Method and apparatus for accurate separation of supraventricular tachycardia from ventricular tachycardia during posture changes
First Claim
1. A method performed by an implantable medical device, comprising:
- sensing a first cardiac signal during a known cardiac rhythm from each of a plurality of available sensing vectors,generating, for each of the plurality of available sensing vectors, a plurality of morphology templates of the first cardiac signal for each of a plurality of patient postures;
sensing a second cardiac signal during an unknown cardiac rhythm using one or more of the plurality of available sensing vectors;
comparing the second cardiac signal to at least a portion of the plurality of morphology templates without determining a current posture of the patient;
detecting the unknown cardiac rhythm as supraventricular tachycardia in response to the second cardiac signal matching at least one of the plurality of morphology templates;
detecting the unknown cardiac rhythm as ventricular tachycardia in response to the second cardiac signal not matching any of the plurality of morphology templates; and
delivering a stimulation therapy in response to detecting the ventricular tachycardia.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable medical device system includes an implantable cardioverter defibrillator (ICD) for detecting and treating ventricular tachycardia (VT). The ICD includes a sensing module for sensing a cardiac signal from selected cardiac signal sensing vectors. A control module generates morphology templates of the cardiac signals for multiple patient postures for each of the available sensing vectors. A cardiac signal received during an unknown cardiac rhythm is compared to the morphology templates without determining a current posture of the patient. The unknown cardiac rhythm is detected and classified as supraventricular tachycardia in response to the cardiac signal matching at least one of the morphology templates.
54 Citations
21 Claims
-
1. A method performed by an implantable medical device, comprising:
-
sensing a first cardiac signal during a known cardiac rhythm from each of a plurality of available sensing vectors, generating, for each of the plurality of available sensing vectors, a plurality of morphology templates of the first cardiac signal for each of a plurality of patient postures; sensing a second cardiac signal during an unknown cardiac rhythm using one or more of the plurality of available sensing vectors; comparing the second cardiac signal to at least a portion of the plurality of morphology templates without determining a current posture of the patient; detecting the unknown cardiac rhythm as supraventricular tachycardia in response to the second cardiac signal matching at least one of the plurality of morphology templates; detecting the unknown cardiac rhythm as ventricular tachycardia in response to the second cardiac signal not matching any of the plurality of morphology templates; and delivering a stimulation therapy in response to detecting the ventricular tachycardia. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A medical device system, comprising:
-
a sensing module coupled to a plurality of electrodes defining a plurality of available sensing vectors, a therapy delivery module coupled to the plurality of electrodes, the therapy delivery module configured to deliver a tachycardia therapy; a control module configured to; generate, for each of the plurality of available sensing vectors, a plurality of morphology templates of a first cardiac signal received from the sensing module for each of a plurality of patient postures, the first cardiac signal received during a known cardiac rhythm; receive a second cardiac signal from the sensing module during an unknown cardiac rhythm using one or more of the plurality of available sensing vectors; compare the second cardiac signal to at least a portion of the plurality of morphology templates without determining a current posture of the patient; detect the unknown cardiac rhythm as supraventricular tachycardia in response to the second cardiac signal matching at least one of the plurality of morphology templates; detect the unknown cardiac rhythm as ventricular tachycardia in response to the second cardiac signal not matching any of the plurality of morphology templates; and cause the therapy delivery module to deliver a stimulation therapy in response to detecting the ventricular tachycardia. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A non-transitory, computer-readable medium storing a set of instructions which, when executed by a control module of an implantable medical device, cause the implantable medical device to:
-
sense a first cardiac signal during a known cardiac rhythm from each of a plurality of available sensing vectors, generate, for each of the plurality of available sensing vectors, a plurality of morphology templates of the first cardiac signal for each of a plurality of patient postures; sense a second cardiac signal during an unknown cardiac rhythm using one or more of the plurality of available sensing vectors; compare the second cardiac signal to at least a portion of the plurality of morphology templates without determining a current posture of the patient; detect the unknown cardiac rhythm as supraventricular tachycardia in response to the second cardiac signal matching at least one of the plurality of morphology templates; detect the unknown cardiac rhythm as ventricular tachycardia in response to the second cardiac signal not matching any of the plurality of morphology templates; and deliver a stimulation therapy in response to detecting the ventricular tachycardia.
-
Specification