Arrhythmia discrimination using electrocardiograms sensed from multiple implanted electrodes
First Claim
1. A cardiac method, comprising:
- sensing a plurality of composite cardiac signals using a plurality of implantable electrodes;
performing a source separation using the sensed plurality of composite cardiac signals;
producing one or more cardiac signal vectors associated with all or a portion of one or more cardiac activation sequences based on the source separation;
determining one or more orientations of the one or more cardiac signal vectors; and
discriminating between supra-ventricular tachycardia (SVT) and ventricular tachycardia (VT) using the one or more orientations of the one or more cardiac signal vectors,wherein discriminating between SVT and VT comprises determining whether the one or more orientations of the one or more cardiac signal vectors are within a vector orientation range established based on one or more previous SVT events, and performing the source separation, producing the one or more cardiac signal vectors, determining the one or more orientations, and discriminating are each performed at least in part by circuitry of a medical system.
1 Assignment
0 Petitions
Accused Products
Abstract
Cardiac monitoring and/or stimulation methods and systems provide for monitoring, diagnosing, defibrillation and pacing therapies, or a combination of these capabilities, including cardiac systems incorporating or cooperating with neuro-stimulating devices, drug pumps, or other therapies. Embodiments relate generally to implantable medical devices employing automated cardiac activation sequence monitoring and/or tracking for arrhythmia discrimination. Embodiments are directed to devices and methods involving sensing a plurality of composite cardiac signals using a plurality of implantable electrodes. A source separation is performed using the sensed plurality of composite cardiac signals and the separation produces one or more cardiac signal vectors associated with one or more cardiac activation sequences that is indicative of ischemia. A change of the one or more cardiac signal vectors is detected using the one or more cardiac signal vectors. Cardiac arrhythmias are discriminated using the one or more cardiac signal vectors.
-
Citations
15 Claims
-
1. A cardiac method, comprising:
-
sensing a plurality of composite cardiac signals using a plurality of implantable electrodes; performing a source separation using the sensed plurality of composite cardiac signals; producing one or more cardiac signal vectors associated with all or a portion of one or more cardiac activation sequences based on the source separation; determining one or more orientations of the one or more cardiac signal vectors; and discriminating between supra-ventricular tachycardia (SVT) and ventricular tachycardia (VT) using the one or more orientations of the one or more cardiac signal vectors, wherein discriminating between SVT and VT comprises determining whether the one or more orientations of the one or more cardiac signal vectors are within a vector orientation range established based on one or more previous SVT events, and performing the source separation, producing the one or more cardiac signal vectors, determining the one or more orientations, and discriminating are each performed at least in part by circuitry of a medical system. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A cardiac system, comprising:
-
a plurality of implantable electrodes configured for sensing a composite signal, thereby providing a plurality of composite cardiac signals; a housing configured for implantation in a patient; a memory provided in the housing; and a controller provided in the housing and coupled to the memory and the plurality of implantable electrodes, the controller configured to perform a source separation using the sensed plurality of composite cardiac signals, the source separation producing one or more cardiac signal vectors associated with all or a portion of one or more cardiac activation sequences, determine one or more orientations of the one or more cardiac signal vectors, and to discriminate between supra-ventricular tachycardia (SVT) and ventricular tachycardia (VT) using the one or more orientations of the one or more cardiac signal vectors; wherein the controller is further configured to establish a vector orientation range based on previous SVT events and discriminate between SVT and VT based on whether the one or more orientations of the one or more cardiac signal vectors are within the vector orientation range. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A cardiac method, comprising:
-
sensing a plurality of composite cardiac signals using a plurality of implantable electrodes; performing a source separation using the sensed plurality of composite cardiac signals; producing one or more cardiac signal vectors associated with all or a portion of one or more cardiac activation sequences based on the source separation; determining one or more orientations of the one or more cardiac signal vectors; establishing a vector orientation range based on a plurality of previous supra-ventricular tachycardia (SVT) events; discriminating between SVT and ventricular tachycardia (VT) using the one or more orientations of the one or more cardiac signal vectors, wherein performing the source separation, producing the one or more cardiac signal vectors, determining the one or more orientations, and discriminating are each performed at least in part by circuitry of a medical system; and detecting a tachycardia arrhythmia event, wherein discriminating between SVT and VT is performed based on the detection of the tachycardia arrhythmia event and further comprises; determining that the tachycardia arrhythmia event comprises SVT if the one or more orientations of the one or more cardiac signal vectors are within the vector orientation range; and determining that the tachycardia arrhythmia event comprises VT if the one or more orientations of the one or more cardiac signal vectors are not within the vector orientation range.
-
Specification