Patent ID: 8929982
Filing Date: 2015-01-06
Classification: A61B,A61N

Abstract:
1. An implantable medical device comprising: an implantable oxygen sensor configured to generate a sensor signal representative of oxygen concentration in coronary sinus blood of a heart; memory to store a normal oxygen concentration threshold of blood in the coronary sinus; and an ischemia detector coupled to said oxygen sensor and configured to process said sensor signal received from said implantable oxygen sensor, wherein said ischemia detector is configured to determine if an ischemic event occurs in said heart if said sensor signal indicates a temporary decrease in oxygen concentration in said coronary sinus blood below the normal oxygen concentration threshold in coronary sinus blood for a non-ischemic status of said heart followed by temporary increase in oxygen concentration in said coronary sinus blood above the normal oxygen concentration in the coronary sinus blood for a non-ischemic status of said heart, further followed by an oxygen concentration in the coronary sinus blood that is substantially equal to said normal oxygen concentration threshold.