Diminished heart beat non-stationarities in congestive heart failure

Camargo, Sabrina; Riedl, Maik; Anteneodo, Celia; Kurths, Jürgen; Wessel, Niels

doi:10.3389/fphys.2013.00107

Cited by 1 publication

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As we have shown in a previous work [17] , congestive heart failure is associated with a decreased variance of the segments in the time series of RR-intervals. In the present study, patients with such kind of diseases were not included, meaning that all the 26 patients considered did not suffer from heart rhythm disturbances.…”

Section: Discussionsupporting

confidence: 74%

See 1 more Smart Citation

Sleep Apnea-Hypopnea Quantification by Cardiovascular Data Analysis

et al. 2014

Self Cite

View full text Add to dashboard Cite

Sleep disorders are a major risk factor for cardiovascular diseases. Sleep apnea is the most common sleep disturbance and its detection relies on a polysomnography, i.e., a combination of several medical examinations performed during a monitored sleep night. In order to detect occurrences of sleep apnea without the need of combined recordings, we focus our efforts on extracting a quantifier related to the events of sleep apnea from a cardiovascular time series, namely systolic blood pressure (SBP). Physiologic time series are generally highly nonstationary and entrap the application of conventional tools that require a stationary condition. In our study, data nonstationarities are uncovered by a segmentation procedure which splits the signal into stationary patches, providing local quantities such as mean and variance of the SBP signal in each stationary patch, as well as its duration . We analysed the data of 26 apneic diagnosed individuals, divided into hypertensive and normotensive groups, and compared the results with those of a control group. From the segmentation procedure, we identified that the average duration , as well as the average variance , are correlated to the apnea-hypoapnea index (AHI), previously obtained by polysomnographic exams. Moreover, our results unveil an oscillatory pattern in apneic subjects, whose amplitude is also correlated with AHI. All these quantities allow to separate apneic individuals, with an accuracy of at least . Therefore, they provide alternative criteria to detect sleep apnea based on a single time series, the systolic blood pressure.

show abstract

Section: Discussionsupporting

confidence: 74%

“…(See Refs. [16] , [17] for further details). We performed the KS-segmentation with , the minimal segment length, and .…”

Section: Methodsmentioning

confidence: 99%