Ambulatory monitor
First Claim
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1. An ambulatory monitor for monitoring the action of a pacemaker and cardiac response of a patient fitted with a pacemaker, the monitor comprising:
- a pair of electrodes for coupling to a patient to monitor pacemaker pulses and analog ECG signals, said analog ECG signals being amplified for recording;
a spike detector for detecting said pacemaker pulses from said electrodes, said spike detector having means for generating a first signal indicating the occurrence of said pacemaker pulses;
an A/D converter for detecting said amplified analog ECG signals from said electrodes, said A/D converter generating a second signal, said second signal is a digital version of said analog ECG signal indicating the occurrence of said amplified analog ECG signal;
an analyzer connected to said spike detector and said A/D converter, said analyzer comprising;
a) means for determining a time of occurrence of said pacemaker pulses from said first signal, and means for determining a time of occurrence of said ECG signal from said second signal;
b) means for determining in real time, a timing relationship between said first and second signals;
c) means for analyzing in real time, the timing relationship and a shape of said second signal; and
d) means for generating in real time, composite data signals defining;
a time of occurrence of each of said first and second signals;
a first and a second indication identifying said first signal as said pacemaker pulse and said second signal as said ECG signal; and
a third indication denoting the shape of said first and second signals; and
recording means for recording said composite data signals on a first channel of said recording means.
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Abstract
An ambulatory monitor for monitoring the action of a pacemaker and the cardiac response of a patient fitted with a pacemaker. The monitor comprises a detection electrode coupled in use to the patient for detecting pacemaker pulses and cardiac responses; an analyser connected to the detection electrode for
a) analysing the relationship between the detected pacemaker impulses and cardiac responses,
b) analysing the shape and timing of the cardiac responses, and
c) generating corresponding data signals; and a recorder for recording the data signals.
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Citations
13 Claims
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1. An ambulatory monitor for monitoring the action of a pacemaker and cardiac response of a patient fitted with a pacemaker, the monitor comprising:
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a pair of electrodes for coupling to a patient to monitor pacemaker pulses and analog ECG signals, said analog ECG signals being amplified for recording; a spike detector for detecting said pacemaker pulses from said electrodes, said spike detector having means for generating a first signal indicating the occurrence of said pacemaker pulses; an A/D converter for detecting said amplified analog ECG signals from said electrodes, said A/D converter generating a second signal, said second signal is a digital version of said analog ECG signal indicating the occurrence of said amplified analog ECG signal; an analyzer connected to said spike detector and said A/D converter, said analyzer comprising; a) means for determining a time of occurrence of said pacemaker pulses from said first signal, and means for determining a time of occurrence of said ECG signal from said second signal; b) means for determining in real time, a timing relationship between said first and second signals; c) means for analyzing in real time, the timing relationship and a shape of said second signal; and d) means for generating in real time, composite data signals defining; a time of occurrence of each of said first and second signals; a first and a second indication identifying said first signal as said pacemaker pulse and said second signal as said ECG signal; and a third indication denoting the shape of said first and second signals; and recording means for recording said composite data signals on a first channel of said recording means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for monitoring the action of a pacemaker and cardiac response of a patient fitted with a pacemaker using an ambulatory monitor, the method comprising:
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attaching a pair of electrodes for coupling to a patient to monitor pacemaker pulses and analog ECG signals; amplifying said analog ECG signals and said pacemaker pulses; detecting said amplified pacemaker pulses using a spike detector; generating a first signal from the spike detector for indicating the occurrence of said pacemaker impulses; detecting said analog ECG signals by means of an A/D converter, said A/D converter generated a second signal indicating the occurrence of said analog ECG signal, said second signal is a digital version of said analog ECG signal; processing said first and second signals by means of an analyzer, the processing steps comprising; a) determining a time of occurrence of the pacemaker pulse from said first signal and determining a time of occurrence of the ECG signal from said second signal; b) determining in real time, a timing relationship between said first and second signals; c) analyzing in real time, the timing relationship and a shape of said second signal; and d) generating in real time, composite data signals defining; a time of occurrence of each of said first and second signals; a first and second indications identifying said first signal as said pacemaker pulse and said second signal as said ECG signal; a third indication denoting the shape of said first and second signals; and recording said composite data signals on a first channel of a recording means, in real time. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification