Peter Boileau,Xiaoyi Min,Jong Gill,Rupinder Bharmi,Joseph J. Florio,Michael E. Benser,Gene A. Bornzin
申请号：
US12016166
公开号：
US08265739B1
申请日:
2008.01.17
申请国别(地区):
US
年份:
2012
代理人:
摘要：
Techniques are provided for use in a pacemaker or implantable cardioverter/defibrillator (ICD) for distinguishing cardiac ischemia from other conditions affecting the morphology of electrical cardiac signals sensed within a patient, such as hypoglycemia, hyperglycemia or other systemic conditions. In one example, the device detects changes in morphological features of cardiac signals indicative of possible cardiac ischemia within the patient, such as changes in ST segment elevation within an intracardiac electrogram (IEGM). The device determines whether the changes in the morphological features are the result of spatially localized changes within a portion of the heart and then distinguishes cardiac ischemia from other conditions affecting the morphology of electrical cardiac signals based on that determination. In another example, the device exploits the interval between the peak of a T-wave (Tmax) and the end of the T-wave (Tend). A significant increase in the Tend−Tmax interval is indicative of ischemia rather than a systemic condition.
