraction.
• Current inflammatory markers are not predictive for diagnosing CIED pocket infections.
• Diagnosis of CIED pocket infections relies heavily on clinical suspicion.