Implantable medical device (IMD) system configurable to subject a patient to a stress test and to detect myocardial ischemia within the patient
First Claim
1. An implantable medical device (IMD) for implantation in a patient, comprising pacing circuitry configured to selectively produce pacing pulses at a programmable pacing rate for delivery to muscle tissue of a heart of the patient, wherein the IMD is configurable to subject the patient to a stress test, and wherein during the stress test:
- (i) the pacing rate is increased from a start rate to a stop rate, wherein the stop rate is greater than the start rate, and (ii) stress test data is acquired and stored within the IMD.
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Accused Products
Abstract
Various implantable medical devices (IMDs) are disclosed for implantation in a patient. The IMD includes pacing circuitry configured to selectively produce pacing pulses at a programmable pacing rate. In one embodiment, the IMD is configurable to subject a patient to a stress test. The IMD may be configurable to subject the patient to the stress test at the time specified by stored timing information, or in response to a signal (e.g., from a patient activator). Another embodiment of the implantable medical device (IMD) includes sensor circuitry, a memory for storing data, and a control unit. The sensor circuitry produces sensor data relating to cardiac condition. The control unit is configurable to store the sensor data in the memory until a trigger signal is received. Methods are described for performing a stress test in a patient with an IMD, and for subsequently reproducing cardiac operational states.
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Citations
78 Claims
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1. An implantable medical device (IMD) for implantation in a patient, comprising pacing circuitry configured to selectively produce pacing pulses at a programmable pacing rate for delivery to muscle tissue of a heart of the patient, wherein the IMD is configurable to subject the patient to a stress test, and wherein during the stress test:
- (i) the pacing rate is increased from a start rate to a stop rate, wherein the stop rate is greater than the start rate, and (ii) stress test data is acquired and stored within the IMD.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An implantable medical device for implantation in a patient, comprising:
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pacing circuitry configured to selectively produce pacing pulses at a programmable pacing rate for delivery to muscle tissue of a heart of the patient;
a memory for storing data; and
a control unit coupled to the pacing circuitry and the memory, wherein the control unit is configurable to subject the patient to a stress test, and wherein during the stress test the control unit;
(i) programs the pacing rate such that the pacing rate is increased from a start rate to a stop rate, wherein the stop rate is greater than the start rate, and (ii) acquires and stores stress test data in the memory. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A system, comprising:
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a programming unit configured to produce a first signal;
an implantable medical device (IMD) for implantation in a patient, wherein the IMD comprises pacing circuitry configured to selectively produce pacing pulses at a programmable pacing rate for delivery to muscle tissue of a heart of the patient; and
wherein the IMD is adapted to receive the first signal from the programming unit and configured to subject the patient to a stress test dependent upon the first signal, and wherein during the stress test;
(i) the pacing rate is increased from a start rate to a stop rate, wherein the stop rate is greater than the start rate, and (ii) stress test data is acquired and stored within the IMD. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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58. An implantable medical device (IMD) for implantation in a patient, comprising:
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pacing circuitry configured to selectively produce pacing pulses at a programmable pacing rate for delivery to muscle tissue of a heart of the patient;
sensor circuitry configured to receive a signal from at least one sensor and to produce sensor data dependent upon the signal, wherein the sensor data comprises data indicative of an operational state of the heart of the patient;
a memory for storing data; and
a control unit coupled to the pacing circuitry, the sensor circuitry, and the memory, and wherein the control unit is configurable to store the sensor data in the memory until a trigger signal is received, and wherein the trigger signal is generated when the patient suffers from at least one sign of myocardial ischemia. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69)
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70. A method for performing a stress test upon a patient having an implantable medical device (IMD) implanted within, wherein the IMD is adapted to receive information and configurable to subject the patient to a stress test at a time specified by timing information, the method comprising:
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configuring the IMD to subject the patient to the stress test at the time specified by the timing information; and
conveying the timing information to the IMD.
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71. A method for performing a stress test upon a patient having an implantable medical device (IMD) implanted within, wherein the IMD is adapted to receive a signal and configurable to subject the patient to a stress test in response to the signal, the method comprising:
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configuring the IMD to subject the patient to the stress test in response to the received signal; and
generating the signal.
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72. A method for reproducing an operational state of a heart of a patient having an implantable medical device (IMD) implanted within, wherein the IMD is configurable to store sensor data in a memory until a trigger signal is received, and to use the sensor data stored in the memory to reproduce the operational state of the heart of the patient, the method comprising:
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configuring the IMD to store the sensor data in the memory until the trigger signal is received;
generating the trigger signal; and
configuring the IMD to use the sensor data stored in the memory to reproduce the operational state of the heart of the patient.
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73. A method for performing a stress test upon a patient, comprising:
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programming an implantable medical device (IMD) with stress test values, wherein the IMD is implanted in the patient and configured to provide pacing pulses to a heart of the patient; and
signaling the IMD to initiate the stress test. - View Dependent Claims (74, 75, 76, 77)
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78. An implantable medical device (IMD) for implementation in a patient, comprising pacing circuitry configured to selectively produce pacing pulses at a programmable pacing rate for delivery to cardiac tissue of the patient being in operative electrical and data communications with an external device, and wherein the external device is configurable to subject the patient to a stress test, and wherein during the stress test:
- (i) the pacing rate is increased from a start rate to a stop rate, wherein the stop rate is greater than the start rate, and (ii) stress test data is acquired and stored in the external device.
Specification