scholarly journals Adiponectin Concentrations in Sera From Patients With Type 2 Diabetes Are Negatively Associated With Sympathovagal Balance as Evaluated by Power Spectral Analysis of Heart Rate Variation

Diabetes Care ◽  
2004 ◽  
Vol 27 (10) ◽  
pp. 2392-2397 ◽  
Author(s):  
S. Wakabayashi ◽  
Y. Aso
Keyword(s):  
Type 2 Diabetes ◽  
Heart Rate ◽  
Spectral Analysis ◽  
Power Spectral Analysis ◽  
Rate Variation ◽  
Sympathovagal Balance ◽  
Heart Rate Variation ◽  
Negatively Associated ◽  
Power Spectral

Entropy measures of heart rate variation in conscious dogs

1998 ◽  
Vol 274 (4) ◽  
pp. H1099-H1105 ◽  
Author(s):  
James A. Palazzolo ◽  
Fawzy G. Estafanous ◽  
Paul A. Murray
Keyword(s):  
Heart Rate ◽  
Symbolic Dynamics ◽  
Power Spectral Analysis ◽  
Approximate Entropy ◽  
Conscious Dogs ◽  
Rate Variation ◽  
Heart Rate Variation ◽  
Systemic Hypotension ◽  
Power Spectral ◽  
Entropy Measures

Our goal was to determine the contributions of sympathetic and parasympathetic activity to entropy measures of heart rate variability (HRV). We compared our results with two commonly used methods to analyze HRV: standard deviation (SDNN) and power spectral analysis (HF norm). Beat-by-beat analysis of R-R intervals was performed in conscious dogs. The R-R intervals were analyzed with approximate entropy (ApEn) and entropy of symbolic dynamics (SymDyn) to assess the effects of reducing system complexity. This was achieved by pharmacologically inhibiting sympathetic, parasympathetic, and total autonomic nervous system regulation of heart rate. Three conditions were examined: rest, standing, and systemic hypotension. At rest or standing, sympathetic inhibition (propranolol) had no effect on ApEn or SymDyn, whereas parasympathetic (atropine) and combined (propranolol + atropine) inhibition reduced both entropy measures to near zero. Systemic hypotension reduced both entropy measures in intact dogs. When hypotension was induced after sympathetic inhibition, ApEn was increased compared with hypotension alone, whereas parasympathetic inhibition with hypotension resulted in near-zero ApEn. Changes in the entropy measures of HRV were directionally similar to changes in SDNN and HF norm. These results indicate that the entropy of R-R intervals reflects parasympathetic modulation of heart rate.

20 Influence of postural change on the sympathovagal balance, estimated by power spectral analysis of heart rate nervous variability in normal subjects

1993 ◽  
Vol 11 (5) ◽  
pp. S404
Author(s):  
L. Bieniaszewski ◽  
Andrzej Rynkiewicz ◽  
Jaroslaw Furmanski ◽  
Krzysztof Narkiewicz ◽  
Barbara Krupa-Wojciechowska
Keyword(s):  
Heart Rate ◽  
Spectral Analysis ◽  
Power Spectral Analysis ◽  
Normal Subjects ◽  
Sympathovagal Balance ◽  
Postural Change ◽  
Power Spectral

Power spectral analysis of heart-rate variations improves assessment of diabetic cardiac autonomic neuropathy

Diabetes ◽  
1992 ◽  
Vol 41 (5) ◽  
pp. 633-640 ◽  
Author(s):  
F. Bellavere ◽  
I. Balzani ◽  
G. De Masi ◽  
M. Carraro ◽  
P. Carenza ◽  
...  
Keyword(s):  
Heart Rate ◽  
Spectral Analysis ◽  
Autonomic Neuropathy ◽  
Power Spectral Analysis ◽  
Cardiac Autonomic Neuropathy ◽  
Power Spectral ◽  
Diabetic Cardiac Autonomic Neuropathy

Power spectral analysis of heart rate and blood pressure variability in anaesthetized dogs

1992 ◽  
Vol 146 (2) ◽  
pp. 155-164 ◽  
Author(s):  
A. E. HEDMAN ◽  
J. E. K. HARTIKAINEN ◽  
K. U. O. TAHVANAINEN ◽  
M. O. K. HAKUMÄKI
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Spectral Analysis ◽  
Blood Pressure Variability ◽  
Power Spectral Analysis ◽  
Power Spectral
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