Patent ID: 8185213

Claim:
A wireless electrode assembly for electrical stimulation of heart tissue, comprising: a body portion, comprising: a circuit configured to wirelessly receive enough magnetically-coupled energy to deliver an electrical stimulation to myocardial tissue using at least a portion of the received magnetically-coupled energy; a tissue penetration surface, configured to initiate penetration of the body portion through a heart chamber wall and into myocardial tissue; and a guide wire channel, extending in a longitudinal direction relative to the body portion toward the tissue penetration surface, the guide wire channel including: a surface sized and shaped to permit the wireless electrode assembly to controllably advance over a guide wire instrument along a penetration path of a distal tip portion of the guide wire instrument, the penetration path through the heart chamber wall and into myocardial tissue, when the electrode assembly is engaged by an actuation member separate from the guide wire instrument; and wherein the wireless electrode assembly is sized and shaped to be implanted entirely within the myocardial tissue.