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Heart Rate Variability and cardiovascular disease

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https://www.readbyqxmd.com/read/28431533/effect-of-a-16-week-bikram-yoga-program-on-heart-rate-variability-and-associated-cardiovascular-disease-risk-factors-in-stressed-and-sedentary-adults-a-randomized-controlled-trial
#1
Zoe L Hewett, Kate L Pumpa, Caroline A Smith, Paul P Fahey, Birinder S Cheema
BACKGROUND: Chronic activation of the stress-response can contribute to cardiovascular disease risk, particularly in sedentary individuals. This study investigated the effect of a Bikram yoga intervention on the high frequency power component of heart rate variability (HRV) and associated cardiovascular disease (CVD) risk factors (i.e. additional domains of HRV, hemodynamic, hematologic, anthropometric and body composition outcome measures) in stressed and sedentary adults. METHODS: Eligible adults were randomized to an experimental group (n = 29) or a no treatment control group (n = 34)...
April 21, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28419371/sleep-a-window-into-autonomic-control-in-children-born-preterm-and-growth-restricted
#2
Stephanie R Yiallourou, Euan M Wallace, Christie Whatley, Alexsandria Odoi, Samantha Hollis, Aidan J Weichard, Jayan Shivanandhan Muthusamy, Suraj Varma, James Cameron, Om Narayan, Rosemary Sc Horne
Study Objectives: Preterm birth and fetal growth restriction (FGR) are both associated with risk of hypertension in adulthood. Mechanisms leading to this pathology are unclear. In children aged 5-12 years, who were born preterm and FGR, we used sleep as a tool to assess autonomic control with assessment of cardiovascular structure and function. Methods: 18 children born preterm and FGR, 15 born preterm with appropriate birth weights (AGA) and 20 AGA term-born children were studied...
April 17, 2017: Sleep
https://www.readbyqxmd.com/read/28403949/racial-differences-in-circulating-levels-of-the-soluble-receptor-for-advanced-glycation-endproducts-in-middle-aged-and-older-adults
#3
Tina E Brinkley, Xiaoyan Leng, Barbara J Nicklas, Stephen B Kritchevsky, Jingzhong Ding, Dalane W Kitzman, W Gregory Hundley
BACKGROUND: Low levels of the soluble receptor for advanced glycation endproducts (sRAGE) have been implicated in a number of chronic diseases. Previous studies indicate that sRAGE levels are ~30% lower in Blacks compared to Whites. However, the reasons for these differences are unclear. PURPOSE: We aimed to identify predictors of circulating sRAGE biomarkers among Black and White adults at high cardiac risk. METHODS: Serum levels of total sRAGE, endogenous secretory RAGE (esRAGE), carboxymethyl-lysine (CML, a major RAGE ligand), and their ratios were measured in 99 Blacks and 454 Whites...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28394772/obstructive-sleep-apnea-increases-systolic-and-diastolic-blood-pressure-variability-in-hypertensive-patients
#4
Jing Shi, Jingyan Piao, Bin Liu, Yujiao Pan, Yongtai Gong, Xianzhu Deng, Weiyan Sun, Shuang Lu, Yue Li
OBJECTIVE: Obstructive sleep apnea (OSA) has been identified as the most common secondary contributing factor for the development and worsening of hypertension. However, the underlying relationships between blood pressure variability (BPV) and OSA are still not very clear. Therefore, we investigated the influences of OSA on BPV in hypertensive patients and explored the potential pathophysiologic mechanisms. PARTICIPANTS AND METHODS: Ambulatory blood pressure (BP) monitoring was carried out and polysomnography was performed to detect sleep apnea...
April 7, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28387685/investigation-of-heart-rate-variability-of-patients-undergoing-coronary-artery-bypass-grafting-cabg
#5
A Hossen, D Jaju, M Al-Abri, H Al-Sabti, M Mukaddirov, M Hassan, K Al-Hashmi
BACKGROUND: Myocardial revascularization by coronary artery bypass grafting (CABG) is an effective measure for reducing symptoms and mortality in patients with unstable or severe coronary artery disease (CAD). Autonomic function can be estimated non-invasively using heart rate variability (HRV). HRV of patients undergoing CABG is investigated before and after CABG using a soft-decision wavelet based spectral analysis. OBJECTIVE: The main purpose of this work is to evaluate non-invasively HRV in patients undergoing CABG before operation; and to monitor the status of patients through HRV investigation on day 6 and day 30 after the CABG operation...
