A device for monitoring physiological parameters of a patient comprising: a circuit for mimicking a driven right leg electrode using a chest reference electrode as proxy therefor; the circuit comprising: a connection to a first electrocardiogram electrode (108, 109); a connection to a second electrocardiogram electrode (108, 109); a connection to a reference electrocardiogram electrode; and, an amplifier; the electrode connections (202, 204) all connected to the amplifier; the amplifier maintaining the voltage of the first and second electrodes (108, 109) level, the proxy driven right leg signal being measurable using the reference electrode, wherein the circuit is a flexible circuit embedded in a flat elastic substrate having a top surface and a bottom surface, the flexible circuit having (i) the electrodes (108, 109, 110) mounted in and communicative through the bottom surface of the flat elastic substrate, the electrodes (108, 109, 110) being capable of electrical communication with the patient, and the circuit further having (ii) at least one signal processing module for accepting signals from the electrodes and transforming such signals for storage as patient data; (iii) at least one memory module for accepting and storing patient data, (iv) at least one data communication module for transferring stored patient data to an external device, and (v) a control module for controlling the timing and operation of the electrodes, the at least one signal processing module, the at least one memory module, and the at least one data communication module, the control module capable of receiving commands to implement transfer of patient data by the at least one data communication module and to erase and/or wipe patient data from the at least one memory module; characterized by an anisotropically conductive adhesive (113; 113a) removably attached to the bottom surface of the flat elastic substrate, the anisotropically conductive adhesive (113; 113a) capable of adhering to skin of the patient and of conducting an electrical signal substantially only in a direction perpendicular to the skin, the anisotropically conductive adhesive including non-conductive portions and conductive portions, the conductive portions being disposed in conductive contact with the electrodes (108, 109, 110). a circuit for mimicking a driven right leg electrode using a chest reference electrode as proxy therefor; the circuit comprising: a connection to a first electrocardiogram electrode (108, 109); a connection to a second electrocardiogram electrode (108, 109); a connection to a reference electrocardiogram electrode; and, an amplifier; the electrode connections (202, 204) all connected to the amplifier; the amplifier maintaining the voltage of the first and second electrodes (108, 109) level, the proxy driven right leg signal being measurable using the reference electrode, a connection to a first electrocardiogram electrode (108, 109); a connection to a second electrocardiogram electrode (108, 109); a connection to a reference electrocardiogram electrode; and, an amplifier; the electrode connections (202, 204) all connected to the amplifier; the amplifier maintaining the voltage of the first and second electrodes (108, 109) level, the proxy driven right leg signal being measurable using the reference electrode, wherein the circuit is a flexible circuit embedded in a flat elastic substrate having a top surface and a bottom surface, the flexible circuit having (i) the electrodes (108, 109, 110) mounted in and communicative through the bottom surface of the flat elastic substrate, the electrodes (108, 109, 110) being capable of electrical communication with the patient, and the circuit further having (ii) at least one signal processing module for accepting signals from the electrodes and transforming such signals for storage as patient data; (iii) at least one memory module for accepting and storing patient data, (iv) at least one data communication module for transferring stored patient data to an external device, and (v) a control module for controlling the timing and operation of the electrodes, the at least one signal processing module, the at least one memory module, and the at least one data communication module, the control module capable of receiving commands to implement transfer of patient data by the at least one data communication module and to erase and/or wipe patient data from the at least one memory module; characterized by (i) the electrodes (108, 109, 110) mounted in and communicative through the bottom surface of the flat elastic substrate, the electrodes (108, 109, 110) being capable of electrical communication with the patient, and the circuit further having (ii) at least one signal processing module for accepting signals from the electrodes and transforming such signals for storage as patient data; (iii) at least one memory module for accepting and storing patient data, (iv) at least one data communication module for transferring stored patient data to an external device, and (v) a control module for controlling the timing and operation of the electrodes, the at least one signal processing module, the at least one memory module, and the at least one data communication module, the control module capable of receiving commands to implement transfer of patient data by the at least one data communication module and to erase and/or wipe patient data from the at least one memory module; characterized by