Hemodynamically unstable ventricular arrhythmia detection
First Claim
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1. An implantable medical device system, comprising:
- an activity sensor configured to produce an activity sensor signal correlated to patient activity and comprising heart motion signals; and
a cardiac pacemaker comprising;
a first sensing module configured to receive a first cardiac electrical signal;
a pulse generator configured to generate and deliver pacing pulses to a patient'"'"'s heart via a pair of electrodes; and
a control module coupled to the first sensing module, the pulse generator and the activity sensor and configured to;
detect a ventricular tachyarrhythmia from the first cardiac electrical signal;
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; and
control the pulse generator to withhold 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.
38 Citations
17 Claims
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1. An implantable medical device system, comprising:
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an activity sensor configured to produce an activity sensor signal correlated to patient activity and comprising heart motion signals; and a cardiac pacemaker comprising; a first sensing module configured to receive a first cardiac electrical signal; a pulse generator configured to generate and deliver pacing pulses to a patient'"'"'s heart via a pair of electrodes; and a control module coupled to the first sensing module, the pulse generator and the activity sensor and configured to; detect a ventricular tachyarrhythmia from the first cardiac electrical signal; 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; and control the pulse generator to withhold 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, 16)
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17. A non-transitory, computer readable storage medium storing a set of instructions that, when executed by control circuitry of an implantable medical device 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; determine an activity metric from an activity sensor signal received by a control module of the pacemaker; confirm a hemodynamically unstable rhythm based on the activity metric; and withhold anti-tachycardia pacing (ATP) by the pacemaker in response to confirming the hemodynamically unstable rhythm.
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Specification