NDLI: Persistent alterations in heart rate variability, baroreflex sensitivity, and anxiety-like behaviors during development of heart failure in the rat.

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Persistent alterations in heart rate variability, baroreflex sensitivity, and anxiety-like behaviors during development of heart failure in the rat.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Henze, Marcus Hart, Davin Samarel, Allen Barakat, John Eckert, Laurie Scrogin, Karie
Description	Country affiliation: United States Author Affiliation: Henze M ( Dept. of Pharmacology, Loyola Univ. Stritch School of Medicine, Maywood, IL 60153, USA.)
Abstract	Depressed heart rate variability and mood are associated with increased mortality in patients with congestive heart failure (CHF). Here autonomic indexes were assessed 3 and 7 wk after left coronary artery ligation in telemetered rats, after which anxiety-like behaviors were assessed in an elevated plus maze. Low frequency (LF) and high frequency (HF) heart rate variability were reduced in CHF rats 3 wk after infarction (LF, 1.60 +/- 0.52 vs. 6.97 +/- 0.79 ms(2); and HF, 1.53 +/- 0.39 vs. 6.20 +/- 1.01 ms(2); P < 0.01). The number of sequences of interbeat intervals that correlated with arterial pressure was decreased in CHF rats at 3 and 7 wk (week 3, 26.60 +/- 10.85 vs. 59.75 +/- 11.4 sequences, P < 0.05; and week 7, 20.80 +/- 8.97 vs. 65.38 +/- 5.89 sequences, P < 0.01). Sequence gain was attenuated in CHF rats by 7 wk (1.34 +/- 0.06 vs. 2.70 +/- 0.29 ms/mmHg, P < 0.01). Coherence between interbeat interval and mean arterial blood pressure variability in the LF domain was reduced in CHF rats at 3 (0.12 +/- 0.03 vs. 0.26 +/- 0.05 k(2), P < 0.05) and 7 (0.16 +/- 0.02 vs. 0.31 +/- 0.05 k(2), P < 0.05) wk. CHF rats invariably entered the open arm of the elevated plus maze first and spent more time in the open arms (36.0 +/- 15% vs. 4.6 +/- 1.9%, P < 0.05). CHF rats also showed a tendency to jump head first off the apparatus, whereas controls did not. Together the data indicate that severe autonomic dysfunction is accompanied by escape-seeking behaviors in rats with verified CHF.
File Format	HTM / HTML
ISSN	03636135
e-ISSN	15221539
Journal	AJP: Heart and Circulatory Physiology
Issue Number	1
Volume Number	295
Language	English
Publisher	American Physiological Society
Publisher Date	2008-07-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Physiology Discipline Cardiology Anxiety Etiology Autonomic Nervous System Physiopathology Baroreflex Behavior, Animal Heart Failure Heart Rate Myocardial Infarction Complications Animals Blood Pressure Circadian Rhythm Disease Models, Animal Escape Reaction Psychology Motor Activity Rats, Sprague-dawley Telemetry Time Factors Ultrasonography Ventricular Function, Left Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Physiology Physiology (medical) Cardiology and Cardiovascular Medicine

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