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Abstract

An electronic miniaturized, pocket-sized device for monitoring EKG and/or EEG signals and storing such signals. First, second and third electrodes are adapted for connection to a human body and first and second voltage amplifiers are electrically connected to respective ones of the first and second electrodes for producing first and second output signals having low noise content. A third amplifier is connected to both the first and second voltage amplifier for producing two output signals, one being the difference in voltage of the two voltage amplifiers as amplified and the second output being the difference of the bias voltages of the first and second voltage amplifiers. A lead fail detector includes voltage sensing device electrically connected to the second output of the third voltage amplifier and outputting a signal only when the difference of the bias voltages of the electrodes through the respective first and second voltage amplifiers is above a preselected level. A lead fail signalling device is electrically connected to the voltage sensing device and can be actuated by the output of any of the voltage sensors. In at least one voltage information providing device is connected to each of the output of the third voltage amplifier providing information to the user in a desired format.

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First Claim