Hemodynamically unstable ventricular arrhythmia detection
AssigneeMedtronic, Inc.
InventorsTodd J. SHELDON, Wade M. DEMMER, Teresa A. WHITMAN
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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.
Claims16
An implantable medical device system, comprising:
- an activity sensor configured to produce a 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 an activity sensor signal;
- confirm 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.
Dependencies are inferred from the claim text.