Method and apparatus for selection and use of virtual sensing vectors
First Claim
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1. A method performed by a medical device, comprising:
- receiving at least two physical cardiac electrical signals from a patient'"'"'s heart via a plurality of electrodes that define at least two physical sensing vectors;
computing a plurality of virtual cardiac electrical signals using the at least two physical cardiac electrical signals during a first, known cardiac rhythm, each of the plurality of virtual cardiac electrical signals corresponding to one of a plurality of virtual sensing vectors extending at a respective one of a plurality of angles relative to one of the at least two physical sensing vectors, wherein computing the plurality of virtual cardiac electrical signals comprises calculating a projection of the at least two physical cardiac electrical signals along each of the plurality of virtual sensing vectors;
determining, for each of the plurality of virtual cardiac electrical signals, a plurality virtual cardiac electrical signal features;
comparing the determined signal features;
establishing criteria for confirming a suspected condition in response to the comparing;
detecting a suspected condition during a second, unknown cardiac rhythm; and
confirming the suspected condition in response to the established criteria being met during the second, unknown cardiac rhythm.
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Abstract
A medical device is configured to receive at least two physical cardiac electrical signals from a patient'"'"'s heart via electrodes defining at least two physical sensing vectors. The medical device determines a signal feature for each of a plurality of virtual sensing vectors extending at a plurality of angles relative to one of the at least two physical sensing vectors during a known cardiac rhythm, compares the determined signal features and establishes criteria for confirming a suspected condition in response to the comparing.
116 Citations
36 Claims
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1. A method performed by a medical device, comprising:
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receiving at least two physical cardiac electrical signals from a patient'"'"'s heart via a plurality of electrodes that define at least two physical sensing vectors; computing a plurality of virtual cardiac electrical signals using the at least two physical cardiac electrical signals during a first, known cardiac rhythm, each of the plurality of virtual cardiac electrical signals corresponding to one of a plurality of virtual sensing vectors extending at a respective one of a plurality of angles relative to one of the at least two physical sensing vectors, wherein computing the plurality of virtual cardiac electrical signals comprises calculating a projection of the at least two physical cardiac electrical signals along each of the plurality of virtual sensing vectors; determining, for each of the plurality of virtual cardiac electrical signals, a plurality virtual cardiac electrical signal features; comparing the determined signal features; establishing criteria for confirming a suspected condition in response to the comparing; detecting a suspected condition during a second, unknown cardiac rhythm; and confirming the suspected condition in response to the established criteria being met during the second, unknown cardiac rhythm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A medical device system, comprising:
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a sensing module configured to receive at least two physical cardiac electrical signals via a plurality of electrodes that define at least two physical sensing vectors; and a control module coupled to the sensing module and configured to; compute a plurality of virtual cardiac electrical signals using the at least two physical cardiac electrical signals during a first, known cardiac rhythm, each of the plurality of virtual cardiac electrical signals corresponding to one of a plurality of virtual sensing vectors extending at a respective one of a plurality of angles relative to one of the at least two physical sensing vectors, wherein computing the plurality of virtual cardiac electrical signals comprises calculating a projection of the at least two physical cardiac electrical signals along each of the plurality of virtual sensing vectors; determine, for each of the plurality of virtual cardiac electrical signals, a plurality of virtual cardiac electrical signal features; comparing the determined signal features; establishing criteria for confirming a suspected condition in response to the comparing; detecting a suspected condition during a second, unknown cardiac rhythm; and confirming the suspected condition in response to the established criteria being met during the second, unknown cardiac rhythm. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A non-transitory, computer-readable storage medium comprising a set of instructions which, when executed by a control module of a medical device, cause the medical device to:
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receive at least two physical cardiac electrical signals from a patient'"'"'s heart via a plurality of electrodes that define at least two physical sensing vectors; compute a plurality of virtual cardiac electrical signals using the at least two physical cardiac electrical signals during a first, known cardiac rhythm, each of the plurality of virtual cardiac electrical signals corresponding to one of a plurality of virtual sensing vectors extending at a respective one of a plurality of angles relative to one of the at least two physical sensing vectors, wherein computing the plurality of virtual cardiac electrical signals comprises calculating a projection of the at least two physical cardiac electrical signals along each of the plurality of virtual sensing vectors; determine, for each of the plurality of virtual cardiac electrical signals, one or more virtual cardiac electrical signal features; compare the determined signal features; establish criteria for confirming a suspected condition in response to the comparing; detect a suspected condition during a second, unknown cardiac rhythm; and confirm the suspected condition in response to the established criteria being met during the second, unknown cardiac rhythm.
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Specification