Systems and methods for determining parameters for each of a plurality of vectors

A multi-electrode implantable medical device for determining parameters for each of a plurality of vectors in a single sequence having first, second, and third time periods, the device comprising:

• a pulse generator;
• a sensing circuit;
• and
• a controller circuit,
• wherein, in the first time period:
• the pulse generator is configured to output one or more pacing pulses using a first vector of the multi-electrode implantable medical device at an initialization voltage, the first vector defined by a first pair of electrodes of the multi-electrode implantable medical device;
• the sensing circuit is configured to determine a presence of phrenic stimulation and an impedance between the first pair of electrodes in response to the one or more pacing pulses output at the initialization voltage;
• and
• the controller circuit configured to store a measure related to the presence of phrenic stimulation and a measure related to the determined impedance between the first pair of electrodes for the first vector at the initialization voltage,
• wherein, in the second time period:
• the controller is configured to step down the initial voltage to a second pacing voltage;
• the pulse generator is configured to output one or more pacing pulses using the first vector at the second pacing voltage;
• the sensing circuit is configured to determine whether capture occurs in response to the one or more pacing pulses output at the second pacing voltage;
• and
• the controller circuit is configured to store a measure related to whether capture occurs for the first vector at the second pacing voltage, and
• wherein, in the third time period:
• the controller is configured to step down the second pacing voltage to a third pacing voltage;
• the pulse generator is configured to output one or more pacing pulses using the first vector at the third pacing voltage;
• the sensing circuit is configured to determine an electrical delay for the first vector in response to the one or more pacing pulses output at the third pacing voltage;
• and
• the controller is configured to store a measure related to the determined electrical delay for the first vector at the third pacing voltage.

A non-transitory machine readable medium, the non-transitory machine readable medium containing instructions, which, when executed by a processor, cause the processor to perform operations for determining parameters for each of a plurality of vectors of a multi-electrode implantable medical device in a single sequence having first, second, and third time periods, the operations comprising:

• in the first time period:
• outputting one or more pacing pulses using a first vector of the multi-electrode implantable medical device at an initialization voltage, the first vector defined by a first pair of electrodes of the multi-electrode implantable medical device;
• determining a presence of phrenic stimulation and an impedance between the first pair of electrodes in response to the one or more pacing pulses output at the initialization voltage;
• storing a measure related to the presence of phrenic stimulation and a measure related to the impedance between the first pair of electrodes for the first vector at the initialization voltage;
• in the second time period:
• stepping down the initialization voltage to a second pacing voltage;
• outputting one or more pacing pulses using the first vector at the second pacing voltage;
• determining whether capture occurs in response to the one or more pacing pulses output at the second pacing voltage;
• storing a measure related to whether capture occurs for the first vector at the second pacing voltage;
• and
• in the third time period:
• stepping down the second pacing voltage to a third pacing voltage;
• outputting one or more pacing pulses using the first vector at the third pacing voltage;
• determining an electrical delay for the first vector in response to the one or more pacing pulses output at the third pacing voltage;
• and
• storing a measure related to the determined electrical delay for the first vector at the third pacing voltage.