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US 2008/0288013 A1Published application
Pulmonary pressure monitoring
AssigneePacesetter, Inc.
InventorStuart O. Schecter
Life of this patent
Estimating the term…
Abstract
Devices, methods, and systems for determining a systolic pulmonary artery pressure index (PAPi) corresponding to pulmonary artery pressure (PAP) and/or right ventricular systolic pressure (RVSP) use lead-based electronic sensors detecting right heart valvular events. Suitable sensors include impedance sensors, accelerometers, cardiomechanical electric sensors, and sonomicrometers.
Claims20
An implantable cardiac stimulation device comprising:
- at least one lead adapted to be implanted within the right ventricle of the heart, wherein the at least one lead is adapted to provide therapeutic stimulation to the heart of the patient;
- at least one valve sensor wherein the sensor is adapted to be implanted within a chamber of the heart wherein the at least one sensor is further adapted to sense valvular events within the right ventricle of the heart and provide valvular event signals indicative thereof;
- a controller that induces the delivery of therapeutic stimulation to the heart of the patient via the at least one lead and receives the valvular event signals from the at least one valve sensor, wherein the controller uses the valvular event signals to periodically determine a time parameter at least partially representative of the time period between the closing of the pulmonary valve and the opening of the tricuspid valve of the right ventricle of the heart and wherein the controller assess whether the periodically determined time parameter is indicative of increasing pulmonary artery pressure.
A method for determining a pulmonary artery pressure index comprising:
- positioning a lead comprising a sensor system at a right ventricle;
- acquiring with the sensor system data encoding right heart valvular timing, wherein the data does not comprise direct pressure measurement;
- extracting from the data encoding right heart valvular timing a pulmonary valve closure and a tricuspid valve opening;
- determining an isovolumetric relaxation time from the pulmonary valve closure and the tricuspid valve opening;
- and
- calculating a pulmonary artery pressure index from the isovolumetric relaxation time.
3 more elements
A device for measuring a pulmonary artery pressure index comprising:
- an implantable lead comprising a sensor system operable to detect right-heart valvular timing and output a corresponding signal, wherein the sensor system does not comprise an electrical sensor or a direct pressure measuring sensor;
- and
- an implantable controller system coupled to the sensor system operable to convert the signal from the sensor system into a pulmonary artery pressure.
Dependencies are inferred from the claim text.