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Heart Rate Variability and cardiovascular disease

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https://www.readbyqxmd.com/read/28646812/oral-consumption-of-vitamin-k2-for-8-weeks-associated-with-increased-maximal-cardiac-output-during-exercise
#1
Brian K McFarlin, Andrea L Henning, Adam S Venable
Background • Vitamin K1 and K2 are not typically common in a Western diet because they are found in a variety of fermented foods. Vitamin K2 in particular has been demonstrated to restore mitochondrial function and has a key role in production of mitochondrial adenosine triphosphate. Thus, it is reasonable to speculate that dietary supplementation with vitamin K2 could increase the function of muscle with high mitochondrial content (ie, skeletal and cardiac muscle). Objective • The purpose of this study was to determine if 8 wk of dietary supplementation with Vitamin K2 could alter cardiovascular responses to a graded cycle ergometer test...
July 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28645730/the-relation-of-digital-vascular-function-to-cardiovascular-risk-factors-in-african-americans-using-digital-tonometry-the-jackson-heart-study
#2
Eric E McClendon, Solomon K Musani, Tandaw E Samdarshi, Sushant Khaire, Donny Stokes, Naomi M Hamburg, Koby Sheffy, Gary F Mitchell, Herman R Taylor, Emelia J Benjamin, Ervin R Fox
Digital vascular tone and function, as measured by peripheral arterial tonometry (PAT), are associated with cardiovascular risk and events in non-Hispanic whites. There are limited data on relations between PAT and cardiovascular risk in African-Americans. PAT was performed on a subset of Jackson Heart Study participants using a fingertip tonometry device. Resting digital vascular tone was assessed as baseline pulse amplitude. Hyperemic vascular response to 5 minutes of ischemia was expressed as the PAT ratio (hyperemic/baseline amplitude ratio)...
June 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28642732/autonomic-function-impairment-and-brain-perfusion-deficit-in-parkinson-s-disease
#3
Wei-Che Lin, Pei-Chin Chen, Chih-Cheng Huang, Nai-Wen Tsai, Hsiu-Ling Chen, Hung-Chen Wang, Kun-Hsien Chou, Meng-Hsiang Chen, Yi-Wen Chen, Cheng-Hsien Lu
INTRODUCTION: Autonomic disorders have been recognized as important Parkinson's disease (PD) components. Some vulnerable structures are related to the central autonomic network and have also been linked to autonomic function alterations. The aims of the study are to evaluate the severity of the autonomic dysfunction and the cortical hypoperfusion using arterial spin labeling (ASL) MRI. And then, possible relationships of significant between-group differences in perfusion pattern to clinical variables and autonomic functions were examined to determine the pharmaceutical effects of dopaminergic treatment on cerebral blood flow (CBF) in patients with PD...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28622947/discontinuation-and-non-publication-of-clinical-trials-in-cardiovascular-medicine
#4
Alistair J Roddick, Fiona T S Chan, James D Stefaniak, Sean L Zheng
BACKGROUND: Appropriate dissemination of clinical data is crucial for minimising bias. Despite this, high rates of study discontinuation and non-publication have been reported among clinical trials. Cardiovascular medicine receives a substantial proportion of academic funding; however, predictors of non-publication among cardiovascular trials are not well-established. METHODS: The National Clinical Trials database was searched for cardiovascular trials completed between January 2010 and January 2014...
June 7, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28616898/smoking-and-the-eye-what-qu%C3%A3-bec-teenagers-know-and-fear
#5
Julie Brûlé, Benoît Tousignant, Stéphanie Marcotte, Marie-Christelle Moreau
BACKGROUND: Although most people associate smoking with lung cancer and heart disease, few are aware of the impact of smoking on ocular health. Studies have suggested a better knowledge of this association might promote higher quit rates, particularly in teenagers. The purpose of our study was to determine the knowledge of teenagers about the effects of smoking on ocular health and the fear associated with several tobacco-related health conditions. METHODS: A self-administered questionnaire was distributed to 180 high school students aged 14 to 17 years...
June 14, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28615160/nkx2-5-is-essential-to-establish-normal-heart-rate-variability-in-the-zebrafish-embryo
#6
Jamie K Harrington, Robert Sorabella, Abigail Tercek, Joseph R Isler, Kimara L Targoff
Heart rate variability (HRV) has become an important clinical marker of cardiovascular health and a research measure for the study of the cardiac conduction system and its autonomic controls. While zebrafish (Danio rerio) is an ideal vertebrate model for understanding heart development, HRV has only recently been investigated in this system. We have previously demonstrated that nkx2.5 and nkx2.7, two homologues of Nkx2-5 expressed in zebrafish cardiomyocytes, play vital roles in maintaining cardiac chamber-specific characteristics...
