A cardiac stimulation system adapted to deliver impulses for pacing a His bundle of a patient heart using a stimulation electrode (16, 19, 216, 219) and to sense response characteristics of the His bundle and a ventricle of the patient heart using one or more sensing electrodes (22, 23, 26, 28, 36, 38) in response to impulses delivered by the stimulation electrode (16, 19, 216, 219), the cardiac stimulation system comprising: a pulse generator (70, 72) adapted to generate electrical impulses for pacing the His bundle; a processor communicatively coupled to the pulse generator (70, 72) and adapted to receive response characteristics from the one or more sensing electrodes (22, 23, 26, 28, 36, 38); and a memory communicatively coupled to the processor, characterized in that the memory including instructions executable by the processor that, when executed by the processor, cause the processor to: generate, using the pulse generator (70, 72), a plurality of impulses to induce a plurality of responses from the patient heart, each impulse corresponding to a different output setting of the pulse generator (70, 72); receive, from the sensing electrode (22, 23, 26, 28, 36, 38), response characteristics for each of the plurality of responses; assign each impulse a classification based on whether the respective response characteristics indicate capture of one or both of the His bundle and the ventricle; and for each impulse, store the output setting and the classification associated with the impulse in the memory. a pulse generator (70, 72) adapted to generate electrical impulses for pacing the His bundle; a processor communicatively coupled to the pulse generator (70, 72) and adapted to receive response characteristics from the one or more sensing electrodes (22, 23, 26, 28, 36, 38); and a memory communicatively coupled to the processor, characterized in that the memory including instructions executable by the processor that, when executed by the processor, cause the processor to: generate, using the pulse generator (70, 72), a plurality of impulses to induce a plurality of responses from the patient heart, each impulse corresponding to a different output setting of the pulse generator (70, 72); receive, from the sensing electrode (22, 23, 26, 28, 36, 38), response characteristics for each of the plurality of responses; assign each impulse a classification based on whether the respective response characteristics indicate capture of one or both of the His bundle and the ventricle; and for each impulse, store the output setting and the classification associated with the impulse in the memory. generate, using the pulse generator (70, 72), a plurality of impulses to induce a plurality of responses from the patient heart, each impulse corresponding to a different output setting of the pulse generator (70, 72); receive, from the sensing electrode (22, 23, 26, 28, 36, 38), response characteristics for each of the plurality of responses; assign each impulse a classification based on whether the respective response characteristics indicate capture of one or both of the His bundle and the ventricle; and for each impulse, store the output setting and the classification associated with the impulse in the memory.