SYSTEM AND METHOD FOR DERIVING A VIRTUAL ECG OR EGM SIGNAL

摘要

A system and method for obtaining a virtual physiologic voltage signal between a first predetermined point and a second selected point in the body is disclosed. At least three electrodes are used to measure two voltage signals S1 and S2 in a body. In one embodiment, the signal S1 is measured between a first electrode and a common electrode, and the signal S2 is measured between a second electrode and the common electrode. A selected point within the bosy may be chosen to define a pair of virtual eletrodes existing between this selected point and the common electrode. An approximation of the voltage signal S as could be measured between electrodes positioned at these virtual electrode locations may be derived as a function of S1, S2 and q, wherein is the angle between the directional vector U1 for the signal S1 and the directional vector U for the signal S.