Intramyocardial Wenckebach activity detector
September 27, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3587562 Medical instrument for noninvasive measurement of cardiovascular characteristics Method and apparatus for assessing myocardial electrical stability Cardiac and pulmonary physiological analysis via intracardiac measurements with a single sensor Apparatus and method for detecting and processing impedance rheogram Non-invasive dynamic tracking of cardiac vulnerability by analysis of T-wave alternans Cardiac analyzer with REM sleep detection Electrocardiographic method and device Methods and means for non-invasive, dynamic tracking of cardiac vulnerability by simultaneous analysis of heart rate variability and T-wave alternans Method and system for near real-time analysis and display of electrocardiographic signals InventorApplicationNo. 722351 filed on 09/27/1996US Classes:600/515, Detecting arrhythmia128/901, SUPPRESSION OF NOISE IN ELECTRIC SIGNAL600/513Detecting heartbeat electric signal and diverse cardiovascular characteristicExaminersPrimary: Kamm, William E.Assistant: Schaetzle, Kennedy J. Attorney, Agent or FirmInternational ClassA61B 005/040.2AbstractAn intramyocardial activity detector for detecting repeating patterns of irregular intramyocardial Wenckebach activity in the heart of a patient is provided. The apparatus includes a mechanism measuring electrocardiogram (ECG) signals from the body, a mechanism for measuring respiratory signals from the body, and a processor electrically associated with the two mechanisms means for measuring to determine the presence of intramyocardial Wenckebach activity of two or more phases. The processor calculates Wenckebach basis function strengths that indicate the presence of voltage in the measured ECG signals caused by repeating patterns of irregular intramyocardial Wenckebach activity via a relationship that describes the measured ECG signals as comprising Wenckebach input being additive to respiratory interference. In this relationship a nonsingular Wenckebach matrix W representing Wenckebach basis functions reflecting Wenckebach phases and a nonsingular interference matrix R act on the ECG signals to extract the Wenckebach input. The nonsingular interference matrix R based on the respiratory signals and the ECG signals of the patient represents how the measured ECG signals are related to the phases of the respiration. The Wenckebach basis function strengths are calculated in terms of the measured ECG signals, the nonsingular Wenckebach matrix W, and the nonsingular interference matrix R.Other References
| |
