Cardiac methods and devices that separate signals using at least two composite signals acquired at least at two input impedances. A target source impedance may be selected, and a cardiac signal may be separated from composite signals using the selected target source impedance. Medical systems include...http://www.google.com/patents/US7996071?utm_source=gb-gplus-sharePatent US7996071 - Biopotential signal source separation using source impedances
Biopotential signal source separation using source impedances
