Patent
Pacemaker artifact suppression in coronary monitoring
Thomas F Marchese,Rauf S Argon +1 more
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TLDR
In this paper, the authors provide circuitry for suppressing the recharge waveform portion of a pacer signal artifact in addition to suppression of the discharge pulse portion of the signal artifact, thereby to prevent inaccuracies in the heart rate indication arising from the pacer signals.Abstract:
In heart monitoring systems for use with patients whose hearts may be stimulated by an artificial pacer and which system includes heart rate indicating means, there is provided circuitry for suppressing the recharge waveform portion of a pacer signal artifact in addition to suppression of the discharge pulse portion of the signal artifact, thereby to prevent inaccuracies in the heart rate indication arising from the pacer signal artifact. In addition to suppressing the discharge pulse portion of a pacer signal artifact with conventional means, the invention recognizes that the recharge waveform of the pacer signal may cause a false impression of a QRS complex which actuates heart rate indicating means and provides novel circuitry for suppressing such recharge waveform. Circuitry is provided for recognizing the occurrence of a pacer discharge pulse and for generating a suppression signal in timed relation thereto which, when arithmetically added to the recharge waveform portion, acts to cancel or suppress such recharge portion. The suppression signal is of inverse polarity to the recharge waveform portion and is generated by sampling the pacer signal artifact substantially at the beginning of the recharge waveform to determine the magnitude thereof. In a preferred embodiment, a pacer signal artifact and the termination of the discharge pulse portion thereof is identified by novel rate and duration measuring circuitry.read more
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Patent
Apparatus for sensing and transmitting a pacemaker's stimulating pulse
TL;DR: In this paper, the authors present an approach for sensing and transmitting the stimulating pulse of an implanted pacemaker over readily available, low-bandwidth transmission media to a remote receiver capable of measuring the pulse width to provide an indication of the condition of the pacemaker energy source, e.g. battery.
Patent
Cardiac signal augmentation apparatus
Peter Stasz,Louis C Cosentino +1 more
TL;DR: In this paper, the pacemaker artifact signals and EKG signals are received and recombined for use in telephone transmission, and a pacemaker rate monitor is used for monitoring.
Patent
System for mutually exclusive monitoring of natural heartbeat and pacer-stimulated heartbeat
TL;DR: A pacer and R-wave monitor system is described in this article, which includes a heartbeat detector and circuitry that distinguishes natural heartbeats from pacer-stimulated heartbeasts.