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.