Method and apparatus for measuring left ventricular pressure
First Claim
1. A body implantable system, comprising:
- a lead system comprising an open lumen, at least one electrode, and an occlusion device at a distal end of the lead system;
a sensing catheter movably disposed within the open lumen of the lead system, a distal tip of the sensing catheter extendable beyond a distal tip of the lead system, the sensing catheter comprising at least one pressure transducer at a distal end of the sensing catheter; and
a detection/energy delivery system coupled to the lead system, the detection/energy delivery system sensing ventricular rhythms from the at least one electrode, sensing hydrostatic pressure from the at least one pressure transducer, and delivering an electrical signal to the at least one electrode.
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Accused Products
Abstract
A body implantable system employs a lead system having at least one electrode and at least one pressure transducer at a distal end. The lead system is implanted within a patient'"'"'s heart in a coronary vein of the left ventricle. The lead system includes an occlusion device at a distal end to occlude flow in the coronary vein. The pressure transducer is attached to a catheter that is disposed within an open lumen of the lead system. The pressure transducer senses a coronary vein pressure, the coronary vein pressure being proportional to the left ventricular pressure. The sensed coronary vein pressure gives indications of hemodynamic state of the left ventricle, and measured coronary vein pressure can be used to change a signal sent to the electrode to adaptively pace the patient'"'"'s heart. The body implantable system can further utilize a right ventricular pressure measurement in concert with the left ventricular pressure measurement to modify pacing therapy parameters.
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Citations
36 Claims
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1. A body implantable system, comprising:
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a lead system comprising an open lumen, at least one electrode, and an occlusion device at a distal end of the lead system;
a sensing catheter movably disposed within the open lumen of the lead system, a distal tip of the sensing catheter extendable beyond a distal tip of the lead system, the sensing catheter comprising at least one pressure transducer at a distal end of the sensing catheter; and
a detection/energy delivery system coupled to the lead system, the detection/energy delivery system sensing ventricular rhythms from the at least one electrode, sensing hydrostatic pressure from the at least one pressure transducer, and delivering an electrical signal to the at least one electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of pacing a patient'"'"'s heart, comprising:
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providing a lead system disposed within a coronary vein of the patient'"'"'s heart, the lead system comprising;
an open lumen;
at least one electrode; and
an occlusion device at a distal end of the lead system;
introducing a sensing catheter within the open lumen of the lead system until a distal tip of the sensing catheter extends beyond a distal tip of the lead system, the sensing catheter comprising at least one pressure transducer at a distal end of the sensing catheter;
measuring ventricular electrical rhythms from the at least one electrode to deliver a synchronized electrical signal to the at least one electrode; and
measuring, while occluding blood flow in the vein using the occlusion device, a coronary vein pressure from the pressure transducer to adaptively modify the synchronized electrical signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of pacing a patient'"'"'s heart, comprising:
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implanting a first lead system into a coronary vein of the patient'"'"'s heart and a second lead system into a chamber of the patient'"'"'s heart, the first and second lead systems each comprising;
at least one electrode; and
at least one pressure transducer at a distal end of the lead system;
measuring ventricular electrical rhythms from the respective electrodes of the first and second lead systems to deliver synchronized electrical signals to the respective electrodes of the first and second lead systems; and
measuring a coronary vein pressure from the at least one pressure transducer of the first lead system and measuring a heart chamber pressure from the at least one pressure transducer of the second lead system to adaptively modify the synchronized electrical signals. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification