Methods and systems for managing synchronous conducted communication for an implantable medical device

A method for providing synchronous conducted communication for an implantable medical device (IMD), the method comprising:

• providing an IMD having a housing configured to be implanted entirely within a first region of a patient, the IMD including a controller, sensing circuitry, a receiver amplifier coupled to electrodes;
• utilizing the electrodes to sense conducted communications from a transmitting device;
• detecting physiologic events occurring in the first region;
• utilizing a receiver amplifier to receive conducted communications signals via the electrodes;
• establishing synchronous conducted communication with a transmit device;
• managing an on-off cycle of the receiver amplifier based on first and second receive window timing schemes;
• switching between the first and second receive window timing schemes based on a condition of the synchronous conducted communication;
• and
• using the controller to perform a calibration operation that maintains the second receive window timing scheme calibrated with a transmit window timing scheme of the transmit device by shifting a reference point defining a timing of the receive windows based on the timing difference.

A method, comprising:

• configuring first and second leadless implantable medical devices (LIMDs) to operate cooperatively in a DDD pacemaker mode;
• each of which includes a housing, electrodes, receive amplifier, sensing circuitry and a controller, the first and second LIMDs that configured to be implanted entirely within first and second chambers of the heart, respectively;
• detecting at least one of paced or sensed events at the first LIMD;
• defining a transmit window timing scheme for the first LIMD and a receive window timing scheme for the second LIMD, the transmit and receive window timing schemes including transmit and receive windows temporarily aligned with one another, the transmit and receive windows spaced apart by a window-to-window interval;
• when a paced or sensed event is detected at the first LIMD, transmitting, event related information in a next successive transmit window through conducted communication;
• receiving the event related information at the second LIMD during a receive window overlapping the next successive transmit window;
• managing delivery of pacing pulses at the second LIMD based on the event related information received from the first LIMD;
• and
• performing selective transmission at the first LIMD, in which paced or sensed event activity is included only in a subset of the transmit windows.