Design and In Vivo Test of a Batteryless and Fully Wireless Implantable Asynchronous Pacing System


 Goal: The aim of this study is to develop a novel fully wireless and batteryless technology for cardiac pacing. Strategies: This technology uses radio frequency (RF) energy to power the implanted electrode in the center. An implantable electrode antenna was designed for 1.a pair of GHz; then, it had been tested in vitro and, subsequently, integrated with the rectifier and pacing circuit to create an entire electrode. The prototype implanted electrode was tested in vivo in an ovine subject, implanting it on the epicardial surface of the left ventricle. The RF energy, however, was transmitted to the implanted electrode using a horn antenna positioned twenty five cm above the thorax of the sheep. Results: It was demonstrated that a tiny implanted electrode can capture and harvest enough safe recommended RF energy to attain pacing. Electrocardiogram signals were recorded throughout the experiments, that demonstrated asynchronous pacing achieved at 3 completely different rates. Conclusion: These results show that the proposed technique contains a nice potential to be used for exciting the guts and provides pacing, without requiring any leads or batteries. It hence has the advantage of potentially lasting indefinitely and might never require replacement throughout the life of the patient. Significance: The proposed technique brings forward transformational potentialities in wireless cardiac pacing, and conjointly in powering up the implantable devices.

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