Implantable ischemia detector and implantable stimulator employing same
First Claim
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1. An ischemia detector comprising:
- repolarization sensing means for measuring a magnitude of a characteristic portion of a T-wave of a heart of a patient and for generating a first signal indicative of said magnitude;
workload sensing means for sensing a workload of a patient and for generating a second signal indicative of sensed workload; and
detecting means, supplied with said first and second signals, for identifying a state of ischemia upon an occurrence of a predetermined relation between the magnitude and the sensed workload.
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Abstract
An ischemia detector includes repolarization sensor which senses repolarization of the heart of a patient and delivers corresponding repolarization signals to a detecting unit and a workload sensor which senses the workload of the patient and delivers corresponding workload signals to the detecting unit. The detecting unit identifies a state of ischemia as existing upon the occurrence of a predetermined relation between sensed repolarization and sensed workload.
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Citations
19 Claims
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1. An ischemia detector comprising:
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repolarization sensing means for measuring a magnitude of a characteristic portion of a T-wave of a heart of a patient and for generating a first signal indicative of said magnitude; workload sensing means for sensing a workload of a patient and for generating a second signal indicative of sensed workload; and detecting means, supplied with said first and second signals, for identifying a state of ischemia upon an occurrence of a predetermined relation between the magnitude and the sensed workload. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An ischemia detector comprising:
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repolarization sensing means for measuring an amplitude of a T-wave of a heart of a patient and for generating a first signal indicative of said amplitude; workload sensing means for sensing a workload of a patient and for generating a second signal indicative of sensed workload; and detecting means, supplied with said first and second signals, for identifying a state of ischemia upon an occurrence of a predetermined relation between the amplitude and the sensed workload. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An ischemia detector comprising:
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repolarization sensing means for sensing repolarization of a heart of a patient in a predetermined number of cardiac cycles, and in each of said cardiac cycles generating a first signal indicative of sensed repolarization, thereby producing a plurality of first signals; workload sensing means for sensing a workload of a patient and for generating a second signal indicative of sensed workload; an averaging unit supplied with said plurality of first signals, which forms an average repolarization signal as an average of said plurality of first signals; and detecting means, supplied with said average repolarization signal and said second signal, for identifying a state of ischemia upon an occurrence of a predetermined relation between said average repolarization signal and the sensed workload. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification