scholarly journals Return-to-Work Screening by Linear Discriminant Analysis of Heart Rate Variability Indices in Depressed Subjects

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5177
Author(s):  
Toshikazu Shinba ◽  
Keizo Murotsu ◽  
Yosuke Usui ◽  
Yoshinori Andow ◽  
Hiroshi Terada ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Discriminant Analysis ◽  
Return To Work ◽  
Linear Discriminant Analysis ◽  
Discriminant Function ◽  
Low Frequency ◽  
Linear Discriminant ◽  
Frequency Components ◽  
Returning To Work

Using a linear discriminant analysis of heart rate variability (HRV) indices, the present study sought to verify the usefulness of autonomic measurement in major depressive disorder (MDD) patients by assessing the feasibility of their return to work after sick leave. When reinstatement was scheduled, patients’ HRV was measured using a wearable electrocardiogram device. The outcome of the reinstatement was evaluated at one month after returning to work. HRV indices including high- and low-frequency components were calculated in three conditions within a session: initial rest, mental task, and rest after task. A linear discriminant function was made using the HRV indices of 30 MDD patients from our previous study to effectively discriminate the successful reinstatement from the unsuccessful reinstatement; this was then tested on 52 patients who participated in the present study. The discriminant function showed that the sensitivity and specificity in discriminating successful from unsuccessful returns were 95.8% and 35.7%, respectively. Sensitivity is high, indicating that normal HRV is required for a successful return, and that the discriminant analysis of HRV indices is useful for return-to-work screening in MDD patients. On the other hand, specificity is low, suggesting that other factors may also affect the outcome of reinstatement.

Effect of Acupuncture at Ht7 on Heart Rate Variability: An Exploratory Study

2015 ◽  
Vol 33 (1) ◽  
pp. 30-35 ◽  
Author(s):  
Huanlin Huang ◽  
Zheng Zhong ◽  
Junqi Chen ◽  
Yong Huang ◽  
Jixuan Luo ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Low Frequency ◽  
Sham Acupuncture ◽  
Acupuncture Group ◽  
Control Groups ◽  
Parasympathetic System ◽  
Registration Number ◽  
Frequency Components ◽  
Random Number Table

Objective To explore the effect of acupuncture at HT7 on heart rate variability (HRV) in healthy volunteers. Methods 120 subjects were divided into four groups using a random number table. The following groups of acupuncture interventions were used: HT7 verum acupuncture; HT7 non-penetrating sham acupuncture; acupuncture at a sham point; and no acupuncture. HRV was recorded 10 min before, during and after each stimulation using an Actiheart ECG recorder. Results The HT7 verum acupuncture group had higher very-low frequency, low frequency and high frequency components of HRV compared with the control groups during but not after acupuncture. The HT7 verum acupuncture group also had higher SD of normal intervals compared with the sham needling and no acupuncture control groups. Conclusions Our preliminary study suggests, subject to limitations, that acupuncture at HT7 could affect cardiac autonomic neural regulation in healthy subjects, manifest as increased HRV, most likely via the parasympathetic system. Trial Registration Number ChiCTR-TRC-08000302.

The Research on the EC Individual Credibility Based on Linear Discriminant Analytic Hierarchy Process

2011 ◽  
Vol 219-220 ◽  
pp. 112-115
Author(s):  
Zun Qi Yang ◽  
Hai Lin
Keyword(s):  
Discriminant Analysis ◽  
Analytic Hierarchy Process ◽  
Linear Discriminant Analysis ◽  
Discriminant Function ◽  
Linear Discriminant Function ◽  
Simulation Test ◽  
Analytic Hierarchy ◽  
Linear Discriminant ◽  
Hierarchy Process

The paper gives the linear discriminant function (LDF) based on the theory of linear discriminant analysis (LDA) combined with computing weights of the different indicators by analytic hierarchy process (AHP) to predict a new e-commerce customer’s individual credibility level and analyzes the result of a simulation test to justify the theory in this research.

scholarly journals CHEMOMETRIC-BASED ELECTRONIC NOSE APPLICATION TO PORK OIL AND OLIVE OIL USING THE ODOR PATTERN CLASSIFICATIONS

2018 ◽  
Vol 10 (2) ◽  
pp. 55
Author(s):  
Imam Tazi ◽  
Muthmainnah Muthmainnah ◽  
Suyono Suyono ◽  
Avin Ainur
Keyword(s):  
Discriminant Analysis ◽  
Olive Oil ◽  
Linear Discriminant Analysis ◽  
Pattern Classification ◽  
Discriminant Function ◽  
Electronic Nose ◽  
Chemical Sensors ◽  
Data Retrieval ◽  
Output Data ◽  
Linear Discriminant

