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Wireless, battery-free, fully implantable multimodal and multisite pacemakers for applications in small animal models
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Wireless, battery-free, fully implantable multimodal and multisite pacemakers for applications in small animal models
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Journal Article
Wireless, battery-free, fully implantable multimodal and multisite pacemakers for applications in small animal models
2019
Overview
Small animals support a wide range of pathological phenotypes and genotypes as versatile, affordable models for pathogenesis of cardiovascular diseases and for exploration of strategies in electrotherapy, gene therapy, and optogenetics. Pacing tools in such contexts are currently limited to tethered embodiments that constrain animal behaviors and experimental designs. Here, we introduce a highly miniaturized wireless energy-harvesting and digital communication electronics for thin, miniaturized pacing platforms weighing 110 mg with capabilities for subdermal implantation and tolerance to over 200,000 multiaxial cycles of strain without degradation in electrical or optical performance. Multimodal and multisite pacing in ex vivo and in vivo studies over many days demonstrate chronic stability and excellent biocompatibility. Optogenetic stimulation of cardiac cycles with in-animal control and induction of heart failure through chronic pacing serve as examples of modes of operation relevant to fundamental and applied cardiovascular research and biomedical technology.
Pacing tools that support small animals and can serve as models for pathogenesis of cardiovascular diseases are currently not available. Here, the authors report a miniaturized wireless battery-free implantable multimodal and multisite pacemaker that provides unlimited stimulation to test subjects.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
