Figure 1.
Electrical current flowing between electrodes 1 and 8 of an antero-lateral smart drain. A) The Smart Drain with multiple electrode pairs placed for different sensitivity regions. A vector uses four electrodes in a tetrapolar measurement (two current and two voltage). Cardiac image derived from https://iheartanatomy.wordpress.com/. B) Equivalent electrical circuit diagram showing current passes through blood (Rb), myocardium (Rm and Cm), and lung (RL and CL).