Extracardiac evoked-response sensing

A system comprising:

• an extracardiac elongated structure configured to be navigated from an access point of a patient to a target site within a patient, wherein a distal portion of the elongated structure comprises a set of electrodes;
• and
• a stimulation device configured to be coupled to the extracardiac elongated structure, wherein the stimulation device comprises:
• stimulation circuitry;
• sensing circuitry;
• and
• processing circuitry configured to:
• control the stimulation circuitry to deliver, based on a set of stimulation parameters, a set of stimulation pulses to the target site;
• control the sensing circuitry to sense, based on a set of sensing parameters, a set of evoked response signals from the target site, wherein each evoked response signal of the set of evoked response signals is in response to a corresponding stimulation pulse from the set of stimulation pulses;
• measure a set of evoked response parameters for the set of evoked response signals;
• and
• determine, based on the set of stimulation parameters and the set of evoked response parameters, a likelihood of sensation at the target site from a pacing therapy.

A method comprising:

• delivering a set of stimulation pulses to the target site based on a set of stimulation parameters;
• sensing a set of evoked response signals from the target site, wherein each evoked response signal of the set of evoked response signals is in response to a corresponding stimulation pulse from the set of stimulation pulses;
• measuring a set of evoked response parameters for the set of evoked response signals;
• and
• determining, based on the set of stimulation parameters and the set of evoked response parameters, a likelihood of sensation at the target site from a pacing therapy.