US 2012/0059272 A1 · MEDICAL DEVICE AND METHOD FOR DETERMINING A DYSSYNCHRONICITY MEASURE TECHNICAL FIELD

Abstract

In an implantable medical device, such as a bi-ventricular pacemaker and a method for detecting and monitoring mechanical dyssynchronicity of the heart, a dyssynchronicity measure indicating a degree of mechanical dyssynchronicity of a heart of a patient is calculated. A first intracardiac impedance set is measured using electrodes placed such that the first intracardiac impedance set substantially reflects a mechanical activity of the left side of the heart and a second intracardiac impedance set is measure using electrodes placed such that the second intracardiac impedance set substantially reflects a mechanical activity of the right side of the heart. The measure of a dyssynchronicity is calculated based on a resulting parameter set from a comparison between at least a subset of the first and the second impedance sets, respectively, the subsets containing information of the mechanical systole, wherein a reduced dyssynchronicity measure corresponds to an improved synchronicity between the right side and the left side of the heart.

Claims18

Dependent claims

A medical device for determining a dyssynchronicity measure indicating a degree of mechanical dyssynchronicity of a heart of a patient, said medical device being connectable to at least two medical leads each including electrodes adapted to be positioned within or at said heart, said medical device comprising:

an impedance measuring unit configured to measure:
a first intracardiac impedance set over at least one cardiac cycle using a first electrode vector/array including at least two electrodes placed such that said first intracardiac impedance set substantially reflects a mechanical activity of said left side of the heart;
and
a second intracardiac impedance set over at least one cardiac cycle using a second electrode vector/array including at least two electrodes placed such that said second intracardiac impedance set substantially reflects a mechanical activity of said right side of the heart;
and
a calculating module configured to calculate a measure of a dyssynchronicity based on a resulting parameter from a comparison between at least a subset of said first and said second impedance sets, respectively, said subsets containing information of the mechanical systole.

3 more elements

A method for determining a dyssynchronicity measure in a medical device, said dyssynchronicity measure indicating a degree of mechanical dyssynchronicity of a heart of a patient, said medical device being connectable to at least two medical leads each including electrodes adapted to be positioned within or at said heart, said method comprising:

measuring a first intracardiac impedance set over at least one cardiac cycle using a first electrode vector/array including at least two electrodes placed such that said first intracardiac set substantially reflects a mechanical activity of said left side of the heart;
measuring a second intracardiac impedance set over at least one cardiac cycle using a second electrode vector/array including at least two electrodes placed such that said second intracardiac impedance set substantially reflects a mechanical activity of said right side of the heart;
and
calculating a measure of a dyssynchronicity based on a resulting parameter set from a comparison between at least a subset of said first and said second impedance sets, respectively, said subsets containing information of the mechanical systole.

1 more element

Dependencies are inferred from the claim text.

Medical device and method for determining a dyssynchronicity measure technical field

Life of this patent

Medical device and method for determining a dyssynchronicity measure technical field

Life of this patent

Abstract

Claims18