The hypothesis that the Poincaré plot indexes of heart rate variability (HRV) detect dynamic changes after haemodialysis (HD) over HRV in haemodynamically stable chronic renal failure (CRF) patients was examined. Minor axis (SD1), major (SD2) and SD1/SD2 ratio were compared against standard time frequency domain, a group healthy subjects CRF before HD. These estimated from plots reconstructed with lags one, two four heartbeats. surrogate data analysis technique applied order to discern if...

Abstract Introduction At present, there is neither a laboratory test nor an imaging technique able to differentiate people with fibromyalgia (FM) from healthy controls. This lack of objective biomarker has hampered FM recognition and research. Heart rate variability (HRV) analyses provide quantitative marker autonomic nervous system activity. Nighttime stable period in which most are resting. Sleep modulated by Sleeping problems prominent FM. The objectives this study are: 1) explore...

Background: The utility of L-arginine and L-citrulline in treatment arterial hypertension by increasing vascular oxide nitric availability has been demonstrated. Photoplethysmography, a simple low-cost optical technique, makes it possible to assess function detect changes blood flow, pulse swelling the microvascular tissular space. aim study was evaluate effect supplementation on functional class, ejection fraction peripheral flow patients with systolic heart failure. Methods: Thirty-five...

Objective: To characterize the multifractal behavior of beat to heart-period or RR fluctuations in fibromyalgia patients (FM) comparison with healthy-matched subjects. Methods: Multifractral detrended fluctuation analysis (MDFA) was used study multifractality heartbeat times-series from 30 female healthy subjects and during day night periods.The changes as derived magnitude sign these were also assessed. Results: The dynamics showed a broad spectrum. By contrast, noticeable decrease...

In this study, the spatial distribution of PM2.5 air pollution in Mexico City from 37 personal exposures was modeled. Meteorological, demographic, geographic, and social data were also included. Geographic information systems (GIS), analysis, Land-Use Regression (LUR) used to generate final predictive model map which revealed two areas with very high concentrations (up 109.3 µg/m3) more lower (between 72 86.5 (p < 0.05). These results illustrate an overview trend relation human activity...

Power spectral analysis of heart rate variability (HRV) offers a possibility to non-invasively quantify autonomic cardiac regulation. The technique splits the spectrum HRV into high frequency (HF), low (LF) and very-low (VLF) bands, relates their power content parasympathetic outflow, sympathetic hormonal factors as well thermoregulation, respectively. In this work, we applied on data from 20 end-stage renal disease (ESRD) patients estimate distribution in these three bands changes respect...

Bacillus thuringiensis (Bt) bacteria produce different pore forming toxins with insecticidal activity, including Cry and Vip3 proteins. While both cause insect death by pores in susceptible lepidopteran larval midgut cells, their mechanisms of action differ. The Vip3Aa protoxin adopts a tetramer-structure, where each monomer has five distinct domains. Upon proteolytic activation, the tetramer undergoes large conformational change syringe like structure that is ready for membrane insertion...

The kidneys are organs that can be severely impaired by metabolic syndrome (MS). This is characterized the association of various pathologies such as hypertension, dyslipidemia, and type-2 diabetes. Glycine, a nonessential amino acid, known to possess protective effects in kidney, decrease deterioration renal function reduction damage caused hypoxia. In rat model MS, effect glycine on cyclooxygenase (COX) pathway arachidonic acid (AA) metabolism was studied isolated perfused kidney. MS...

Metabolic syndrome is a health condition that increases the risk of heart diseases, diabetes, and stroke. The prognostic variables identify this have already been defined by World Health Organization (WHO), National Cholesterol Education Program Third Adult Treatment Panel (ATP III) as well International Diabetes Federation. According to these guides, there some symmetry among anthropometric classify abdominal obesity in people with metabolic syndrome. However, appear be more sensitive than...

Abstract: A model of baroreflex control blood pressure (BP) is proposed in terms a delay differential equation and this used to predict the adaptation short‐term cardiovascular chronic renal failure (CRF) patients. Cardiac pump dynamics are explored by means plots flow vs. mean BP. The parameters were determined from available data sensitivity analysis. predicts stable unstable equilibria close steady It shown that equilibrium point generates quasiperiodic solution with two main harmonics...

Introduction Systemic hypertension (HTN) is a common risk factor for cardiovascular disease. In Mexico, HTN prevalence has increased over time and currently 31%. Nonetheless, information about the country's incidence its associated factors scarce. Understanding this condition priority identifying scope of primary prevention. The main objective study to evaluate effect traditional non-traditional on in cohort healthy Mexico City residents under biannual follow-up 10 years. Methods analysis A...

Cardiovascular regulatory mechanisms that fail to compensate for ultrafiltration and cause hypovolemia during hemodialysis (HD) are not completely understood. This includes the interaction between autonomic nervous system biochemistry regulates blood pressure modulates cardiac activity vascular tone in response patients treated with HD. The objective was evaluate association of spectral indices heart rate variability (HRV) serum levels angiotensin II, 1-7, nitric oxide total antioxidant...

The scaling properties of heart rate variability data are reliable dynamical features to predict mortality and for the assessment cardiovascular risk. aim this manuscript was determine if properties, as provided by sign magnitude analysis, can be used differentiate between pathological changes those adaptations basically introduced modifications mean in distinct manoeuvres (active standing or hemodialysis treatment, HD), well clinical conditions (end stage renal disease, ESRD). We found that...

Cardiovascular variability (CVV) has been evaluated in patients with Parkinson's disease (PD) other countries and exhibit ethnic differences.We investigated heart rate (HRV) blood pressure (BPV) Mexican PD.We further compared HRV BPV between this group young healthy controls (YHC) order to estimate, for the first time our country, magnitude of difference. Twenty were examined. Time- frequency-domain CVV parameters studied during supine rest (SR), active standing (AS) controlled breathing....

We studied the effect of varying levels sex hormones, induced by ovariectomy and administration testosterone or estradiol, on aortic reactivity in female rats with metabolic syndrome (MS) a sucrose diet. Vasoreactivity rings, blood pressure, intra-abdominal fat, serum triglycerides, nitrates nitrites, TBARS were evaluated. Intact MS ovariectomized had higher BP than intact control (C) C, respectively; estradiol decreased but not C. Triglycerides fat both MS. modified surgery hormone...

The prevailing linear reductionist medical model seems unable to explain complex multisymptomatic illnesses such as fibromyalgia (FM) and similar maladies. Paradigms derived from the complexity theory may provide a coherent framework for these elusive illnesses. Along lines is proposal that FM represents degradation of our main adaptive system (the autonomic nervous system, ANS), in failed effort adjust hostile environment. Healthy systems have fractal structures. Heart rate fractal-like...