Capture threshold estimation for alternate pacing vectors
AssigneeCardiac Pacemakers, Inc.
InventorsAlok S. Sathaye, Jason M. Brooke
Life of this patent
Estimating the term…
Abstract
Approaches for estimating capture thresholds for alternate pacing vectors of multi-electrode pacing devices are described. Capture thresholds of at least one initial pacing vector is measured. The impedance of the initial pacing vector and at least one alternate pacing vector is measured. The initial and alternate pacing vectors have an electrode in common. The common electrode has the same polarity in both the initial and the alternate pacing vectors. The capture threshold for the alternate pacing vector may be estimated based on the measured capture threshold of the initial pacing vector, the measured the impedance of the initial pacing vector, and the measured impedance of the alternate pacing vector.
Claims30
A method for estimating capture thresholds for one or more alternate pacing vectors of an implantable cardiac device, comprising:
- measuring a capture threshold of at least one initial vector;
- measuring an impedance of the at least one initial pacing vector;
- measuring an impedance of at least one alternate vector, the at least one initial vector and the at least one alternate vector having an electrode in common, the common electrode having the same polarity for both the initial and alternate vectors;
- and
- estimating a capture threshold for the at least one alternate vector based on the measured capture threshold of the at least one initial vector, the measured impedance of the at least one initial vector, and the measured impedance of the at least one alternate vector.
A cardiac rhythm management system, comprising:
- electrodes electrically coupled to the heart, each pair of electrodes forming an initial vector or an alternate vector;
- capture threshold measurement circuitry configured to measure a capture threshold of at least one initial vector;
- impedance measurement circuitry configured to measure an impedance of the at least one initial vector and an impedance of at least one alternate vector, the at least one initial vector and the at least one alternate vector having an electrode in common, the common electrode having the same polarity in both the initial and alternate vectors;
- and
- a capture threshold estimation processor configured to estimate a capture threshold for the at least one alternate vector based on the measured capture threshold of the initial vector, the measured impedance of the initial vector, and the measured impedance of the alternate vector.
A system for estimating capture thresholds for one or more alternate vectors, comprising:
- capture threshold measurement circuitry configured to measure a capture threshold of at least one initial vector;
- impedance measurement circuitry configured to measure an impedance associated with the initial vector and an impedance associated with at least one alternate vector;
- and
- means for estimating a capture threshold for the at least one alternate vector based on the measured capture threshold of the at least one initial vector, the measured the impedance of the at least one initial vector, and the measured impedance of the at least one alternate vector.
Dependencies are inferred from the claim text.