In a method for operating an implantable heart stimulating device with atrial overdrive capability having an atrial stimulation unit for stimulating the atrium via stimulation electrode(s), an atrial evoked response detector determines an atrial evoked response amplitude, and an atrial control unit controls...http://www.google.de/patents/US7761156?utm_source=gb-gplus-sharePatent US7761156 - Method for operating an implantable cardiac stimulator to set the atrial stimulation time interval dependent on the evoked response amplitude
