Mechanism for detecting coronary ischemia
OwnerClayton A. Kaiser, Daniel W. Kaiserinventors
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Abstract
A system for detecting myocardial ischemia includes an implantable device having one or more leads connected thereto, at least one electrode on a lead of the device, and a microprocessor in the implantable device. The electrode is configured to stimulate the heart. The at least one sensor is configured to measure a characteristic of blood in a coronary vessel. The microprocessor is programmed to: run a stress test on the heart by stimulating the heart with the electrode; record data obtained from the at least one sensor during the stress test; and determine whether there is myocardial ischemia based upon the recorded data.
Claims15
A system for detecting myocardial ischemia comprising:
- an implantable device having one or more leads connected thereto;
- at least one electrode on a lead of the device, the electrode configured to stimulate the heart;
- at least two oximetry sensors on one or more leads of the device, the at least two oximetry sensors configured to measure oxygen saturation in a coronary sinus;
- and
- a microprocessor in the implantable device programmed to:
- run a stress test on the heart by stimulating the heart with the electrode;
- record data obtained from the at least two oximetry sensors during the stress test;
- determine whether there is myocardial ischemia based upon the recorded data;
- and
- determine a location of the myocardial ischemia based upon a difference in the oxygen saturation measured at the at least two oximetry sensors.
A method of detecting myocardial ischemia comprising:
- measuring oxygen saturation of blood in a coronary sinus with at least two oximetry sensors on one or more leads of an implantable device;
- recording data obtained from the sensor in a memory of the implantable device to establish a baseline;
- performing a stress test with the implantable device;
- measuring the oxygen saturation with the sensors during the stress test;
- comparing the oxygen saturation measured during the stress test with the baseline to detect whether there is myocardial ischemia;
- and
- determining a location of the myocardial ischemia based upon a difference in the oxygen saturation measured at the at least two oximetry sensors.
Dependencies are inferred from the claim text.