| Analysis of mode switching algorithms in dual chamber pacemakers. | |
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MedLine Citation:
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PMID: 11990674 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Dual chamber systems are currently implanted in an increasing number of patients with a pacing indication and paroxysmal atrial tachyarrhythmias (ATAs). To avoid tracking of high atrial rates during ATA while providing AV synchronous pacing during sinus rhythm and AV block, automatic mode switching (MS) to a nontracking mode has been developed. Several concepts of MS algorithms have been introduced differing in sensitivity and specificity of ATA detection, delay between ATA onset and MS, pacing mode during MS, rapidity of MS termination upon detection of sinus rhythm, and special algorithms pertinent to MS. This review classifies and analyzes algorithms that are integrated into MS concepts and outlines considerations on optimal MS performance. Based on simulations and clinical studies, fast MS concepts avoiding high paced ventricular rates seem preferable but require special functions to avoid loss of AV synchrony by inappropriate MS. Similarly, fast return to tracking mode after ATA cessation seems preferable but requires algorithms to prevent mode oscillations. Sudden ventricular rate changes have to be avoided by rate smoothing functions, and an appropriate ventricular rate during nontracking mode has to be provided by rate responsive pacing. Programming of the device includes individual optimization of atrial sensitivity, atrial blanking times, and tachycardia detection rates. In addition, a high signal-to-noise ratio by careful atrial lead implantation, narrowly spaced bipolar atrial leads and a good sensing amplifier, together with special algorithms for atrial sensing adjustment improve the performance of MS algorithms. |
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Authors:
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Carsten W Israel |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 25 ISSN: 0147-8389 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 2002 Mar |
Date Detail:
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Created Date: 2002-05-06 Completed Date: 2002-12-12 Revised Date: 2005-11-16 |
Medline Journal Info:
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Nlm Unique ID: 7803944 Medline TA: Pacing Clin Electrophysiol Country: United States |
Other Details:
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Languages: eng Pagination: 380-93 Citation Subset: IM |
Affiliation:
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J. W. Goethe University, Department of Medicine, Frankfurt, Germany. C.W.Israel@em.uni-frankfurt.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms* Cardiac Pacing, Artificial / methods* Electrocardiography Heart Atria Humans Pacemaker, Artificial* Sensitivity and Specificity Software Tachycardia / diagnosis, therapy* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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