2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28381400/association-of-plasma-7-ketocholesterol-with-cardiovascular-outcomes-and-total-mortality-in-patients-with-coronary-artery-disease
#6
Jiayi Song, Duan Wang, Hongen Chen, Xiuwei Huang, Yuan Zhong, Nan Jiang, Chaogang Chen, Min Xia
Rationale: 7-Ketocholesterol (7-KC), a form of cholesterol oxidation product, plays an essential role in the atherogenesis in animal models. Objective: We sought to determine the association of circulating 7-KC with clinical cardiovascular outcomes and total mortality in patients with stable coronary artery disease (CAD). Methods and Results: We measured the plasma 7-KC levels by high performance liquid chromatography in a prospective cohort study of 1016 patients (mean age 63.2 years, male 61.1%) with stable CAD who were recruited from December 2008 to December 2011, and followed up for a median of 4...
April 5, 2017: Circulation Research
https://www.readbyqxmd.com/read/28380134/quality-of-life-score-as-a-predictor-of-death-in-dogs-with-degenerative-mitral-valve-disease
#7
Célia M C Strunz, Mário Marcondes-Santos, Julio Yoshio Takada, Fernanda S Fragata, Antônio de Pádua Mansur
Background: The knowledge of the variables predicting mortality is important in clinical practice and for therapeutic monitoring in mitral valve disease. Objectives: To determine whether a quality of life score evaluated with the Functional Evaluation of Cardiac Health questionnaire would predict mortality in dogs with degenerative mitral valve disease (DMVD). Methods: Thirty-six client-owned dogs with mitral valve disease underwent clinical, laboratory, and echocardiographic evaluations at baseline and were monitored for 6 months...
March 30, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28379800/body-weight-fluctuations-and-outcomes-in-coronary-disease
#8
Sripal Bangalore, Rana Fayyad, Rachel Laskey, David A DeMicco, Franz H Messerli, David D Waters
Background Body-weight fluctuation is a risk factor for death and coronary events in patients without cardiovascular disease. It is not known whether variability in body weight affects outcomes in patients with coronary artery disease. Methods We determined intraindividual fluctuations in body weight from baseline weight and follow-up visits and performed a post hoc analysis of the Treating to New Targets trial, which involved assessment of the efficacy and safety of lowering low-density lipoprotein cholesterol levels with atorvastatin...
April 6, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28376102/the-association-between-autonomic-dysfunction-inflammation-and-atherosclerosis-in-men-under-investigation-for-carotid-plaques
#9
Marcus A Ulleryd, Ulrica Prahl, Johannes Börsbo, Caroline Schmidt, Staffan Nilsson, Göran Bergström, Maria E Johansson
BACKGROUND: Autonomic dysfunction is a risk factor for cardiovascular disease (CVD), however, the exact mechanism linking autonomic dysfunction to cardiovascular disease is not known. In this study we hypothesized that autonomic dysfunction increases inflammation, which subsequently accelerates atherosclerosis. The aim of the current study was to investigate the association between autonomic tone, inflammation and atherosclerosis. METHODS: 124 men under investigation for carotid atherosclerosis were examined for autonomic function (heart rate variability; HRV and baroreflex sensitivity; BRS), inflammatory markers (white blood cell count; WBCC and C-reactive protein; CRP) and degree of carotid atherosclerosis...
2017: PloS One
https://www.readbyqxmd.com/read/28375677/cardiopulmonary-exercise-testing-in-adult-congenital-heart-disease
#10
Valentina Mantegazza, Anna Apostolo, Alfred Hager
Recently, the number of patients with congenital heart diseases reaching adulthood has been progressively increasing in developed countries and new issues are emerging regarding them: the evaluation of their capacity to cope with physical activity, and whether this knowledge can be used to optimize medical management. A symptom-limited cardiopulmonary exercise test has proven to be an essential tool because it can objectively evaluate the functional cardiovascular capacity of these patients, identify the pathological mechanisms of the defect (circulatory failure, shunts, pulmonary hypertension) and help prescribe an individualized rehabilitation program when needed...
