title: Evaluation of pacemaker telemetry as a diagnostic feature for detecting atrial tachyarrhythmias in patients with sick sinus syndrome.
abstract: OBJECTIVE
  The aim of the present study was to validate pacemaker telemetry as a diagnostic feature for detecting atrial tachyarrhythmias (AT) during pacemaker treatment in patients with sick sinus syndrome (SSS).
  
  
  RESULTS
  Patients with SSS and bradytachy syndrome (n = 28, 20 women), mean age 71 +/- 10.3 years, were included. The patients were treated with AAIR (n = 14) or DDDR pacing. At a routine follow-up visit pacemaker telemetry was reset and the patients underwent Holter recording for at least 24 h. Episodes of atrial fibrillation (AF) during Holter recording were compared with episodes of AT detected by the pacemaker. Only episodes of AF lasting for at least 1 min during Holter recording were registered. AT detected by the pacemaker telemetry was defined as: an atrial high rate episode with a rate of > or = 220 bpm for > or = 5 min, atrial sensing with a rate of > or = 170 bpm in > or = 5% of total counted beats, mode-switching in > or = 5% of total time recorded or a mode-switching episode of > or = 5 min. Twenty-eight Holter recordings (mean duration 31.5 h, range 20-72 h) were used for evaluation. Ten patients had one or more episodes of AF lasting at least 1 min on their Holter recordings. Nine of these patients had AT detected by their pacemaker telemetry according to our criteria. None of the patients had AT detected by the pacemaker telemetry and not by the Holter recording. The specificity and sensitivity for detection of AT recorded by the pacemaker telemetry in this study was 100% and 90%, respectively. The false-positive rate was 0%.
  
  
  CONCLUSIONS
  Pacemaker telemetry was found to be a reliable tool for detecting AT in patients with SSS.
authors.affiliation: Department of Cardiology, Skejby Hospital, Aarhus University Hospital, Brendstrupgaardsvej, 8200 Aarhus N, Denmark.
authors.forename: Lene
authors.initials: L
authors.lastname: Kristensen
authors.forename: Jens Cosedis
authors.initials: JC
authors.lastname: Nielsen
authors.forename: Peter Thomas
authors.initials: PT
authors.lastname: Mortensen
authors.forename: Anders Kirstein
authors.initials: AK
authors.lastname: Pedersen
authors.forename: Henning Rud
authors.initials: HR
authors.lastname: Andersen
mesh_terms: D000368:Aged; D015716:Electrocardiography, Ambulatory; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D012680:Sensitivity and Specificity; D012804:Sick Sinus Syndrome / Q000628:therapy*; D013610:Tachycardia / Q000175:diagnosis*; D013686:Telemetry