CLASSIFICATION OF SUPRAVENTRICULAR AND VENTRICULAR CARDIAC RHYTHMS USING CROSS CHANNEL TIMING ALGORITHM
First Claim
1. An implantable cardiac defibrillator configured to be coupled to a first defibrillation electrode, a second defibrillation electrode, a supraventricular pacing electrode, and a further pacing electrode, the defibrillator comprising:
- a sensing system configured to be coupled to the first defibrillation electrode and the second defibrillation electrode and detect a first cardiac signal between the first defibrillation electrode and the second defibrillation electrode;
a control system coupled to the sensing system and configured to monitor the first cardiac signal for first cardiac complexes including first model cardiac complexes and first sensed cardiac complexes;
a pace output circuit coupled to the control system and the supraventricular electrode and configured to deliver electrical pulses to the supraventricular pacing electrode under control of the control system, wherein the control system is configured to monitor the first cardiac signal for the first model cardiac complexes as the electrical pulses are delivered to the supraventricular pacing electrode; and
a morphology analyzing circuit coupled to the control system and configured to receive the first model cardiac complexes for creation of a template feature vector for classification of the first sensed cardiac complexes.
0 Assignments
0 Petitions
Accused Products
Abstract
A system and method for classifying cardiac complexes sensed during a tachycardia episode. A first cardiac signal and a second cardiac signal are sensed, where the first cardiac signal has a voltage. A first cardiac complex and a second cardiac complex of a cardiac cycle are detected in the first and second cardiac signal, respectively. A predetermined alignment feature is identified in the second cardiac complex. A datum is defined, or positioned, at a specified interval from the predetermined alignment feature of the second cardiac complex. Voltage values are then measured from the first cardiac complex at each of two or more measurement intervals from the datum. The voltage values are then compared voltage values measured from NSR cardiac complexes to classify the first cardiac complex is either a ventricular tachycardia complex or a supraventricular tachycardiac complex.
-
Citations
20 Claims
-
1. An implantable cardiac defibrillator configured to be coupled to a first defibrillation electrode, a second defibrillation electrode, a supraventricular pacing electrode, and a further pacing electrode, the defibrillator comprising:
-
a sensing system configured to be coupled to the first defibrillation electrode and the second defibrillation electrode and detect a first cardiac signal between the first defibrillation electrode and the second defibrillation electrode; a control system coupled to the sensing system and configured to monitor the first cardiac signal for first cardiac complexes including first model cardiac complexes and first sensed cardiac complexes; a pace output circuit coupled to the control system and the supraventricular electrode and configured to deliver electrical pulses to the supraventricular pacing electrode under control of the control system, wherein the control system is configured to monitor the first cardiac signal for the first model cardiac complexes as the electrical pulses are delivered to the supraventricular pacing electrode; and a morphology analyzing circuit coupled to the control system and configured to receive the first model cardiac complexes for creation of a template feature vector for classification of the first sensed cardiac complexes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system, comprising:
-
a supraventricular pacing electrode; at least a first defibrillation electrode and a second defibrillation electrode; a sensing system coupled to the supraventricular pacing electrode and the first defibrillation electrode and the second defibrillation electrode, the sensing system configured to detect a first cardiac signal between the first defibrillation electrode and the second defibrillation electrode; a control system coupled to the sensing system and configured to monitor the first cardiac signal for first cardiac complexes including first model cardiac complexes and first sensed cardiac complexes; a pace output circuit coupled to the control system and configured to deliver electrical pulses to the supraventricular pacing electrode under control of the control system, wherein the control system is configured to monitor the first cardiac signal for the first model cardiac complexes as the electrical pulses are delivered to the supraventricular pacing electrode; and a morphology analyzing circuit coupled to the control system and configured to receive the first model cardiac complexes for creation of a template feature vector for classification of the first sensed cardiac complexes. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
-
16. A method comprising:
-
detecting, at differing first and second locations, respective first and second cardiac complexes that are both associated with a first heart depolarization; detecting a fiducial point in the first cardiac complex and noting a corresponding first cardiac complex fiducial point time; establishing measurement intervals using times corresponding to features in the second cardiac complex relative to the first cardiac complex fiducial point time; detecting, at the first and second locations, respective third and fourth cardiac complexes that are both associated with a second heart depolarization instance; detecting said fiducial point in the third cardiac complex and noting a corresponding third cardiac complex fiducial point time; and measuring voltages of the fourth cardiac complex at times using said measurement intervals taken relative to the third cardiac complex fiducial point time. - View Dependent Claims (17, 18, 19, 20)
-
Specification