Implantable cardiac monitor

Case contributed by Desiree Rassa Eshraghi


History of hypertension, hypersensitivity lung disease, coronary artery disease status post percutaneous coronary intervention (3x, last 4 years ago), sick sinus status post pacemaker, and implantable cardiac monitor for syncope.

Patient Data

Age: 65 years
Gender: Male

The dual lead left-sided cardiac pacemaker and its right atrial and right ventricular leads are in appropriate position.

The implantable cardiac monitor/implantable loop recorder is seen projecting over the left mid-lung zone on this exam with mild rotation to the left.

Mild irregular bibasilar opacities are likely fibro-atelectasis. 

No acute cardio-pulmonary process.

Case Discussion

The implantable loop recorder (ILR), also known as an insertable cardiac monitor (ICM), diagnoses heart rhythm disorders as a subcutaneous device. The ILR investigates unexplained recurrent syncope with uncertain diagnosis and reveal possible relationships with cardiac arrhythmias. In addition, the ILR is equipped with algorithms to detect atrial fibrillation episodes.

This case was submitted with supervision and input from:
Soni C. Chawla, M.D.
Health Sciences Clinical Professor,
Department of Radiological Sciences,
David Geffen School of Medicine at UCLA.
Attending Pediatric Radiologist,
Olive View - UCLA Medical Center.

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