System and method for displaying an emulated surface EKG using an external programming device
First Claim
1. A method for emulating and displaying a surface electrocardiogram (EKG) of a patient in which an implantable cardiac stimulation device is implanted, the method comprising:
- sensing first and second cardiac signals;
emulating the surface EKG of the patient by identifying a pair of baseline points in each of the first and second cardiac signals and selectively concatenating that portion of the first cardiac signal that lies between the pair of baseline points with that portion of the second cardiac signal that lies outside the pair of baseline points, using the baseline points as concatenation points; and
displaying the emulated surface EKG using a device external to the patient.
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Accused Products
Abstract
A surface electrocardiogram (EKG) is emulated using signals detected by the internal leads of an implanted device. In one example, the emulation is performed using a technique that concatenates portions of signals sensed using different electrodes. In another example, the emulation is performed using a technique that selectively amplifies or attenuates portions of a single cardiac signal sensed using a single pair of electrodes. The surface EKG emulation may be performed by the implanted device itself or by an external device, such as a programmer, based on cardiac signals transmitted thereto. The external device then displays the emulated surface EKG along with an intracardiac electrogram (IEGM) and set of event markers. Alternatively, the external device displays an entire set of emulated EKGs that had been generated based on the same patient input data but using different emulation techniques. The emulated EKGs are displayed along with an actual surface EKG for the patient so that a physician may easily identify the optimal emulation technique for that patient.
28 Citations
14 Claims
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1. A method for emulating and displaying a surface electrocardiogram (EKG) of a patient in which an implantable cardiac stimulation device is implanted, the method comprising:
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sensing first and second cardiac signals; emulating the surface EKG of the patient by identifying a pair of baseline points in each of the first and second cardiac signals and selectively concatenating that portion of the first cardiac signal that lies between the pair of baseline points with that portion of the second cardiac signal that lies outside the pair of baseline points, using the baseline points as concatenation points; and displaying the emulated surface EKG using a device external to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification