Patent ID: 8538524

Claim:
A method for use with an implantable medical device equipped with a set of leads including a left ventricular (LV) lead having at least one proximal electrode implanted at a location sufficient to sense both atrial and ventricular events as substantially near-field events, the method comprising: sensing cardioelectrical events along a primary sensing channel connected to one or more of a right atrial (RA) lead and a right ventricular (RV) lead, the events sensed using the primary sensing channel including near-field events and other events; sensing cardioelectrical events along a secondary sensing channel connected to the proximal electrode of the LV lead, the events sensed using the secondary sensing channel including both atrial events and ventricular events; discriminating near-field events from other events on the primary sensing channel based on the atrial and ventricular events sensed along the secondary sensing channel connected to the proximal electrode of the LV lead.