Patent ID: 8825159

Claim:
An apparatus comprising: a catheter arrangement configured for use in capturing myocardium of a heart of a patient, the catheter arrangement comprising: a fixation mechanism configured to attach the catheter arrangement to heart tissue at a target region that is at or near the His bundle of the heart on a portion of the right ventricular septum that is distal to an apex of the right ventricle of the heart; at least two individually-addressable electrodes configured to provide electrostimulation signals to the heart tissue; and an elongated structure configured to direct and to support the fixation mechanism and the individually-addressable electrodes at the target region that is at or near the His bundle of the heart on a portion of the right ventricular septum that is distal to an apex of the right ventricle of the heart; and a pulse generation circuit electrically coupled to the at least two individually-addressable electrodes and configured to generate electrostimulation signals for delivery to different portions within the target region using the at least two individually-addressable electrodes; wherein the pulse generation circuit is configured to change the electrostimulation signal from being delivered in a first mode to being delivered in a second mode when the fixation mechanism has been attached to the heart tissue at the target region.