Document Detail


Heart rate variability in patients with acute myocardial infarction undergoing primary coronary angioplasty.
MedLine Citation:
PMID:  10758919     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Depressed heart rate variability (HRV) has been associated with adverse outcome during and after acute myocardial infarction (AMI). The effects of reperfusion in AMI on the course of HRV have not been well characterized as yet. We analyzed 123 consecutive patients with a first AMI who underwent successful reperfusion (Thrombolysis In Myocardial Infarction grades 2 and 3) by primary percutaneous transluminal coronary angioplasty (PTCA). Time- and frequency-domain HRV was measured from 24-hour Holter monitoring, which began at hospital admission. Mean RR interval increased significantly after successful PTCA. Reperfusion immediately caused an immediate transient depression of HRV, which was followed by a significant increase of HRV. Quantitative markers of sympathetic activity and sympathovagal balance, such as SD of the averages of NN intervals in all 5-minute segments, and low- and/or high-frequency ratio continuously decreased within the observation period. Patients with anterior AMI exhibited the same pattern of temporal changes of HRV, with, however, lower absolute values for HRV and mean RR interval than patients with non-anterior AMI. Subgroup analysis in 21 patients with reperfusion > 12 hours after onset of pain showed that the biphasic profile of HRV and the marked increase of mean RR interval was absent. Furthermore, in patients with late reperfusion, HRV was significantly lower compared with those with early reperfusion. Thus, timely reperfusion in AMI leads to a biphasic effect on autonomic tone, characterized by a transient suppression, followed by a significant activation of the vagal tone, as well as an attenuation of sympathetic activity. Recovery of HRV may contribute to the benefits of early reperfusion in AMI.
Authors:
H Bonnemeier; F Hartmann; U K Wiegand; C Irmer; T Kurz; R Tölg; H A Katus; G Richardt
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The American journal of cardiology     Volume:  85     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  2000 Apr 
Date Detail:
Created Date:  2000-04-21     Completed Date:  2000-04-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  815-20     Citation Subset:  AIM; IM    
Affiliation:
Medizinische Klinik II, Medizinische Universität zu Lübeck, Germany. Bonnemei@medinf.nu-Luebeck.de
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Angioplasty, Transluminal, Percutaneous Coronary*
Circadian Rhythm / physiology*
Electrocardiography, Ambulatory
Female
Heart Rate / physiology*
Humans
Male
Middle Aged
Myocardial Infarction / physiopathology*,  therapy*
Prognosis
Prospective Studies

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


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