Triggering atrial fibrillation electrodes in implantable devices

Abstract

An apparatus includes: a sensing circuit configured to generate a sensed physiological signal representative of cardiac activity of a subject; an arrhythmia detection circuit; a control circuit and a memory. The arrhythmia detection circuit detects the onset of atrial fibrillation (AF) in the sensed cardiac signal using a first AF detection criterion and detects the onset of AF using a second AF detection criterion. The first AF detection standard has a higher sensitivity for AF detection than the second AF detection standard, and the second AF detection standard has a higher specificity for AF detection than the first AF detection standard. When an onset of AF is detected by both the first AF detection criterion and the second AF detection criterion, the control circuit initiates storage of sampled values ​​of a segment of the cardiac signals including the onset of AF.

Description

[0001] priority claim [0002] This application claims the benefit of priority under 35 U.S.C. §119(e) of U.S. Provisional Patent Application Serial No. 62 / 199,022, filed July 30, 2015, which is hereby incorporated by reference in its entirety. Background technique [0003] Ambulatory medical devices include implantable medical devices (IMDs), wearable medical devices, handheld medical devices, and other medical devices. Some examples of IMDs include devices such as implantable pacemakers, implantable cardioverter defibrillators (ICD), subcutaneous implantable cardioverter defibrillators (S-ICD), cardiac resynchronization therapy devices (CRT) Cardiac Function Management (CFM) devices and devices comprising combinations of such capabilities. The device may be used to treat a patient or subject using electrotherapy or other therapy, or to assist a physician or caregiver in patient diagnosis by internally monitoring the patient's condition. [0004] Some implantable medical de...

AI Technical Summary

Problems solved by technology

[0007] CFM devices are implantable, but in some cases may not include dedicated atrial sensing capabilities

Additionally, some diagnostic-only implantable, wearable, and handheld devices do not include dedicated atrial sensing capabilities

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