<p class="abstrak">A chemometric-based electronic nose has designed for analyzing pork oil and olive oil  using the odor pattern classifications. The electronic nose (e-nose) built from a combination of several chemical sensors derived from a semiconductor. The data retrieval was done by vaporizing the sample, then being captured by the sensor and identified by the electronic nose (e-nose). The output data from the electronic nose is the voltage released by each sensor. The analyzed samples were 100% olive oil, 100% pork oil and a combination of olive oil and pork oil with a ratio of 50%: 50%. The result of pattern classification using linear discriminant analysis (LDA) method shows that each sample is clustered well with the percentage of first discriminant function value is 87,9% and second discriminant function is 12,1%.</p>

scholarly journals Association between heart rate, heart rate variability, cortisol, glucose and electrolytes in healthy newborn calves

2019 ◽  
Vol 71 (6) ◽  
pp. 1922-1928
Author(s):  
D.A.C. Quevedo ◽  
M.L.G. Lourenço ◽  
C.A.D. Bolaños ◽  
R.K. Takahira ◽  
E. Oba ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Strong Correlation ◽  
Plasma Concentrations ◽  
Low Frequency ◽  
Positive Association ◽  
Blood Levels ◽  
Healthy Newborn ◽  
Frequency Components ◽  
Newborn Calves

ABSTRACT This study aims at evaluating the effects of electrolytes, glucose and cortisol levels over heart rate (HR) and heart rate variability (HRV) in healthy newborn calves. Seventeen healthy Holstein calves were evaluated during their first month of life, and the plasma concentrations of glucose, cortisol, calcium, magnesium, inorganic phosphorus, sodium and potassium were analyzed. HRV indexes were determined in the time and frequency domains through the analysis of neonatal electrocardiogram recordings. In the first day, low blood levels of phosphorus presented a strong correlation with the HR and the increased high-frequency components of HRV. The plasma concentrations of magnesium decreased significantly throughout the 35 days, revealing a positive association with a decreasing low-frequency components of HRV at day 28. There was a strong correlation between HR, HRV indexes, some plasma electrolytes, glucose and cortisol during the studied period. Variations in the concentrations and correlations observed may be attributed to the adaptive neonatal period in calves.

scholarly journals Association of autonomic dysfunction and clozapine

2001 ◽  
Vol 179 (2) ◽  
pp. 167-171 ◽  
Author(s):  
Hagit Cohen ◽  
Uri Loewenthal ◽  
Michael Matar ◽  
Moshe Kotler
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Psychiatric Patients ◽  
Low Frequency ◽  
Power Spectral Analysis ◽  
Rate Analysis ◽  
Power Spectral ◽  
Wide Range ◽  
Frequency Components ◽  
Heart Rate Analysis

BackgroundAntipsychotic medications cause a wide range of adverse effects and have been associated with sudden death in psychiatric patients.AimsTo supply power spectral analysis of heart rate variability as a tool to examine the arrythmogenic effects of neuroleptics.MethodHeart rate analysis was carried out in patients with schizophrenia on standard doses of neuroleptic monotherapy − 21 were on clozapine, 18 on haloperidol and 17 on olanzapine – and in 53 healthy subjects.ResultsPatients with schizophrenia on clozapine had significantly higher heart rate, lower heart rate variability and lower high-frequency and higher low-frequency components compared with patients on haloperidol or olanzapine and matched control subjects. Prolonged QTc intervals were more common in patients than controls.ConclusionsPatients treated with neuroleptic medications, especially clozapine, showed autonomic dysregulation and cardiac repolarisation changes. Physicians should be aware of this adverse reaction.

Coarse-graining spectral analysis: new method for studying heart rate variability

1991 ◽  
Vol 71 (3) ◽  
pp. 1143-1150 ◽  
Author(s):  
Y. Yamamoto ◽  
R. L. Hughson
Keyword(s):  
Heart Rate ◽  
Time Series ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
High Frequency ◽  
Low Frequency ◽  
Scale Invariant ◽  
Very Low Frequency ◽  
Frequency Components ◽  
Harmonic Components

Heart rate variability (HRV) spectra are typically analyzed for the components related to low- (less than 0.15 Hz) and high- (greater than 0.15 Hz) frequency variations. However, there are very-low-frequency components with periods up to hours in HRV signals, which might smear short-term spectra. We developed a method of spectral analysis suitable for selectively extracting very-low-frequency components, leaving intact the low- and high-frequency components of interest in HRV spectral analysis. Computer simulations showed that those low-frequency components were well characterized by fractional Brownian motions (FBMs). If the scale invariant, or self-similar, property of FBMs is considered a new time series (x′) was constructed by sampling only every other point (course graining) of the original time series (x). Evaluation of the cross-power spectra between these two (Sxx′) showed that the power of the FBM components was preserved, whereas that of the harmonic components vanished. Subtraction of magnitude of Sxx from the autopower spectra of the original sequence emphasized only the harmonic components. Application of this method to HRV spectral analyses indicated that it might enable one to observe more clearly the low- and high-frequency components characteristic of autonomic control of heart rate.

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