Patent ID: 8864677
Filing Date: 2014-10-21
Classification: A61B,A61N

Abstract:
1. An implantable medical device comprising: control circuitry; an electrical field sensor in communication with the control circuitry, the electrical field sensor configured to generate a signal corresponding to cardiac electrical fields; a chemical sensor in communication with the control circuitry, the chemical sensor configured to generate a signal corresponding to the concentration of a physiological analyte that affects cardiac electrical field waveform morphology; and a template bank; the control circuitry configured to monitor for the presence of myocardial ischemia by evaluating both the signal generated by the electrical field sensor and the signal generated by the chemical sensor; the control circuitry configured to generate a cardiac electrical field morphological template including data from the signal corresponding to cardiac electrical fields and chemical concentration data from the signal corresponding to the concentration of potassium and store the cardiac electrical field morphological template in the template bank; wherein the control circuitry stores the cardiac electrical field template as a hypo-level template if the potassium concentration is abnormally high, a normal level template if the potassium concentration is normal, and a hyper-level template if the potassium concentration is abnormally high.