PMID: 8945031Nov 1, 1996Paper

Mode switch despite undersensing of atrial fibrillation in DDD pacing

Pacing and Clinical Electrophysiology : PACE
J L BonnetS Cazeau

Abstract

Mode switching algorithms are commonly used to protect the ventricles against high rates induced by atrial tachycardia. In the case of atrial fibrillation (AF), the response of these algorithms depends on the quality of atrial sensing. The Chorum 7234 DDDR pacemaker uses a new mode switching algorithm, based on a statistical analysis of the atrial rhythm. It includes two criteria of diagnosis: "high" if more than 28 of 32 cycles are abnormally accelerated; and "low" if more than 36 of 64 cycles are abnormally accelerated. From a taped database of electrophysiological studies, episodes of AF lasting more than 2 minutes were selected. A tape recorder replayed the atrial signals into an external Chorum device. Each episode was replayed eight times with a programmed atrial sensitivity increasing from 0.4-2.0 mV. For each criterion of diagnosis and each programmed sensitivity, the percentage of atrial sensing, the time to switching, and the mean ventricular rate were measured. Ten episodes of AF from 10 patients (9 men and 1 woman; ages 62 +/- 16 years) were included: 1.95 +/- 0.97 mV and 196 +/- 64 ms. The sensitivity of the algorithm to diagnose atrial tachycardia reached 100%, for an atrial sensitivity set between 0.4 and 1.0 mV....Continue Reading

References

Oct 1, 1978·Pacing and Clinical Electrophysiology : PACE·J L WellsA L Waldo
Nov 1, 1992·Pacing and Clinical Electrophysiology : PACE·M DetollenaereL Jordaens
Jan 1, 1990·Pacing and Clinical Electrophysiology : PACE·J M BaermanS Swiryn
Dec 1, 1990·Pacing and Clinical Electrophysiology : PACE·J GrossS Furman
Dec 1, 1990·Pacing and Clinical Electrophysiology : PACE·M T LeeJ Vandegriff
Dec 1, 1990·Pacing and Clinical Electrophysiology : PACE·H S KaragueuzianG A Diamond
Nov 1, 1991·Pacing and Clinical Electrophysiology : PACE·G VanerioT W Simmons
Feb 1, 1988·Pacing and Clinical Electrophysiology : PACE·H de BoerR van Mechelen
May 1, 1988·Pacing and Clinical Electrophysiology : PACE·J SlocumS Swiryn
May 1, 1988·Pacing and Clinical Electrophysiology : PACE·J JenkinsR Arzbaecher
Mar 1, 1985·Pacing and Clinical Electrophysiology : PACE·S Furman
Jun 1, 1994·Pacing and Clinical Electrophysiology : PACE·S S Barold, H G Mond
Jul 1, 1995·British Heart Journal·B IbrahimR Palmer
Apr 1, 1993·Pacing and Clinical Electrophysiology : PACE·M R PitneyM J Davis
Nov 1, 1994·Pacing and Clinical Electrophysiology : PACE·M BrignoleG Gaggioli
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
Nov 1, 1996·Pacing and Clinical Electrophysiology : PACE·E C PalmaJ N Gross

❮ Previous
Next ❯

Citations

Mar 25, 1999·The American Journal of Cardiology·N SaoudiA Cribier
Apr 11, 2003·Pacing and Clinical Electrophysiology : PACE·Wayne M PollakRaul D Mitrani
Apr 12, 2003·Pacing and Clinical Electrophysiology : PACE·Pierre BordacherPhilippe Ritter
May 4, 2000·Pacing and Clinical Electrophysiology : PACE·U K WiegandJ Potratz
Jul 22, 1998·Pacing and Clinical Electrophysiology : PACE·M LimousinL Geroux

❮ Previous
Next ❯

Related Concepts

Related Feeds

Atrial Fibrillation

Atrial fibrillation is a common arrhythmia that is associated with substantial morbidity and mortality, particularly due to stroke and thromboembolism. Here is the latest research.

Atrial Filbrillation

Atrial fibrillation refers to the abnormal heart rhythm characterized by rapid and irregular beating of the atria. Here is the latest research.

Arrhythmia

Arrhythmias are abnormalities in heart rhythms, which can be either too fast or too slow. They can result from abnormalities of the initiation of an impulse or impulse conduction or a combination of both. Here is the latest research on arrhythmias.