Patent ID: 8738147

Claim:
A wireless electrostimulation system comprising: a wireless energy transmission source, including an inductive antenna, configured to generate a time-varying magnetic flux; a cardiovascular wireless electrostimulation node sized and shaped to be implantable using a percutaneous transluminal catheter delivery system, the cardiovascular wireless electrostimulation node comprising: a receiver circuit configured to capture at least enough inductively-coupled energy from the inductive antenna to generate a tissue electrostimulation, the receiver circuit comprising a mechanically-expandable inductive pickup including an expandable coil configured to receive the time-varying magnetic flux, the inductive pickup comprising a core material including a relative magnetic permeability less than 1.1, wherein the mechanically-expandable inductive pickup comprises an expandable mechanical support comprising a loop of shape-memory material mechanically coupled to the expandable coil; a strut coupling the expandable mechanical support to a housing of the cardiovascular wireless electrostimulation node, the strut including a portion that controls an implant depth of the cardiovascular wireless electrostimulation node in myocardial tissue when the portion is pressed against a tissue surface; and a tissue electrostimulation circuit, coupled to the receiver circuit, configured to deliver energy captured by the receiver circuit as a specified tissue electrostimulation waveform, the tissue electrostimulation circuit comprising at least one tissue electrostimulation electrode; and a therapy control unit, communicatively coupled to the cardiovascular wireless electrostimulation node and configured to initiate a delivery of a tissue electrostimulation by the tissue electrostimulation electrode.