METHOD, APPARATUS AND PRODUCT FOR ACQUIRING CARDIAC IMAGES
First Claim
1. A method for acquiring cardiac information from a patient having a pacer for pacing a heart rhythm, an abnormal EKG, or an abnormal heartbeat, the method comprising:
- placing a signal injection device proximate the pacer of the patient and injecting a signal across a skin barrier of the patient toward the pacer;
in response to the signal received at the pacer, pacing the patient'"'"'s heart in a fixed asynchronous pacing mode; and
acquiring cardiac information relating to the patient'"'"'s fixed asynchronously paced heart.
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Accused Products
Abstract
A method for acquiring cardiac information from a patient having a pacer for pacing a heart rhythm, an abnormal EKG, or an abnormal heartbeat is disclosed. The method includes: placing a signal injection device proximate the pacer of the patient and injecting a signal across a skin barrier of the patient toward the pacer; in response to the signal received at the pacer, pacing the patient'"'"'s heart in a fixed asynchronous pacing mode; and, acquiring cardiac information relating to the patient'"'"'s fixed asynchronously paced heart.
56 Citations
19 Claims
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1. A method for acquiring cardiac information from a patient having a pacer for pacing a heart rhythm, an abnormal EKG, or an abnormal heartbeat, the method comprising:
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placing a signal injection device proximate the pacer of the patient and injecting a signal across a skin barrier of the patient toward the pacer;
in response to the signal received at the pacer, pacing the patient'"'"'s heart in a fixed asynchronous pacing mode; and
acquiring cardiac information relating to the patient'"'"'s fixed asynchronously paced heart. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for acquiring a cardiac image from a patient having a pacer for pacing a heart rhythm, an abnormal EKG, or an abnormal heartbeat, the method comprising:
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receiving a gated electrocardiogram signal having local maxima and minima values and trigger points;
determining for a period of time the time between each trigger point and the local maxima or minima associated therewith;
in response to the trigger point occurring at the associated local maxima or minima, calculating a zero time differential for a corrected trigger for gating;
in response to the trigger point occurring prior to the associated local maxima or minima, calculating a time delay for the corrected trigger;
in response to the trigger point occurring after the associated local maxima or minima, calculating a time advancement for the corrected trigger;
sending the corrected trigger to a cardiac image acquisition device for gating, wherein the gating is substantially synchronized with the local maxima or minima of the gated electrocardiogram signal;
placing a signal injection device proximate the pacer of the patient and injecting a signal across a skin barrier of the patient toward the pacer;
in response to the signal received at the pacer, pacing the patient'"'"'s heart in a fixed asynchronous pacing mode; and
acquiring a cardiac image of the patient'"'"'s fixed asynchronously paced heart. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An apparatus having electrocardiogram-gated acquisition and cardiac imaging capabilities for use with a patient having a pacer, the apparatus comprising:
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an electrocardiograph;
a cardiac scanner in signal communication with the electrocardiograph;
an interface board in signal communication intermediate the electrocardiograph and the cardiac scanner; and
a storage medium, readable by a processing circuit, storing instructions for execution by the processing circuit for;
receiving from the electrocardiograph a gated electrocardiogram signal having local maxima and minima values and trigger points;
determining for a period of time the time between each trigger point and the local maxima or minima associated therewith;
in response to the trigger point occurring at the associated local maxima or minima, calculating a zero time differential for a corrected trigger for gating; and
in response to the trigger point occurring prior to the associated local maxima or minima, calculating a time delay for the corrected trigger;
in response to the trigger point occurring after the associated local maxima or minima, calculating a time advancement for the corrected trigger;
sending the corrected trigger to a cardiac image acquisition device for gating, wherein the gating is substantially synchronized with the local maxima or minima of the electrocardiogram signal;
wherein the patient is responsive to a signal injection device placed proximate the pacer of the patient, the signal injection device being adapted to inject a signal across a skin barrier of the patient toward the pacer;
wherein in response to the signal being received at the pacer, the patient'"'"'s heart is paced in a fixed asynchronous pacing mode; and
acquiring a cardiac image at the cardiac image acquisition device of the patient'"'"'s fixed asynchronously paced heart. - View Dependent Claims (17, 18, 19)
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Specification