Document Detail


Baroreflex sensitivity and heart rate variability in coronary disease compared to dilated cardiomyopathy.
MedLine Citation:
PMID:  9825359     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study was designed to compare baroreceptor sensitivity and heart rate variability as measures of cardiac autonomic tone in patients with coronary disease (CAD, n = 49) and idiopathic dilated cardiomyopathy (IDC, n = 130). Time domain heart rate variability, including SDNN, SDANN, and pNN50, was determined during 24-hour Holter ECG. Baroreflex sensitivity was analyzed nonivasively using the phenylephrine method. Baroreflex sensitivity and heart rate variability were comparable between patients with CAD versus IDC (baroreflex sensitivity: 6.1 +/- 3 vs 6.9 +/- 5 ms/mmHg; SDNN: 97 +/- 40 vs 114 +/- 41 ms; SDANN: 83 +/- 33 vs 99 +/- 41 ms; pNN50: 3.9 +/- 4 vs 9.6 +/- 13 ms, P = NS for all comparisons). Likewise, a subgroup analysis of patients with a left ventricular ejection fraction (LVEF) < or = 30% showed no significant difference in baroreceptor sensitivity and heart rate variability between IDC and CAD patients. Patients with CAD and an LVEF > 30% had a decreased heart rate variability but not a decreased baroreflex sensitivity compared to patients with IDC and LVEF > 30% (baroreflex sensitivity: 6.4 +/- 4 vs 8.3 +/- 6 ms/mmHg, P = NS; SDNN: 98 +/- 19 vs 128 +/- 42 ms, P < 0.05; SDANN: 86 +/- 21 vs 112 +/- 43 ms, P < 0.05; pNN50: 4.2 +/- 3 vs 12.3 +/- 8 ms, P < 0.05). Patients with a markedly depressed LVEF show comparable alterations in cardiac autonomic tone whether they have CAD or IDC. Patients with CAD and preserved LV function, however, have a decreased heart rate variability compared to patients with IDC and preserved LV function. The prognostic significance of these findings will be determined prospectively in a large patient cohort at our institution.
Authors:
V Menz; W Grimm; J Hoffmann; S Born; C Schmidt; B Maisch
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Pacing and clinical electrophysiology : PACE     Volume:  21     ISSN:  0147-8389     ISO Abbreviation:  Pacing Clin Electrophysiol     Publication Date:  1998 Nov 
Date Detail:
Created Date:  1999-02-10     Completed Date:  1999-02-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7803944     Medline TA:  Pacing Clin Electrophysiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2416-9     Citation Subset:  IM    
Affiliation:
Department of Cardiology, Philipps-University of Marburg, Germany.
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MeSH Terms
Descriptor/Qualifier:
Baroreflex / physiology*
Cardiomyopathy, Dilated / physiopathology*
Coronary Disease / physiopathology*
Electrocardiography, Ambulatory
Female
Heart Rate / physiology*
Humans
Male
Middle Aged
Pressoreceptors / physiopathology*
Signal Processing, Computer-Assisted
Stroke Volume / physiology
Time Factors
Ventricular Function, Left / physiology

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


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