US 2003/0158492 A1 · Ischemia detection

Abstract

Techniques for detection and treatment of myocardial ischemia are described that monitor both the electrical and dynamic mechanical activity of the heart to detect and verify the occurrence of myocardial ischemia in a more reliable manner. The occurrence of myocardial ischemia can be detected by monitoring changes in an electrical signal such as an ECG or EGM, and changes in dynamic mechanical activity of the heart that are sensed by an accelerometer sensor. The heart acceleration signal can be obtained from an single- or multiple-axis accelerometer and/or a pressure sensor deployed within or near the heart. The techniques correlate contractility changes detected by an accelerometer or pressure sensor with changes in the ST electrogram segment detected by the electrodes to increase the reliability of ischemia detection.

Claims25

Dependent claims

A method for detecting myocardial ischemia, the method characterized by:

obtaining a first signal indicative of dynamic mechanical activity of a heart;
obtaining a second signal indicative of electrical activity of the heart;
and
detecting a myocardial ischemia condition based on both the first signal and the second signal.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/304,112Filed 25 Nov 2002

Priority

3 Dec 2001

Published

21 Aug 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

A61N 1/368
Controlled by a physiological parameter, e.g. heart potential: comprising more than one electrode co-operating with different heart regions
A61N 1/3627
Heart stimulators: for treating a mechanical deficiency of the heart, e.g. congestive heart failure or cardiomyopathy
A61N 1/36585
Controlled by a physiological parameter, e.g. heart potential: controlled by two or more physical parameters
A61N
Electrotherapy

Ischemia detection

Life of this patent

Ischemia detection

Life of this patent

Abstract

Claims25