June 14, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28590266/sex-differences-in-aortic-augmentation-index-in-adolescents
#7
Jennifer Y Barraclough, Frances L Garden, Brett Toelle, Shamus O'Meagher, Guy B Marks, Christopher T Cowell, David S Celermajer, Julian G Ayer
BACKGROUND: Augmentation index (AIx) is a noninvasive measure of pulse wave reflection. AIx is associated with cardiovascular disease. Adult women have a higher AIx than men, but the factors determining this sex-related difference remain to be determined. METHODS: To examine factors associated with AIx in adolescents, participants in the Childhood Asthma Prevention Study, followed from birth, were assessed at age 14 years, with AIx standardized to a heart rate of 75/min (AIx_75) and pulse wave velocity...
June 5, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28590261/orthostatic-hypotension-and-association-of-arterial-compliance-in-elderly-patients-with-hypertension-a-pilot-study
#8
Ayumi Toba, Joji Ishikawa, Kazumasa Harada
BACKGROUNDS: Orthostatic hypotension (OH) is associated with cardiovascular diseases, heart failure, and increased mortality. We evaluated whether OH was affected by cardiac structure and function or autonomic function in elderly hypertensive outpatients. PATIENTS AND METHODS: In 64 hypertension patients (mean age 74.2±1.7 years old), we evaluated changes in blood pressure (BP) and heart rate variability before and after standing up using the MemCalc system. In addition, we retrospectively reviewed their medical records and echocardiographic data...
June 5, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28585333/prospective-cohort-study-cinacalcet-mediated-lowering-of-pth-level-and-cardiovascular-disease-mortality-in-younger-korean-patients-with-stage-5-ckd-at-a-korean-secondary-hospital
#9
H Y Sin
WHAT IS KNOWN AND OBJECTIVES: Cinacalcet may reduce cardiovascular disease (CVD) mortality in elderly patients with chronic kidney disease (CKD). However, previous studies of the clinical responses to cinacalcet have exhibited discrepancies due to highly variable baseline levels of parathyroid hormone (PTH), kidney function and age. Little is known about the true effect of cinacalcet on stage 5 CKD. The objective of the current observational study was to evaluate whether cinacalcet-mediated lowering of PTH levels improves all-cause mortality and cardiovascular disease mortality in younger stage 5 CKD patients (mean age <55 years)...
June 5, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28576852/neurocardiovascular-deficits-in-the-q175-mouse-model-of-huntington-s-disease
#10
Tamara S Cutler, Saemi Park, Dawn H Loh, Maria C Jordan, Tomohiro Yokota, Kenneth P Roos, Cristina A Ghiani, Christopher S Colwell
Cardiovascular dysautonomia as well as the deterioration of circadian rhythms are among the earliest detectable pathophysiological changes in individuals with Huntington's disease (HD). Preclinical research requires mouse models that recapitulate disease symptoms and the Q175 knock-in model offers a number of advantages but potential autonomic dysfunction has not been explored. In this study, we sought to test the dual hypotheses that cardiovascular dysautonomia can be detected early in disease progression in the Q175 model and that this dysfunction varies with the daily cycle...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28571182/prevalence-of-autonomic-neuropathy-in-patients-of-rheumatoid-arthritis-and-its-correlation-with-disease-severity
#11
Devika Aggarwal, Sumeet Singla
INTRODUCTION: Autonomic Neuropathy (AN), found to be a strong predictor of sudden cardiac death, has been reported variably in patients with Rheumatoid Arthritis (RA). Manifesting as sweating disturbances, gastrointestinal irregularities, bladder or erectile dysfunction, AN can significantly affect a patient's quality of life and alter the course of the disease. AIM: This study was undertaken to find out the prevalence and severity of AN in RA patients attending the Rheumatology Clinic at a Tertiary Care Hospital in New Delhi, India and also to investigate its correlation with patient and disease factors such as age, gender, disease severity, duration and serological status...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28566218/relations-between-lipoprotein-a-concentrations-lpa-genetic-variants-and-the-risk-of-mortality-in-patients-with-established-coronary-heart-disease-a-molecular-and-genetic-association-study
#12
