An apparatus for recording potentials on a body surface comprising: a plurality of wireless electrodes for monitoring potentials on the body surface, the plurality of wireless electrodes incorporated into a support, band or garment, each wireless electrode having a relatively unique identifier and configured to attach to a different location on the body surface, each wireless electrode comprising an error detecting circuit and a transmitting circuit configured to transmit a measured voltage or an electrode condition over a wireless link; a receiver for receiving, over the wireless link, measured voltage(s) and/or electrode condition(s) transmitted by a subset of the wireless electrodes incorporated into the support, band or garment; and a controller separate from the support, band or garment and configured to: monitor the plurality of wireless electrodes incorporated into the support, band or garment; determine whether a first wireless electrode incorporated into the support, band or garment and included in the subset is functional and has acceptable signal to noise ratio and, if the first wireless electrode is not functional or does not have acceptable signal to noise ratio, to determine whether a second wireless electrode of the plurality of wireless electrodes incorporated into the support, band or garment is available, the second electrode not included in the subset, and in response to the second wireless electrode being available, to select the second wireless electrode, to obtain a signal from the second wireless electrode, and in response to the signal from the second wireless electrode, to determine whether the second wireless electrode is functional and has acceptable signal to noise ratio and, in response to determining that the second wireless electrode is functional and has acceptable signal to noise ratio, to select the second wireless electrode to be included in the subset to supplement or replace the first wireless electrode. a plurality of wireless electrodes for monitoring potentials on the body surface, the plurality of wireless electrodes incorporated into a support, band or garment, each wireless electrode having a relatively unique identifier and configured to attach to a different location on the body surface, each wireless electrode comprising an error detecting circuit and a transmitting circuit configured to transmit a measured voltage or an electrode condition over a wireless link; a receiver for receiving, over the wireless link, measured voltage(s) and/or electrode condition(s) transmitted by a subset of the wireless electrodes incorporated into the support, band or garment; and a controller separate from the support, band or garment and configured to: monitor the plurality of wireless electrodes incorporated into the support, band or garment; determine whether a first wireless electrode incorporated into the support, band or garment and included in the subset is functional and has acceptable signal to noise ratio and, if the first wireless electrode is not functional or does not have acceptable signal to noise ratio, to determine whether a second wireless electrode of the plurality of wireless electrodes incorporated into the support, band or garment is available, the second electrode not included in the subset, and in response to the second wireless electrode being available, to select the second wireless electrode, to obtain a signal from the second wireless electrode, and in response to the signal from the second wireless electrode, to determine whether the second wireless electrode is functional and has acceptable signal to noise ratio and, in response to determining that the second wireless electrode is functional and has acceptable signal to noise ratio, to select the second wireless electrode to be included in the subset to supplement or replace the first wireless electrode. monitor the plurality of wireless electrodes incorporated into the support, band or garment; determine whether a first wireless electrode incorporated into the support, band or garment and included in the subset is functional and has acceptable signal to noise ratio and, if the first wireless electrode is not functional or does not have acceptable signal to noise ratio, to determine whether a second wireless electrode of the plurality of wireless electrodes incorporated into the support, band or garment is available, the second electrode not included in the subset, and in response to the second wireless electrode being available, to select the second wireless electrode, to obtain a signal from the second wireless electrode, and in response to the signal from the second wireless electrode, to determine whether the second wireless electrode is functional and has acceptable signal to noise ratio and, in response to determining that the second wireless electrode is functional and has acceptable signal to noise ratio, to select the second wireless electrode to be included in the subset to supplement or replace the first wireless electrode.