PMID: 8945032Nov 1, 1996Paper

Ventricular protection against atrial arrhythmias in DDD pacing based on a statistical approach: clinical results

Pacing and Clinical Electrophysiology : PACE
L GencelT Lavergne

Abstract

Atrial arrhythmias (AA) are commonly encountered in DDD paced patients. Newer dual chamber pacemakers (PM) possess mode switching functions that convert pacing to an asynchronous mode when AAs are detected. The lack of a reliable mode switch leading to rapid, irregular ventricular responses may result from AA undersensing. To avoid this the DDDR PM Chorum 7234 Ela Medical AA diagnosis is based on a statistical approach: the PM constantly compares arrhythmic and sinus cycles and, based on "strong" and "weak" criteria, provides for rapid or slower mode switch. The aim of the study was to evaluate the efficiency and reliability of these two criteria. Thirty-one patients with a Chorum 7234 implanted for AV block (11), sinus dysfunction (10), both (5), or hypertrophic obstructive cardiomyopathy (5) were evaluated at 24 hours and 1 month using the internal memory (IM) of the PM, surface 24-hour Holter recordings, and exercise testing. Interrogation of the IM on the first day of study showed that 8 patients had mode switching episodes, based only on the strong criterion confirmed by the surface Holter recording. At 1 month, the IM revealed mode switching episodes in 12 patients, 6 of whom had used the weak criterion. No inappropriate ...Continue Reading

References

Nov 1, 1992·Pacing and Clinical Electrophysiology : PACE·M DetollenaereL Jordaens
Dec 1, 1990·Pacing and Clinical Electrophysiology : PACE·J GrossS Furman
Dec 1, 1989·The American Journal of Cardiology·J M FeuerJ C Messenger
Nov 1, 1984·Pacing and Clinical Electrophysiology : PACE·A J GreensponW S Frankl
Jun 1, 1994·Pacing and Clinical Electrophysiology : PACE·S S Barold, H G Mond
Nov 1, 1994·Pacing and Clinical Electrophysiology : PACE·I E OvsyshcherC Bondy
Oct 1, 1995·Pacing and Clinical Electrophysiology : PACE·G E PayneJ D Skehan

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