Importance

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Abstract

An analyzer system is provided for checking the compatibility between a cardiac pacer and the stimulation requirements of the patient within which the pacer is to be implanted. Apparatus is provided which is convenient for use in an operating room environment, including a single rotary switch for varying the value of all selectable functions and providing both audio and visual feedback to the operator. Two interacting digital processing circuits provide a plurality of output waveforms suitable for use in testing the cardiac pacer and for pacing the patient. One digital processor circuit provides routine control of an analog system for generating waveform shapes and for monitoring response from the cardiac pacer or the electrode leads implanted in the patient. Another digital processor circuit accepts input from the operation selection keys and the rotary switch, executes a variety of operative routines, and varies operating parameters of the analog system such as amplitude, interval, and duration. To permit operation over a wide range of parameter values, various circuits and operating routines are provided for enhancing the measurements where an otherwise low sensitivity and resulting loss of precision would be obtained.

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First Claim