Multi-electrode implantable medical device

An implantable medical device (IMD), comprising:

• a device body extending from a proximal portion to a distal portion along a longitudinal axis;
• a fixation component comprising:
• a penetrator tine extending away from the distal portion of the device body and configurated to penetrate a tissue;
• an electrode interface assembly comprising:
• an elongated body extending from the distal portion of the device body, the elongated body defining a first recess and a second recess;
• a first electrode extending away from the electrode interface assembly, the first electrode being disposed within the first recess;
• and
• a second electrode extending away from the electrode interface assembly, the second electrode being disposed within the second recess,
• wherein the first electrode is configured to form a first electrical circuit with the tissue, wherein the second electrode is configured to form a second electrical circuit with the tissue, and wherein the elongated body is configured to place the first electrode and the second electrode in contact with the tissue.

A medical device system comprising:

• an implantable medical device (IMD) comprising:
• a device body extending from a proximal portion to a distal portion along a longitudinal axis;
• a leadlet extending away from the distal portion of the device body, the leadlet comprising a first electrode disposed on a distal end of the leadlet;
• a fixation component comprising a penetrator tine extending from the distal portion of the device body and configured to penetrate a tissue;
• an elongated body extending from the distal portion of the device body, the elongated body defining a groove configured to receive the leadlet;
• and
• a second electrode disposed within a recess of the elongated body, wherein the elongated body is configured to place the second electrode in contact with the tissue;
• and
• a delivery tool comprising a tubular sidewall that defines a lumen into which the IMD may be loaded, wherein the lumen has a distal opening through which the IMD may be deployed.