Method and apparatus for safety control during cardiac pacing mode transition
First Claim
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1. A cardiac rhythm management system for pacing a heart in a living body, the system comprising:
- a pacing output circuit adapted to deliver pacing pulses; and
a pacing control circuit coupled to the pacing output circuit and adapted to control the delivery of the pacing pulses using a plurality of pacing parameters according to a current pacing mode of a plurality of pacing modes, the pacing control circuit including;
a memory circuit storing one or more pacing algorithms each specifying one or more pacing modes of the plurality of pacing modes and a transitional period during which the current pacing mode changes from a first pacing mode of the plurality of pacing modes to a second pacing mode of the plurality of pacing modes, the one or more pacing algorithms executable by the pacing control circuit, the transitional period specified as a time interval or a number of heart beats;
a transition timer programmed to initiate and time the stored transitional period; and
a transitional parameter adjuster adapted to incrementally adjust at least one transitional pacing parameter of the plurality of pacing parameters from a first value to a second value over the transitional period, the first value associated with the first pacing mode, the second value associated with the second pacing mode and substantially different from the first value.
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Abstract
A cardiac pacing system introduces a transitional period when pacing mode changes, such as when pacing starts and stops, or when one or more pacing parameter values change substantially. For each pacing parameter that changes substantially when the pacing mode changes, its value is adjusted incrementally over the transitional period to protect the heart from potentially harmful conditions associated with an abrupt change in the value of that pacing parameter.
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Citations
22 Claims
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1. A cardiac rhythm management system for pacing a heart in a living body, the system comprising:
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a pacing output circuit adapted to deliver pacing pulses; and a pacing control circuit coupled to the pacing output circuit and adapted to control the delivery of the pacing pulses using a plurality of pacing parameters according to a current pacing mode of a plurality of pacing modes, the pacing control circuit including; a memory circuit storing one or more pacing algorithms each specifying one or more pacing modes of the plurality of pacing modes and a transitional period during which the current pacing mode changes from a first pacing mode of the plurality of pacing modes to a second pacing mode of the plurality of pacing modes, the one or more pacing algorithms executable by the pacing control circuit, the transitional period specified as a time interval or a number of heart beats; a transition timer programmed to initiate and time the stored transitional period; and a transitional parameter adjuster adapted to incrementally adjust at least one transitional pacing parameter of the plurality of pacing parameters from a first value to a second value over the transitional period, the first value associated with the first pacing mode, the second value associated with the second pacing mode and substantially different from the first value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for operating a cardiac rhythm management system, the method comprising:
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storing a transitional period specified as a time interval or a number of heart beats; delivering pacing pulses to a heart; controlling the delivery of the pacing pulses using a plurality of pacing parameters according to a current pacing mode of a plurality of pacing modes; initiating and timing the stored transitional period during which the current pacing mode changes from a first pacing mode of the plurality of pacing modes to a second pacing mode of the plurality of pacing modes; and adjusting at least one transitional pacing parameter of the plurality of pacing parameters from a first value to a second value incrementally over the transitional period, the first value associated with the first pacing mode, the second value associated with the second pacing mode and substantially different from the first value. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification