Which imaging study can identify cardiac device infection early, before morphological damage?

Which imaging study can identify cardiac device infection early, before morphological damage?

• A. Echocardiography
• B. MRI
• C. FDG-PET/CT
• D. CT angiography

Answer: (C)

Detecting infection early hinges on spotting metabolic activity from inflammatory cells around a cardiac device before the tissue shows structural, morphological damage. FDG-PET/CT does this by imaging cellular glucose uptake: inflamed or infected tissue lights up with FDG, revealing focal uptake along device pockets or leads even when there are no visible vegetations or anatomical changes yet. This functional insight makes it more sensitive to early device-associated infection than morphologic imaging alone. Echocardiography looks for actual structural signs like vegetations or lead complications, which may be absent in the very early stages. MRI can be challenging with implanted devices and is less reliable for early infection signaling. CT angiography shows anatomy and complications but not the inflammatory activity itself. FDG-PET/CT complements these by detecting the inflammatory process early, guiding timely management such as targeted antibiotics and decisions about device removal when needed.

Detecting infection early hinges on spotting metabolic activity from inflammatory cells around a cardiac device before the tissue shows structural, morphological damage. FDG-PET/CT does this by imaging cellular glucose uptake: inflamed or infected tissue lights up with FDG, revealing focal uptake along device pockets or leads even when there are no visible vegetations or anatomical changes yet. This functional insight makes it more sensitive to early device-associated infection than morphologic imaging alone.

Echocardiography looks for actual structural signs like vegetations or lead complications, which may be absent in the very early stages. MRI can be challenging with implanted devices and is less reliable for early infection signaling. CT angiography shows anatomy and complications but not the inflammatory activity itself. FDG-PET/CT complements these by detecting the inflammatory process early, guiding timely management such as targeted antibiotics and decisions about device removal when needed.