Inappropriate mode switching in a dual chamber pacemaker due to oversensing of a high frequency signal from a conductor/ring discontinuity (loose set screw).
Two unusual cases are reported of pacemaker oversensing of the impedance pulse by the atrial channel attributed to a loose set screw.
Kuruvilla
Cheriparambil
C
Division of Cardiology, New York Methodist Hospital (Clinical Affiliate of The New York Presbyterian Hospital System-New York Hospital Site), 506 6th St., Brooklyn, NY 11215, USA.
Voigt
Louis
L
Kachmar
Kenneth
K
Reddy
C V R
CV
Kassotis
John
J
D000368:Aged; D000369:Aged, 80 and over; D016477:Artifacts; D017097:Electric Impedance; D004562:Electrocardiography; D004868:Equipment Failure; D005260:Female; D006327:Heart Block / Q000628:therapy; D006801:Humans; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D012680:Sensitivity and Specificity