Rate dependent far-field R wave sensing in an atrial tachyarrhythmia therapy device.
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.
Collins
Robert F
RF
Medtronic, Incorporated, Minneapolis, Minnesota, USA.
Haugh
Connor
C
Casavant
David
D
Sheth
Nirav
N
Brown
Lois
L
Hook
Bruce
B
D000368:Aged; D001281:Atrial Fibrillation / Q000175:diagnosis* / Q000628:therapy*; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D005260:Female; D006801:Humans; D010138:Pacemaker, Artificial; D012680:Sensitivity and Specificity