PMID: 8945030Nov 1, 1996Paper

Reliability of a new algorithm for automatic mode switching from DDDR to DDIR pacing mode in sinus node disease patients with chronotropic incompetence and recurrent paroxysmal atrial fibrillation

Pacing and Clinical Electrophysiology : PACE
Renato RicciF De Seta

Abstract

To evaluate the safety and efficacy of a new algorithm for automatic mode switching (AMS) from DDD-DDDR to DDIR, 26 patients, 16 females and 10 males, mean age 73 +/- 6 years of age, affected by sinus node disease, chronotropic incompetence, and recurrent paroxysmal atrial fibrillation (PAF) received the Medtronic Thera DR pacemaker. The device continuously calculates, in ms, the running average of the intrinsic atrial rate (MAR) and compares the current atrial interval (CAI) with the stored MAR. When the CAI is greater than the MAR it increases by 8 ms, and when the CAI is less than the MAR, it decreases by 23 ms. When MAR < or = 330 ms (182 beats/min), tachycardia is detected and AMS is activated. All patients had clinical evaluation, 12-lead ECG, Holter monitoring, and exercise testing after implantation and every 3 months for 1 year. The results were compared with the data stored in the pacemaker memory: AMS episodes number; the histogram of the last 14 episodes; and atrial electrogram recording. Twenty-two Holter recordings in 13 patients showed PAF and in all of them AMS occurred simultaneously. AMS lasted between 10 seconds and 20 hours, and MAR ranged from 195-400 beats/min. No episode of PAF and no AMS were recorded in...Continue Reading

References

Apr 1, 1990·Pacing and Clinical Electrophysiology : PACE·R Sutton
Aug 1, 1989·Pacing and Clinical Electrophysiology : PACE·H G Mond
Mar 1, 1994·Pacing and Clinical Electrophysiology : PACE·M IrwinB Goldman
Nov 1, 1994·Pacing and Clinical Electrophysiology : PACE·P A LevineB Mann
Nov 1, 1994·Pacing and Clinical Electrophysiology : PACE·I E OvsyshcherC Bondy
Feb 1, 1996·Pacing and Clinical Electrophysiology : PACE·M A WoodK A Ellenbogen

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Citations

May 3, 2007·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·John Silberbauer, Neil Sulke
Jan 9, 2003·Journal of the American College of Surgeons·Jean-Yves MabrutChristian Ducerf
Jul 15, 2004·Journal of Cardiovascular Electrophysiology·Rod S PassmanAlan H Kadish
Jul 15, 2004·Journal of Cardiovascular Electrophysiology·N A Mark Estes
Apr 11, 2003·Pacing and Clinical Electrophysiology : PACE·Wayne M PollakRaul D Mitrani
May 4, 2000·Pacing and Clinical Electrophysiology : PACE·U K WiegandJ Potratz
Dec 19, 2001·Anesthesiology·J L Atlee, A D Bernstein
Sep 23, 1998·Pacing and Clinical Electrophysiology : PACE·S GarrigueJ Clémenty
Feb 28, 2001·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·H J MarshallM D Gammage

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