A5069717353- Heart Rate Variability and Autonomic Control
- Non-Invasive Vital Sign Monitoring
- Cardiovascular Syncope and Autonomic Disorders
- Cardiovascular and exercise physiology
- ECG Monitoring and Analysis
- Neuroscience of respiration and sleep
- Cardiovascular Health and Disease Prevention
- Birth, Development, and Health
- Pregnancy and preeclampsia studies
- Blood Pressure and Hypertension Studies
- Meat and Animal Product Quality
- Biomedical and Engineering Education
- Food composition and properties
- Phonocardiography and Auscultation Techniques
- Proteins in Food Systems
- EEG and Brain-Computer Interfaces
- Neonatal and fetal brain pathology
- Hemodynamic Monitoring and Therapy
- Quality and Safety in Healthcare
- Fault Detection and Control Systems
- Food Chemistry and Fat Analysis
- HIV/AIDS oral health manifestations
- Oral and gingival health research
- Multiple and Secondary Primary Cancers
- Inhalation and Respiratory Drug Delivery
Universidad Autónoma Metropolitana
2013-2024
Instituto Nacional de Cardiología
2015
Secretaria de Salud
2010
Colorado State University
2002
In studies of autonomic regulation during orthostatic challenges only a few nonlinear methods have been considered without investigating the effect gender in young controls. Especially, temporal development has not yet explicitly analyzed using short-term segments supine position, transition and phase (OP). this study, analysis cardiovascular respiratory time series was performed to investigate how indices are dynamically changing with respect challenges. The carried out shifted throughout...
The effect of an orthostatic stress on cardiovascular and respiratory complexity was investigated to detect impaired autonomic regulation in patients with vasovagal syncope (VVS). A total 16 female 12 age-matched healthy subjects were enrolled a passive 70° head-up tilt test. Also, male study gender differences. Analysis performed dynamically using various short-term (5 min) windows shifted by 1 min as well 20 phase (OP) evaluate local global complexity. Complexity determined over multiple...
An LMS-based algorithm to monitor fetal and maternal heart rate in real time was implemented evaluated on a development platform. Hardware has three modules: dsPIC30F digital signal controller, low-noise analog front end storage stage. They were using on-chip debugging tools patient simulator. Algorithm performance tested simulation data. Other measures like process run-times power consumption, analyzed evaluate the design feasibility. Dataset conformed by 25 annotated records from different...
Abstract Linear dynamic analysis of cardiovascular and respiratory time series was performed in healthy subjects with respect to gender by shifted short-term segments throughout a head-up tilt (HUT) test. Beat-to-beat intervals (BBI), systolic (SYS) diastolic (DIA) blood pressure interval (RESP) were acquired 14 men 15 women. In domain (TD), the descending slope auto-correlation function (ACF) (BBI_a31cor) more pronounced women than (p<0.05) during HUT test considerably steeper...
In this study, the linear method of extended partial directed coherence (ePDC) was applied to establish temporal dynamic behavior cardiovascular and cardiorespiratory interactions during orthostatic stress at a 70° head-up tilt (HUT) test on young age-matched healthy subjects patients with intolerance (OI), both male female. Twenty 5-min windows were used analyze minute-wise progression from 5 min in supine position (baseline, BL) until 18 phase (OP) without including pre-syncopal phases....
Gender related-differences in the autonomic regulation of cardiovascular and cardiorespiratory systems have been studied mainly by hemodynamic responses during different physical stressors. In this study, influence gender on response to an orthostatic challenge was investigated obtaining coupling using nonlinear technique known as joint symbolic dynamics (JSD) representation. This study includes 24 healthy young subjects. Males (N=12) age-matched females were enrolled a head-up tilt (HUT)...
The aim of this study was to investigate the effect head-up tilt (HUT) test on male and female young patients, diagnosed with orthostatic intolerance (OI), in comparison healthy subjects. Twenty seven OI patients (21 women, 6 men) 26 age-matched subjects (13 13 were enrolled a 70° HUT test. In addition hemodynamic variables, cardiovascular respiratory parameters determined using linear nonlinear methods analyze heart rate (HRV) blood pressure variability (BPV). During complete test, HRV...
The gradual shift of cardiac autonomic regulation toward sympathetic predominance and vagal withdrawal during graded head-up tilt test in young controls has been demonstrated by parameters from symbolic dynamics obtained short-term heart rate variability (HRV) analysis. In this study, the influence gender vasovagal syncope (VVS) on response to an orthostatic challenge was investigated HRV analysis using (STSD). This study included 24 healthy subjects (12 males; 12 age-matched females) 16...
To compare the relationships between heart period and root mean square of successive differences for exercise recovery, these parameters were obtained in eight subjects during three one-minute sub-maximal workloads cycle first minutes using a 25 second sliding window. In most subjects, at variables reached values over those resting condition. Individual semi-log log-log regressions estimated regression both stages compared by paired t-test. All correlations very strong, higher stage,...
In this work, a graphical method to study cardiovascular coupling, called delta space plot analysis (DSPA), was introduced. The representation is susceptible be parameterized in shape and orientation. usefulness of technique studied on data from patients with vasovagal syncope (VVS) controls. included 15 female diagnosed VVS 11 age-matched healthy subjects. All subjects were enrolled head-up tilt (HUT) test, breathing normally, including 5 minutes supine position (baseline) 18 70°...
Time-varying autoregressive modeling may consider the driving noise variance as a constant. In this work, properties of heart rate variability, with different stationary physiological conditions (resting in supine and sitting; exercise) are obtained. The effect constant consideration for ramp exercise recovery (a nonstationary condition) is also evaluated by comparison time-varying absolute spectral parameters obtained parametric estimation, allowing or not variance, non-parametric...