We have developed a novel micropacemaker to address the critical problem of complete heart block in the fetus. Our novel design is a self-contained single-chamber micropacemaker that can be percutaneously implanted into the fetus without exteriorized leads, allowing for subsequent fetal movement without risk of electrode dislodgement. In this proposal, we plan to develop of an external recharging system for our micropacemaker system to allow a significant increase in device longevity from the 2-3 weeks anticipated with a single battery charge to successful pacing for the duration of normal gestation (up to 3-4 months after device implantation).

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