Defibrillation threshold prediction methods and systems
First Claim
1. A method comprising:
- delivering a first nondefibrillating and nonfibrillation-inducing energy at a first internal thoracic location;
detecting a first resulting electrical signal at a second internal thoracic location in or near a target region of a heart, the first resulting electrical signal providing an indication of a first electric field strength in the target region; and
estimating a defibrillation threshold using the first nondefibrillating and nonfibrillation-inducing energy, the first resulting electrical signal, and a target electric field strength at the target region of the heart.
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Accused Products
Abstract
A nondefibrillating and nonfibrillation-inducing energy is delivered at a first internal thoracic location. A first resulting electrical signal is detected at a second internal thoracic location in or near a target region of a heart. A first defibrillation threshold is estimated using the nondefibrillating and nonfibrillation-inducing energy, the first resulting electrical signal, and a target electric field strength. The defibrillation threshold represents an energy that when delivered at the first internal thoracic location creates an electric field strength in the target region of the heart that meets or exceeds the target electric field strength.
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Citations
41 Claims
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1. A method comprising:
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delivering a first nondefibrillating and nonfibrillation-inducing energy at a first internal thoracic location;
detecting a first resulting electrical signal at a second internal thoracic location in or near a target region of a heart, the first resulting electrical signal providing an indication of a first electric field strength in the target region; and
estimating a defibrillation threshold using the first nondefibrillating and nonfibrillation-inducing energy, the first resulting electrical signal, and a target electric field strength at the target region of the heart. - 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 method comprising:
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delivering a first nondefibrillating and nonfibrillation-inducing energy at a first internal thoracic location;
detecting a first resulting electrical signal at a second internal thoracic location in or near a target region of a heart, the first resulting electrical signal providing an indication of a first electrical field strength in the target region; and
estimating a first defibrillation threshold using the first nondefibrillating and nonfibrillation-inducing energy, the first resulting electrical signal, and a target electric field strength;
delivering a second nondefibrillating and nonfibrillation-inducing energy at the first internal thoracic location;
detecting a second resulting electrical signal at the second internal thoracic location, the second resulting electrical signal providing an indication of a second electric field strength in the target region of the heart during delivery of the second nondefibrillating and nonfibrillation-inducing energy;
determining a change in a defibrillation threshold using the first resulting electrical signal and the second resulting electrical signal. - View Dependent Claims (19, 20, 21, 22)
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23. A method comprising:
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delivering a first nondefibrillating and nonfibrillation-inducing energy to a thorax using a first defibrillation configuration;
detecting a first resulting electrical signal at a internal thoracic location in or near a target region of a heart, the first resulting electrical signal providing an indication of a first electric field strength in the target region;
delivering a second nondefibrillating and nonfibrillation-inducing energy to the thorax using a second defibrillation configuration;
detecting a second resulting electrical signal at the internal thoracic location, the second resulting electrical signal providing an indication of a second electric field strength in the target region of the heart during delivery of the nondefibrillating and nonfibrillation-inducing energy using the second defibrillation configuration;
estimating at least one defibrillation threshold using at least one target electric field strength and at least one of the first and second resulting electrical signals. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A system comprising:
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an energy module adapted to deliver a nondefibrillating and nonfibrillation-inducing energy using at least a first electrode at a first internal thoracic location;
a response signal module adapted to detect a resulting signal using at least a second electrode at a second internal thoracic location in or near a target region of a heart, the responsive signal resulting from the delivery of the energy and providing an indication of an electric field strength at the second internal thoracic location; and
a controller communicatively coupled to the energy module and the response signal module, the controller adapted to estimate a defibrillation threshold using the nondefibrillating and nonfibrillation-inducing energy and the resulting signal. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification