Method of estimating heart rate and detecting tachyarrhythmia
AssigneeMedtronic, Inc.
InventorRobert W. Stadler
Life of this patent
Estimating the term…
Abstract
A method of estimating a heart rate of a patient having an implantable blood pump including, during operation of the blood pump continuously detecting a plurality of cardiac cycles, each of the plurality of cardiac cycles including a length; sorting the plurality of cardiac cycles according to the length; filtering the plurality of cardiac cycles between one of a group consisting of including a reliable condition and at least one unreliable condition; continuously estimating a heart rate according to the length of the plurality of cardiac cycles and the reliable condition; and if the at least one unreliable condition is detected, modifying the estimated heart rate based on information associated with the detected at least one unreliable condition.
Claims9
A method of estimating a heart rate of a patient having an implantable blood pump comprising:
- during operation of the blood pump:
- continuously detecting a plurality of cardiac cycles, each of the plurality of cardiac cycles including a length;
- sorting the plurality of cardiac cycles according to the length;
- filtering the plurality of cardiac cycles between one of a group consisting of including a reliable condition and at least one unreliable condition;
- continuously estimating a heart rate according to the length of the plurality of cardiac cycles and the reliable condition;
- calculating a pulsatility of the estimated heart rate over a predetermined time interval;
- comparing the calculated pulsatility to a predetermined threshold;
- determining whether the at least one condition includes low pulsatility based on the comparison of the calculated pulsatility and the predetermined threshold;
- and
- if the at least one unreliable condition is detected, modifying the estimated heart rate based on the detected at least one unreliable condition.
A system of estimating a heart rate of a patient comprising:
- an implantable blood pump;
- a controller in communication with the implantable blood pump and including a processor, the processor being configured to:
- during operation of the blood pump:
- continuously detect a plurality of cardiac cycles, each of the plurality of cardiac cycles including a length;
- sort the plurality of cardiac cycles according to the length;
- filter the plurality of cardiac cycles between one of a group consisting of including a reliable condition and at least one unreliable condition;
- continuously estimate a heart rate according to the length of the plurality of cardiac cycles and the reliable condition;
- calculating a pulsatility of the estimated heart rate over a predetermined time interval;
- comparing the calculated pulsatility to a predetermined threshold;
- determining whether the at least one condition includes low pulsatility based on the comparison of the calculated pulsatility and the predetermined threshold;
- and
- if the at least one unreliable condition is detected, modify the estimated heart rate based on information associated with the detected at least one unreliable condition.
Dependencies are inferred from the claim text.