Document Detail


Circadian pattern of atrial pacing threshold in the young.
MedLine Citation:
PMID:  18256120     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIM: The aim of this study was to evaluate the circadian variation of atrial pacing threshold in young patients. METHODS AND RESULTS: Atrial Capture Management (ACM) algorithm is a Medtronic EnPulse pacemaker (PM) feature that uses two algorithms: atrioventricular conduction (AVC) (atrial pacing and spontaneous AVC) and atrial chamber reset (ACR) [intrinsic atrial activity with atrioventricular block (AVB)]. For this prospective, non-randomized study, ACM automatically measured and recorded thresholds every 4 h. Data are reported as median (range) or mean +/- SD. In 2004-05, 14 consecutive patients (11 males, 79%), aged 12 years (1 day-24 years) received an EnPulse DDD/R PM for AVB (eight patients, 57%) or sinus node dysfunction. A new pacing system was implanted in eight patients (57%) and a replaced PM in six patients. Epicardial leads were implanted in 10 patients (71%). The follow-up duration is 11 (1-18) months: 9742 threshold measurements were attempted (6328 AVC, 3414 ACR), of which 3797 (39%) were successful (1807 AVC, 29%, 1990 ACR, 58%) in 11 (79%) patients. Three infants had no successful measurements. Measurement success was 42 +/- 34% (AVC 27 +/- 39%, ACR 41 +/- 29%). Higher thresholds were found between 00.00 and 12.00 a.m. and lower between 12.00 and 20.00. CONCLUSION: Young patients show a circadian variability of atrial threshold with higher thresholds between 00.00 and 12.00.
Authors:
Massimo S Silvetti; Antonella De Santis; Simona Marcora; Tiziana De Santo; Nicoletta Grovale; Fabrizio Drago
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  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     Volume:  10     ISSN:  1532-2092     ISO Abbreviation:  Europace     Publication Date:  2008 Feb 
Date Detail:
Created Date:  2008-02-07     Completed Date:  2008-04-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100883649     Medline TA:  Europace     Country:  England    
Other Details:
Languages:  eng     Pagination:  147-50     Citation Subset:  IM    
Affiliation:
Dipartimento Medico-Chirurgico di Cardiologia, Ospedale Pediatrico Bambino Gesù, Piazza S. Onofrio 4, 00165 Roma, Italy. silvetti@opbg.net
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Algorithms
Atrioventricular Node / physiopathology
Cardiac Pacing, Artificial*
Child
Child, Preschool
Circadian Rhythm / physiology*
Female
Follow-Up Studies
Heart Atria / physiopathology
Heart Block / diagnosis*,  physiopathology*,  therapy
Humans
Infant
Infant, Newborn
Male
Pacemaker, Artificial*
Prospective Studies

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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