April 4, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28373588/vascular-stiffness-in-children-with-chronic-kidney-disease
#11
Jonathan D Savant, Aisha Betoko, Kevin E C Meyers, Mark Mitsnefes, Joseph T Flynn, Raymond R Townsend, Larry A Greenbaum, Allison Dart, Bradley Warady, Susan L Furth
Carotid-femoral pulse wave velocity (cfPWV) is a measure of arterial stiffness associated with cardiovascular events in the general population and in adults with chronic kidney disease. However, few data exist regarding cfPWV in children with chronic kidney disease. We compared observed cfPWV assessed via applanation tonometry in children enrolled in the CKiD cohort study (Chronic Kidney Disease in Children) to normative data in healthy children and examined risk factors associated with elevated cfPWV. cfPWV Z score for height/gender and age/gender was calculated from and compared with published pediatric norms...
May 2017: Hypertension
https://www.readbyqxmd.com/read/28367952/b-vitamin-supplementation-mitigates-effects-of-fine-particles-on-cardiac-autonomic-dysfunction-and-inflammation-a-pilot-human-intervention-trial
#12
Jia Zhong, Letizia Trevisi, Bruce Urch, Xinyi Lin, Mary Speck, Brent A Coull, Gary Liss, Aaron Thompson, Shaowei Wu, Ander Wilson, Petros Koutrakis, Frances Silverman, Diane R Gold, Andrea A Baccarelli
Ambient fine particle (PM2.5) pollution triggers acute cardiovascular events. Individual-level preventions are proposed to complement regulation in reducing the global burden of PM2.5-induced cardiovascular diseases. We determine whether B vitamin supplementation mitigates PM2.5 effects on cardiac autonomic dysfunction and inflammation in a single-blind placebo-controlled crossover pilot trial. Ten healthy adults received two-hour controlled-exposure-experiment to sham under placebo, PM2.5 (250 μg/m(3)) under placebo, and PM2...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28366517/risks-of-adverse-events-in-advanced-ckd-the-chronic-renal-insufficiency-cohort-cric-study
#13
Morgan E Grams, Wei Yang, Casey M Rebholz, Xue Wang, Anna C Porter, Lesley A Inker, Edward Horwitz, James H Sondheimer, L Lee Hamm, Jiang He, Matthew R Weir, Bernard G Jaar, Tariq Shafi, Lawrence J Appel, Chi-Yuan Hsu
BACKGROUND: People with advanced chronic kidney disease are at risk for the development of end-stage renal disease (ESRD), but also many other adverse outcomes, including cardiovascular disease (CVD) events and death. Determination of risk factors that explain the variability in prognosis and timing of these adverse outcomes can aid patient counseling and medical decision making. STUDY DESIGN: Prospective research cohort. SETTING & PARTICIPANTS: 1,798 participants with estimated glomerular filtration rates (eGFRs)<30mL/min/1...
March 30, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28331926/cessation-of-oral-anticoagulation-is-an-important-risk-factor-for-stroke-and-mortality-in-atrial-fibrillation-patients
#14
José Miguel Rivera-Caravaca, Vanessa Roldán, María Asunción Esteve-Pastor, Mariano Valdés, Vicente Vicente, Gregory Y H Lip, Francisco Marín
Oral anticoagulation (OAC) is highly effective preventing stroke and mortality in AF, but withdrawal is common in the elderly, when high bleeding risk and when are difficulties achieving an optimal time in therapeutic range (TTR). We analysed the rate of OAC cessation, predisposing factors to cessation and the relation to clinical outcomes in a large 'real world' cohort of AF patients over a long follow-up period. Consecutive non-valvular AF outpatients clinically stables for six months were recruited. Rates of cardiovascular events, major bleeding and mortality were recorded and related to OAC cessation...
March 23, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28330412/early-asymmetric-cardio-cerebral-causality-and-outcome-after-severe-traumatic-brain-injury
#15
Lei Gao, Peter Smieleweski, Marek Czosnyka, Ari Ercole
The brain and heart are two vital systems in health and disease, increasingly recognised as a complex, interdependent network with constant information flow in both directions. After severe traumatic brain injury (TBI), the causal, directed interactions between the brain, heart and autonomic nervous system have not been well established. Novel methods are needed to probe unmeasured, potentially prognostic information in complex biological networks that are not revealed via traditional means. In this study, we examined potential bi-directional causality between intracranial pressure (ICP), mean arterial pressure (MAP) and heart rate (HR) and its relationship to mortality in a 24-hour period early after TBI...
