Radiolucent implantable electrocardiographic monitoring device based on graphene

Conventional implantable electrocardiogram monitors are impenetrable to electromagnetic radiation, posing challenges in imaging (i.e. X-rays). In this study, we demonstrate a radiolucent implantable electrocardiogram (ECG) device using graphene sheets and Parylene substrate which allows bypassing of electromagnetic radiation through the implanted device. Evaluated on a canine model, the graphene electrodes detect signals comparable to those recorded using surface electrodes, presenting a valuable and novel modality for medium and long-term monitoring of cardiac rhythm. When compared with current technology, the new system has the distinct advantages of being flexible and radiolucent, thereby improving patient comfort, and avoiding device artifact and shadowing on clinical radiographic imaging.