Implantable medical device with valve opening detector
First Claim
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1. An implantable medical device comprising:
- an aortic valve opening detector for detecting opening of the aortic valve of a heart;
said aortic valve opening detector including an impedance measuring unit for measuring an electrical impedance between measurement poles and generating an impedance signal representing said electrical impedance, at least one of said measurement poles being disposed at a location selected from the group consisting of in the coronary sinus and in the great cardiac vein of said heart; and
said aortic valve opening detector further including an impedance signal processor, supplied with said impedance signal, for processing said impedance signal and detecting opening of said aortic valve therefrom.
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Abstract
A valve opening detector for use in an implantable medical device detects opening of at least one valve in the left side of heart, and has an impedance measuring unit for measuring electrical impedance between measuring poles and for generating an impedance signal corresponding thereto, at least one of the poles being arranged in the coronary sinus and/or in the great cardiac vein of the heart. The valve opening detector also includes an impedance signal processor which processes the impedance signal to detect the opening of one or both valves in the left side of the heart.
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Citations
17 Claims
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1. An implantable medical device comprising:
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an aortic valve opening detector for detecting opening of the aortic valve of a heart; said aortic valve opening detector including an impedance measuring unit for measuring an electrical impedance between measurement poles and generating an impedance signal representing said electrical impedance, at least one of said measurement poles being disposed at a location selected from the group consisting of in the coronary sinus and in the great cardiac vein of said heart; and said aortic valve opening detector further including an impedance signal processor, supplied with said impedance signal, for processing said impedance signal and detecting opening of said aortic valve therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An implantable medical device comprising:
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a mitral valve opening detector for detecting opening of the mitral valve of a heart; said mitral valve opening detector including an impedance measuring unit for measuring an electrical impedance between measurement poles and generating an impedance signal representing said electrical impedance, at least one of said measurement poles being disposed at a location selected from the group consisting of in the coronary sinus and in the great cardiac vein of said heart; and said mitral valve opening detector further including an impedance signal processor, supplied with said impedance signal, for processing said impedance signal by filtering said impedance signal with a filter having bandpass filter characteristics with a band range of between 2 Hz and 16 Hz to detect opening of said mitral valve therefrom. - View Dependent Claims (10, 11)
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12. An implantable heart stimulator comprising:
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an aortic valve opening detector for detecting opening of the aortic valve of a heart; said aortic valve opening detector including an impedance measuring unit for measuring an electrical impedance between measurement poles and generating an impedance signal representing said electrical impedance, at least one of said measurement poles being disposed at a location selected from the group consisting of in the coronary sinus and in the great cardiac vein of said heart; said aortic valve opening detector further including an impedance signal processor, supplied with said impedance signal, for processing said impedance signal and detecting opening of said aortic valve therefrom; a stimulation pulse generator for emitting stimulation pulses; an electrode lead connected to said stimulation pulse generator and adapted for connection to said heart for delivering said stimulation pulses to said heart; and a control unit connected to said stimulation pulse generator and to said aortic valve opening detector for controlling generation of said stimulation pulses by said stimulation pulse generator dependent on said opening of said aortic valve detected by said aortic valve opening detector. - View Dependent Claims (13, 14)
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15. An implantable heart stimulator comprising:
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a mitral valve opening detector for detecting opening of the micro valve of a heart; said mitral valve opening detector including an impedance measuring unit for measuring an electrical impedance between measurement poles and generating an impedance signal representing said electrical impedance, at least one of said measurement poles being disposed at a location selected from the group consisting of in the coronary sinus and in the great cardiac vein of said heart; said mitral valve opening detector further including an impedance signal processor, supplied with said impedance signal, for processing said impedance signal by filtering said impedance signal with a filter having bandpass filter characteristics with a band range of between 2 Hz and 16 Hz to detect opening of said mitral valve therefrom; a stimulation pulse generator for emitting stimulation pulses; an electrode lead connected to said stimulation pulse generator and adapted for connection to said heart for delivering said stimulation pulses to said heart; and a control unit connected to said stimulation pulse generator and to said mitral valve opening detector for controlling generation of said stimulation pulses by said stimulation pulse generator dependent on said opening of said mitral valve detected by said mitral valve opening detector. - View Dependent Claims (16, 17)
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Specification