Systems and methods for use by implantable medical devices for detecting and discriminating stroke and cardiac ischemia using electrocardiac signals
US8989852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2011 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Dec 28, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0295
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Techniques are provided for detecting and distinguishing stroke and cardiac ischemia based on electrocardiac signals. In one example, the device senses atrial and ventricular signals within the patient along a set of unipolar sensing vectors and identifies certain morphological features within the signals such as PR intervals, ST intervals, QT intervals, T-waves, etc. The device detects changes, if any, within the morphological features such as significant shifts in ST interval elevation or an inversion in T-wave shape, which are indicative of stroke or cardiac ischemia. By selectively comparing changes detected along different unipolar sensing vectors, the device distinguishes or discriminates stroke from cardiac ischemia within the patient. The discrimination may be corroborated using various physiological and hemodynamic parameters. In some examples, the device further identifies the location of the ischemia within the heart. In still other examples, the device detects cardiac ischemia occurring during stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.