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Rate dependent far-field R wave sensing in an atrial tachyarrhythmia therapy device
Robert F Collins1, Connor Haugh, David Casavant
1Medtronic, Incorporated, Minneapolis, Minnesota, USA.
Pacing and Clinical Electrophysiology : PACE
|March 7, 2002
Abstract:
A case is reported of far-field R wave (FFRW) oversensing resulting in inappropriate atrial tachycardia (AT) detection by a dual chamber pacemaker incorporating atrial autoadjusting sensitivity (AAS). FFRW oversensing occurred during periods of functional atrial undersensing (FAU) with PR interval prolongation. Limitations of the pacemaker's ability to reject FFRWs and programming considerations for addressing this unique behavior are discussed.