Cheyne-Stokes Respiration in Patients With Congestive Heart Failure: Causes and Consequences

Lorenzi-Filho, Geraldo; Genta, Pedro Rodrigues; Figueiredo, Adelaide C.; Inoue, Daniel Paganini

doi:10.1590/s1807-59322005000400012

Cited by 64 publications

(50 citation statements)

References 78 publications

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“…7 In our study, which is part of a general research project on obstructive apnea in out Institution 12 , we measured not the palatal area, but its craniocaudal length and anteroposterior dimension. The former was similar in both sexes; however, the anteroposterior dimension of the soft palate (the palatal "thickness") was found to be greater in men.…”

Section: Discussionmentioning

confidence: 99%

Pharyngeal Dimensions in Healthy Men and Women

Daniel

Lorenzi

Leite

et al. 2007

Clinics

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Daniel MM, Lorenzi MC, Leite C da C, Lorenzi-Filho G. Pharyngeal dimensions in healthy men and women. Clinics. 2007; 62(1):5-10. INTRODUCTION:Epidemiological studies reveal a high male prevalence of obstructive sleep apnea syndrome. A possible explanation for this male predominance is the existence of anatomical differences in the upper airway between men and women. METHODS:The upper airways of 10 male and 10 female healthy volunteers were prospectively evaluated by magnetic resonance imaging. Anatomical pharyngeal and column cross-sectional linear measurements were made in sagittal T1 and axial T1 and T2 weighted fast spin-echo images. RESULTS: Men had significantly greater mean sagittal pharyngeal structural dimensions compared to women for all structures with the exception of the craniocaudal length of the soft palate and the thickness of the submentonian fat. In contrast, crosssectional linear dimensions were similar in men and women with the exception of the laterolateral tongue length, which was greater in men. All mean linear measurements of the pharyngeal air column were similar in men and women at all studied levels. CONCLUSIONS: Men and women present pharyngeal air columns with similar dimensions, but in women this column is surrounded by smaller structures, which might imply a smaller effort to keep its patency. Our data suggest the existence of an anatomical protective factor in women against the upper airway collapse.

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Section: Discussionmentioning

confidence: 99%

Pharyngeal Dimensions in Healthy Men and Women

Daniel

Lorenzi

Leite

et al. 2007

Clinics

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“…Previous studies present periodic breathing (PB) during sleep or wakefulness as a powerful predictor of poor prognosis in patients with CHF [3]. Periodic breathing patterns can be classified into ventilation with apnea, commonly known as Cheyne Stokes respiration (CSR), or ventilation without apnea [4], [5]. Various studies report a PB prevalence as high as 70% in CHF patients [6].…”

Section: Introductionmentioning

confidence: 99%

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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“…The CHF is associated with major abnormalities of autonomic cardiovascular control, and this group of patients often develop breathing anomalies such as various forms of oscillatory breathing patterns characterized by rises and falls in ventilation. Periodic breathing (PB) patterns can be classified into ventilation with apnea, known as Cheyne-Stokes respiration (CSR), and ventilation without apnea [3], [4]. PB has a prevalence as high as 70% in CHF patients [5], and is associated with increased mortality [6], especially in CSR patients [7], [8].…”

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confidence: 99%

Correntropy-Based Spectral Characterization of Respiratory Patterns in Patients With Chronic Heart Failure

Garde

Sörnmo

Jané

et al. 2010

IEEE Trans. Biomed. Eng.

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Abstract-A correntropy-based technique is proposed for the characterization and classification of respiratory flow signals in chronic heart failure (CHF) patients with periodic or nonperiodic breathing (PB or nPB, respectively) and healthy subjects. The correntropy is a recently introduced, generalized correlation measure whose properties lend themselves to the definition of a correntropybased spectral density (CSD). Using this technique, both respiratory and modulation frequencies can be reliably detected at their original positions in the spectrum without prior demodulation of the flow signal. Single-parameter classification of respiratory patterns is investigated for three different parameters extracted from the respiratory and modulation frequency bands of the CSD, and one parameter defined by the correntropy mean. The results show that the ratio between the powers in the modulation and respiratory frequency bands provides the best result when classifying CHF patients with either PB or nPB, yielding an accuracy of 88.9%. The correntropy mean offers excellent performance when classifying CHF patients versus healthy subjects, yielding an accuracy of 95.2% and discriminating nPB patients from healthy subjects with an accuracy of 94.4%.

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Cheyne-Stokes Respiration in Patients With Congestive Heart Failure: Causes and Consequences

Cited by 64 publications

References 78 publications

Pharyngeal Dimensions in Healthy Men and Women

Pharyngeal Dimensions in Healthy Men and Women

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

Correntropy-Based Spectral Characterization of Respiratory Patterns in Patients With Chronic Heart Failure

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