Ventricular geometric and hemodynamic control by heart rate modulation in LVAD therapy
AssigneeMedtronic, Inc.
InventorTroy Jackson
Life of this patent
Estimating the term…
Abstract
A method of operating an implantable blood pump and a pacing device, the method includes determining an end diastolic volume (EDV) and ejection fraction of one from the group consisting of the right ventricle and the left ventricle at a predetermined pump set speed. An average flow rate based on the predetermined pump set speed is determined. A target heart rate based at least in part on the determined EDV, ejection fraction, and average flow rate is determined. A lower rate for the pacing device is determined, the pacing device being in electrical communication with a chamber of the heart. The chamber of the heart is paced when a measured heart rate drops below the lower rate.
Claims19
A method of operating a blood pump and a pacing device, the method comprising:
- determining an end diastolic volume (EDV) and an ejection fraction of a ventricle of a heart of a patient at a pump set speed of the blood pump;
- determining an average flow rate based on the pump set speed;
- determining a lower rate for the pacing device based at least in part on the EDV, the ejection fraction, and the average flow rate, the pacing device being in electrical communication with a chamber of the heart;
- and
- pacing the chamber of the heart when a measured heart rate drops below the lower rate.
A cardiac rhythm and blood flow management system, comprising:
- a blood pump configured to operate at a pump set speed;
- and
- a pacing device in communication with the blood pump, wherein the pacing device is configured to deliver therapy to a heart of a patient;
- and
- processing circuitry configured to:
- determine a flow rate based on the pump set speed, and
- determine a lower rate for the pacing device based at least in part on the flow rate, wherein the pacing device is configured to deliver the therapy to the heart when a measured heart rate of the patient drops below the lower rate.
A system comprising:
- a pacing device configured to deliver therapy to a heart of a patient;
- and
- processing circuitry configured to:
- determine an end diastolic volume (EDV) and an ejection fraction of a ventricle of the heart at a pump set speed of a blood pump of the patient,
- determine an average flow rate of blood exiting the blood pump, and
- determine a lower rate for the pacing device based at least in part on the EDV, the ejection fraction, and the average flow rate.
Dependencies are inferred from the claim text.