510 Heart rate variability (power-law-regression) and age in patients with decompensated chronic heart failure

2004 ◽  
Vol 3 (1) ◽  
pp. 131
Author(s):  
H SCHMIDT
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Chronic Heart Failure ◽  
Power Law

scholarly journals Preprocessing Unevenly Sampled RR Interval Signals to Enhance Estimation of Heart Rate Deceleration and Acceleration Capacities in Discriminating Chronic Heart Failure Patients from Healthy Controls

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Ping Cao ◽  
Bailu Ye ◽  
Linghui Yang ◽  
Fei Lu ◽  
Luping Fang ◽  
...  
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Chronic Heart Failure ◽  
Characteristic Curve ◽  
Clinical Analysis ◽  
Healthy Controls ◽  
Heart Failure Patients ◽  
Rr Interval ◽  
Frequency Components

Objective. The deceleration capacity (DC) and acceleration capacity (AC) of heart rate, which are recently proposed variants to the heart rate variability, are calculated from unevenly sampled RR interval signals using phase-rectified signal averaging. Although uneven sampling of these signals compromises heart rate variability analyses, its effect on DC and AC analyses remains to be addressed. Approach. We assess preprocessing (i.e., interpolation and resampling) of RR interval signals on the diagnostic effect of DC and AC from simulation and clinical data. The simulation analysis synthesizes unevenly sampled RR interval signals with known frequency components to evaluate the preprocessing performance for frequency extraction. The clinical analysis compares the conventional DC and AC calculation with the calculation using preprocessed RR interval signals on 24-hour data acquired from normal subjects and chronic heart failure patients. Main Results. The assessment of frequency components in the RR intervals using wavelet analysis becomes more robust with preprocessing. Moreover, preprocessing improves the diagnostic ability based on DC and AC for chronic heart failure patients, with area under the receiver operating characteristic curve increasing from 0.920 to 0.942 for DC and from 0.818 to 0.923 for AC. Significance. Both the simulation and clinical analyses demonstrate that interpolation and resampling of unevenly sampled RR interval signals improve the performance of DC and AC, enabling the discrimination of CHF patients from healthy controls.

Deep Breathing Heart Rate Variability is Associated with Inspiratory Muscle Weakness in Chronic Heart Failure

2013 ◽  
Vol 19 (1) ◽  
pp. 16-24 ◽  
Author(s):  
Michel Silva Reis ◽  
Ross Arena ◽  
Bruno Archiza ◽  
Carlos Fischer de Toledo ◽  
Aparecida Maria Catai ◽  
...  
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Chronic Heart Failure ◽  
Muscle Weakness ◽  
Inspiratory Muscle ◽  
Deep Breathing

scholarly journals The ergoreflex activity during exercise: Predictor of impaired heart rate variability in chronic heart failure

2000 ◽  
Vol 2 ◽  
pp. 50-50 ◽  
Author(s):  
M.F. Piepoli ◽  
M. Volterrani ◽  
P. Ponikowski ◽  
A. Giordano ◽  
A. Capucci ◽  
...  
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Chronic Heart Failure

Nonlinear Indices of Heart Rate Variability in Chronic Heart Failure Patients: Redundancy and Comparative Clinical Value

2007 ◽  
Vol 18 (4) ◽  
pp. 425-433 ◽  
Author(s):  
ROBERTO MAESTRI ◽  
GIAN DOMENICO PINNA ◽  
AGOSTINO ACCARDO ◽  
PAOLO ALLEGRINI ◽  
RITA BALOCCHI ◽  
...  
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Chronic Heart Failure ◽  
Clinical Value ◽  
Heart Failure Patients

A role of heart rate variability to diagnose central sleep apnea in patients with chronic heart failure

2004 ◽  
Vol 10 (5) ◽  
pp. S174
Author(s):  
Koji Fukuda ◽  
Shinozaki Tsuyoshi ◽  
Ogawa Hiromasa ◽  
Sugimura Koichiro ◽  
Kagaya Yutaka ◽  
...  
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Sleep Apnea ◽  
Chronic Heart Failure ◽  
Central Sleep Apnea

Diastolic ventricular interaction in chronic heart failure: relation to heart rate variability and neurohumoral status

1998 ◽  
Vol 13 (6) ◽  
pp. 269-277 ◽  
Author(s):  
John J. Atherton ◽  
Daniel J. Blackman ◽  
Thomas D. Moore ◽  
Anthony W. Bachmann ◽  
Terence J. Tunny ◽  
...  
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Chronic Heart Failure ◽  
Ventricular Interaction
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