A surface electrocardiogram (EKG) is emulated using signals detected by the internal leads of an implanted device. In one example, the emulation is performed using a technique that concatenates portions of signals sensed using different electrodes, such as by combining far-field ventricular signals sensed...http://www.google.de/patents/US7383080?utm_source=gb-gplus-sharePatent US7383080 - System and method for emulating a surface EKG using internal cardiac signals sensed by an implantable medical device
