Patent ID: 8244339

Claim:
A method, comprising: delivering a non-stimulating electrical current using a first dipole located along a first body location and comprising a first electrode and a second electrode; measuring a voltage signal using a second dipole located at a second body location spaced apart from the first body location, the measured voltage signal corresponding to the electrical current being conducted through a portion of the patient's body, the second dipole comprising a third electrode and a fourth electrode different than the first electrode and the second electrode; computing a pulsatility metric in response to the measured voltage signal; detecting a physiological condition in response to the pulsatility metric; and sensing a physiological signal using a transducer at the first body location, wherein delivering the non-stimulating electrical current comprises wirelessly transmitting a data signal correlated to the physiological signal through the portion of the patient's body to a processor configured to receive the data signal.