Heart rate variability in chronic heart failure

Guzzetti, Stefano; Magatelli, Renata; Borroni, Ester; Mezzetti, Silvia

doi:10.1016/s1566-0702(01)00274-0

Cited by 67 publications

(44 citation statements)

References 31 publications

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“…Different pathological situations seem to have different complexity and regularity properties. Complexity seems to be reduced in CHF patients with a higher risk condition [9], [10], [11] and [12].…”

Section: Introductionmentioning

confidence: 94%

Correntropy-based nonlinearity test applied to patients with chronic heart failure

Garde

Sörnmo

Jané

et al. 2010

2010 Annual International Conference of the IEEE Engineering in Medicine and Biology

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Abstract-In this study we propose the correntropy function as a discriminative measure for detecting nonlinearities in the respiratory pattern of chronic heart failure (CHF) patients with periodic or nonperiodic breathing pattern (PB or nPB, respectively). The complexity seems to be reduced in CHF patients with higher risk level. Correntropy reflects information on both, statistical distribution and temporal structure of the underlying dataset. It is a suitable measure due to its capability to preserve nonlinear information. The null hypothesis considered is that the analyzed data is generated by a Gaussian linear stochastic process. Correntropy is used in a statistical test to reject the null hypothesis through surrogate data methods. Various parameters, derived from the correntropy and correntropy spectral density (CSD) to characterize the respiratory pattern, presented no significant differences when extracted from the iteratively refined amplitude adjusted Fourier transform (IAAFT) surrogate data. The ratio between the powers in the modulation and respiratory frequency bands R was significantly different in nPB patients, but not in PB patients, which reflects a higher presence of nonlinearities in nPB patients than in PB patients.

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Section: Introductionmentioning

confidence: 94%

Correntropy-based nonlinearity test applied to patients with chronic heart failure

Garde

Sörnmo

Jané

et al. 2010

2010 Annual International Conference of the IEEE Engineering in Medicine and Biology

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“…The HRV can be determined over brief periods by electrocardiogram or, more frequently, during ambulatory electrocardiographic monitoring (24-hour Holter monitoring) (CALVERT, 1998;CALVERT;WALL, 2001aWALL, , 2001bGRUPI, 2008;RASSI JUNIOR, 2010). As a research tool, HRV evaluation has allowed a better understanding of the contribution of the autonomic nervous system in different physiological (ABBOT, 2007;FARIA;SOUZA, 2009;OLIVEIRA et al, 2011), pathological (CALVERT;WALL, 2001b;GUZZETTI et al, 2001) and therapeutic (CALVERT, 1998;CARARETO et al, 2007) settings.…”

Section: Introductionmentioning

confidence: 99%

Heart rate variability indices in the time domain in healthy dogs supplemented with omega n-3

Santos

Araújo

Gonçalves³

et al. 2014

Sem. Ci. Agr.

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The analysis of heart rate variability (HRV) in the time domain was performed by dynamic electrocardiographic monitoring for twenty-four hours (Holter method) in ten male and ten female healthy mixed-breed dogs before and after four weeks of oral supplementation with long-chain polyunsaturated fatty acids (PUFAs) derived from omega n-3 [497 mg docosahexaenoic acid (DHA) and 780 mg eicosapentaenoic acid (EPA)]. Males received an average dose of 34.9 mg DHA/kg and 22.2 mg EPA/kg, whereas females received an average of 27 mg DHA/kg and 43 mg EPA/kg. HRV indices calculated in the time domain were the following: NN, SDNN, SDANN, SDNN index, pNN50, rMSSD and heart rate, taking into account the effects of gender and supplementation. The results showed no significant effects of supplementation or gender on the indices; thus, dietary supplementation with omega PUFAs derived from n-3 over four weeks did not decrease heart rate and did not increase heart rate variability in healthy dogs. Key words: Dog, HRV, PUFAs, holter ResumoA análise da variabilidade da frequência cardíaca (VFC) no domínio do tempo, foi realizada por meio da monitorização eletrocardiográfica dinâmica em vinte e quatro horas (Holter), em cães sadios, sem raça definida, sendo dez machos e dez fêmeas, antes e após suplementação oral, por quatro semanas com ácido graxos poliinsaturados de cadeia longa (PUFAS) derivados do ômega n-3 [497 mg ácido docosahexaenóico (DHA) e 780 mg ácido eicosapentanóico (EPA)], resultando em uma dose média de 34,9 mg/kg de EPA e 22,2 mg/kg de DHA em machos e média de 43 mg/kg de EPA e 27 mg/kg em fêmeas. Os índices da VFC calculados no domínio do tempo foram: NN, SDNN, SDANN, SDNN índex, pnn50 e rMSSD e frequência cardíaca, verificando-se o efeito do sexo e da suplementação. Os resultados obtidos não demonstraram efeitos significativos da suplementação ou influência do sexo

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“…HRV is widely studied in patients suffering from Chronic Heart Failure (CHF) [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. CHF is a patho-physiological condition in which an abnormal cardiac function is responsible for the failure of the heart to pump blood as required by the body.…”

Section: Introductionmentioning

confidence: 99%

Discrimination Power of Short-Term Heart Rate Variability Measures for CHF Assessment

Pecchia

Melillo

Sansone

et al. 2011

IEEE Trans. Inform. Technol. Biomed.

100

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Abstract-In this study, we investigated the discrimination power of short-term Heart Rate Variability (HRV) for discriminating normal subjects versus Chronic Heart Failure (CHF) patients. We analyzed 1,914.40 hours of ECG of 83 patients of which 54 are normal and 29 are suffering from CHF with New York Heart Classification (NYHA) I, II, III, extracted by public databases. Following guidelines, we performed time and frequency analysis in order to measure HRV features. To assess the discrimination power of HRV features we designed a classifier based on the Classification and Regression Tree (CART) method, which is a non-parametric statistical technique, strongly effective on non-normal medical data mining. The best subset of features for subject classification includes RMSSD, total power, high frequencies power and the ratio between low and high Frequencies power (LF/HF). The classifier we developed achieved specificity and sensitivity values of 79.31% and 100% respectively. Moreover, we demonstrated that it is possible to achieve specificity and sensitivity of 89.7% and 100% respectively, by introducing two non-standard features ∆ ∆ ∆ ∆AVNN and ∆ ∆ ∆ ∆LF/HF, which account respectively for variation over the 24 hours of the average of consecutive normal intervals (AVNN) and LF/HF. Our results are comparable with other similar studies, but the method we used is particularly valuable because it allows a fully human-understandable description of classification procedures, in terms of intelligible "if … then …" rules.

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Heart rate variability in chronic heart failure

Cited by 67 publications

References 31 publications

Correntropy-based nonlinearity test applied to patients with chronic heart failure

Correntropy-based nonlinearity test applied to patients with chronic heart failure

Heart rate variability indices in the time domain in healthy dogs supplemented with omega n-3

Discrimination Power of Short-Term Heart Rate Variability Measures for CHF Assessment

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