Hemodynamically unstable ventricular arrhythmia detection
First Claim
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1. A method comprising:
- sensing a first cardiac electrical signal;
detecting a ventricular tachyarrhythmia from the first cardiac electrical signal;
obtaining, from an activity sensor, an activity sensor signal, the activity sensor signal correlated to patient activity and comprising heart motion signals;
determining an activity metric from the activity sensor signal;
comparing the activity metric to an unstable rhythm threshold;
confirming the detected ventricular tachyarrhythmia as being a hemodynamically unstable rhythm based on the activity metric being less than the unstable rhythm threshold; and
withholding anti-tachycardia pacing (ATP) in response to confirming the hemodynamically unstable rhythm.
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Abstract
An implantable medical device system includes a pacemaker and an implantable cardioverter defibrillator (ICD). The pacemaker is configured to confirm a hemodynamically unstable rhythm based on an activity metric determined from an activity sensor signal after detecting a ventricular tachyarrhythmia and withhold anti-tachycardia pacing (ATP) pulses in response to confirming the hemodynamically unstable rhythm. The pacemaker may deliver ATP when a hemodynamically unstable rhythm is not confirmed based on the activity metric. The ICD is configured to detect the ATP and withhold a shock therapy in response to detecting the ATP in some examples.
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Citations
17 Claims
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1. A method comprising:
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sensing a first cardiac electrical signal; detecting a ventricular tachyarrhythmia from the first cardiac electrical signal; obtaining, from an activity sensor, an activity sensor signal, the activity sensor signal correlated to patient activity and comprising heart motion signals; determining an activity metric from the activity sensor signal; comparing the activity metric to an unstable rhythm threshold; confirming the detected ventricular tachyarrhythmia as being a hemodynamically unstable rhythm based on the activity metric being less than the unstable rhythm threshold; and withholding anti-tachycardia pacing (ATP) in response to confirming the hemodynamically unstable rhythm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A non-transitory computer readable storage medium storing a set of instructions that, when executed by control circuitry of a medical system, cause the system to:
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sense a first cardiac electrical signal by an electrical sensing module of a cardiac pacemaker; detect, by the pacemaker, a ventricular tachyarrhythmia from the first cardiac electrical signal; obtain, from an activity sensor of the pacemaker, an activity sensor signal, the activity sensor signal correlated to patient activity and comprising heart motion signals; determine an activity metric from the activity sensor signal; confirm the detected ventricular tachyarrhythmia as being a hemodynamically unstable rhythm based on the activity metric being less than the unstable rhythm threshold; and withhold anti-tachycardia pacing (ATP) by the pacemaker in response to confirming the hemodynamically unstable rhythm. - View Dependent Claims (17)
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Specification