US 10,299,688 B2 · Multi-vector sensing in cardiac devices with signal combinations

Abstract

Methods and devices for combining multiple signals from multiple sensing vectors for use in wearable or implantable cardiac devices. Signals from multiple vectors may be combined using weighting factors and/or by conversion to different coordinate systems than the original inputs, which may or may not be normalized to patient anatomy. Signals from multiple sensing vectors may be combined prior to or after several analytical steps or processes including before or after filtering, and before or after cardiac cycle detection. Cardiac cycle detection information may be combined across multiple sensing vectors before or after analysis of individual vectors for noise or overdetection. Cardiac cycle detection information may also be combined across multiple sensing vectors to identify noise and/or overdetection.

Claims19

Dependent claims

A cardiac rhythm management device having operational circuitry for analyzing cardiac signals using a least first and second cardiac sensing vectors and first and second sensing channels, wherein the operational circuitry is configured to:

calculate at least first and second weighting factors for the at least first and second sensing vectors;
apply the first weighting factor to modify signals sensed with the first sensing vector;
apply the second weighting factor to modify signals sensed with the second sensing vector;
produce a combined signal by combining the signals from the first and second sensing vectors together, as modified by the weighting factors;
compare the combined signal to a time-changing detection threshold to detect cardiac cycles;
calculate a rate based on the detected cardiac cycles;
determine whether a treatable cardiac state is occurring based on the rate;
deliver cardiac electrical therapy if it is determined that the treatable cardiac state is occurring;
and
on a triggered or continuous basis, recalculate the weighting factors.

7 more elements

Dependencies are inferred from the claim text.

Multi-vector sensing in cardiac devices with signal combinations

Life of this patent

Multi-vector sensing in cardiac devices with signal combinations

Life of this patent

Abstract

Claims19