March 23, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28325020/socioeconomic-status-age-and-heart-rate-variability-in-a-bangladeshi-community
#16
Nishat E-Sharmin Trisha, Herbert F Jelinek, Mika P Tarvainen, David J Cornforth, Dewan S Alam, Megan Smith
Socioeconomic status (SES) is a risk factor for cardiovascular disease (CVD) and either low or high heart rate variability (HRV) at rest has been shown to predict cardiovascular morbidity and mortality. The study investigated the extent HRV features can predict SES. Four hundred and twenty eight people were randomly selected from the commercial districts (high SES) and slum areas (low SES) within Dhaka city. Demographic, clinical, and HRV features were recorded. Of the clinical variables age, waist circumference and diastolic blood pressure (p<;0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323625/the-effects-of-stretching-training-on-cardiac-autonomic-function-in-obese-postmenopausal-women
#17
Alexei Wong, Marcos Sanchez-Gonzalez, Roy Kalfon, Stacey Alvarez-Alvarado, Arturo Figueroa
Context • Menopause and obesity are associated with autonomic dysfunction. Unconventional exercise modalities that include an important flexibility component seem to improve cardiac autonomic function by lowering sympathetic tone and increasing vagal modulation of the heart rate (HR). Yet clear evidence of the effects of stretching training (ST) on cardiac autonomic modulation is limited. Objective • The present study intended to examine the effects of ST on HR variability (HRV) and flexibility in obese postmenopausal women...
March 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28320892/sepiapterin-reductase-gene-disrupted-mice-suffer-from-hypertension-with-fluctuation-and-bradycardia
#18
Chiho Sumi-Ichinose, Yui Suganuma, Taiki Kano, Noriko Ihira, Hiroko Nomura, Kazuhisa Ikemoto, Tadayoshi Hata, Setsuko Katoh, Hiroshi Ichinose, Kazunao Kondo
(6R)-l-erythro-5,6,7,8-Tetrahydrobiopterin (BH4) is an essential cofactor for monoamine and nitric oxide (NO) production. Sepiapterin reductase (SPR) catalyzes the final step in BH4 biosynthesis. We analyzed the cardiovascular function of adult Spr gene-disrupted (Spr(-/-)) mice for the first time. After weaning, Spr(-/-) mice suffered from hypertension with fluctuation and bradycardia, while the monoamine contents in these mice were less than 10% of those in the wild-type mice as a result of BH4 depletion...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28315879/heart-rate-variability-predicts-major-adverse-cardiovascular-events-and-hospitalization-in-maintenance-hemodialysis-patients
#19
Jiun-Chi Huang, I-Ching Kuo, Yi-Chun Tsai, Jia-Jung Lee, Lee-Moay Lim, Szu-Chia Chen, Yi-Wen Chiu, Jer-Ming Chang, Hung-Hun Chen
BACKGROUND/AIMS: Heart rate variability (HRV) has been linked to mortality in maintenance hemodialysis (HD) patients, but it is less clear whether HRV is associated with major adverse cardiovascular events (MACEs) and hospitalization. METHODS: This study enrolled 179 maintenance HD patients. HRV was measured to assess its prognostic significance in relation to MACEs and hospitalization. RESULTS: During the follow-up period of 33.3 ± 6.7 months, 36 (20...
March 17, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/28315565/heart-rate-variability-in-normal-weight-patients-with-polycystic-ovary-syndrome
#20
Celal Kilit, Türkan Paşalı Kilit
OBJECTIVE: Polycystic ovary syndrome (PCOS) is an endocrine disease closely related to several risk factors of cardiovascular disease. Obese women with PCOS show altered autonomic modulation. The results of studies investigating cardiac autonomic functions of normal-weight women with PCOS are conflicting. The aim of the study was to assess the reactivity of cardiac sympathovagal balance in normal-weight women with PCOS by heart rate variability analysis. METHODS: We examined the heart rate variability in 60 normal-weight women with PCOS and compared them with that in 60 age-matched healthy women having a similar metabolic profile...
March 9, 2017: Anatolian Journal of Cardiology
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