Stephen Zewinger, Marcus E Kleber, Vinicius Tragante, Raymond O McCubrey, Amand F Schmidt, Kenan Direk, Ulrich Laufs, Christian Werner, Wolfgang Koenig, Dietrich Rothenbacher, Ute Mons, Lutz P Breitling, Herrmann Brenner, Richard T Jennings, Ioannis Petrakis, Sarah Triem, Mira Klug, Alexandra Filips, Stefan Blankenberg, Christoph Waldeyer, Christoph Sinning, Renate B Schnabel, Karl J Lackner, Efthymia Vlachopoulou, Ottar Nygård, Gard Frodahl Tveitevåg Svingen, Eva Ringdal Pedersen, Grethe S Tell, Juha Sinisalo, Markku S Nieminen, Reijo Laaksonen, Stella Trompet, Roelof A J Smit, Naveed Sattar, J Wouter Jukema, Heinrich V Groesdonk, Graciela Delgado, Tatjana Stojakovic, Anna P Pilbrow, Vicky A Cameron, A Mark Richards, Robert N Doughty, Yan Gong, Rhonda Cooper-DeHoff, Julie Johnson, Markus Scholz, Frank Beutner, Joachim Thiery, J Gustav Smith, Ragnar O Vilmundarson, Ruth McPherson, Alexandre F R Stewart, Sharon Cresci, Petra A Lenzini, John A Spertus, Oliviero Olivieri, Domenico Girelli, Nicola I Martinelli, Andreas Leiherer, Christoph H Saely, Heinz Drexel, Axel Mündlein, Peter S Braund, Christopher P Nelson, Nilesh J Samani, Daniel Kofink, Imo E Hoefer, Gerard Pasterkamp, Arshed A Quyyumi, Yi-An Ko, Jaana A Hartiala, Hooman Allayee, W H Wilson Tang, Stanley L Hazen, Niclas Eriksson, Claes Held, Emil Hagström, Lars Wallentin, Axel Åkerblom, Agneta Siegbahn, Igor Karp, Christopher Labos, Louise Pilote, James C Engert, James M Brophy, George Thanassoulis, Peter Bogaty, Wojciech Szczeklik, Marcin Kaczor, Marek Sanak, Salim S Virani, Christie M Ballantyne, Vei-Vei Lee, Eric Boerwinkle, Michael V Holmes, Benjamin D Horne, Aroon Hingorani, Folkert W Asselbergs, Riyaz S Patel, Bernhard K Krämer, Hubert Scharnagl, Danilo Fliser, Winfried März, Thimoteus Speer
BACKGROUND: Lipoprotein(a) concentrations in plasma are associated with cardiovascular risk in the general population. Whether lipoprotein(a) concentrations or LPA genetic variants predict long-term mortality in patients with established coronary heart disease remains less clear. METHODS: We obtained data from 3313 patients with established coronary heart disease in the Ludwigshafen Risk and Cardiovascular Health (LURIC) study. We tested associations of tertiles of lipoprotein(a) concentration in plasma and two LPA single-nucleotide polymorphisms ([SNPs] rs10455872 and rs3798220) with all-cause mortality and cardiovascular mortality by Cox regression analysis and with severity of disease by generalised linear modelling, with and without adjustment for age, sex, diabetes diagnosis, systolic blood pressure, BMI, smoking status, estimated glomerular filtration rate, LDL-cholesterol concentration, and use of lipid-lowering therapy...
May 26, 2017: Lancet Diabetes & Endocrinology
https://www.readbyqxmd.com/read/28557555/effect-of-obstructive-sleep-apnea-on-the-response-to-hypertension-therapy
#13
Michael G Ziegler, Milos Milic, Xiaojiong Lu, Munir Gharaibeh, Hamzeh Elayan
Obstructive sleep apnea (OSA) often precedes cardiovascular disease, partly due to treatment resistant hypertension. The nocturnal apneas of OSA trigger increased sympathetic nervous discharge during both sleep and wakefulness. Apneas also trigger cardiac release of the endogenous diuretic atrial natriuretic peptide. We hypothesized that treatment of the excess sympathetic nervous activity of OSA with a β1 blocker would lower 24 h blood pressure (BP) more than diuretic therapy. Subjects with OSA associated hypertension received 2 weeks of placebo followed by the β1 blocker nebivolol or hydrochlorothiazide (HCTZ) for 6 weeks in a blinded crossover study...
May 30, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28542803/early-gestational-age-at-preeclampsia-onset-is-associated-with-subclinical-atherosclerosis-12-years-after-delivery
#14
Martin Christensen, Camilla Skovhus Kronborg, Rasmus Kirkeskov Carlsen, Nikolaj Eldrup, Ulla Breth Knudsen
Women with a history of preeclampsia have increased risk of cardiovascular disease later in life. However, it is unclear if early gestational age at preeclampsia onset is associated with higher cardiovascular disease risk. This study aimed to test the association between gestational age at preeclampsia onset (including the early-onset/late-onset preeclampsia distinction) and subclinical atherosclerosis and arterial stiffness in age-matched women 12 years after index pregnancy MATERIAL AND METHODS: Eligible participants were identified in two Danish registries...
May 23, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28536533/heart-rate-fragmentation-a-new-approach-to-the-analysis-of-cardiac-interbeat-interval-dynamics
#15
Madalena D Costa, Roger B Davis, Ary L Goldberger
Background: Short-term heart rate variability (HRV) is most commonly attributed to physiologic vagal tone modulation. However, with aging and cardiovascular disease, the emergence of high short-term HRV, consistent with the breakdown of the neuroautonomic-electrophysiologic control system, may confound traditional HRV analysis. An apparent dynamical signature of such anomalous short-term HRV is frequent changes in heart rate acceleration sign, defined here as heart rate fragmentation. Objective: The aims were to: (1) introduce a set of metrics designed to probe the degree of sinus rhythm fragmentation; (2) test the hypothesis that the degree of fragmentation of heartbeat time series increases with the participants' age in a group of healthy subjects; (3) test the hypothesis that the heartbeat time series from patients with advanced coronary artery disease (CAD) are more fragmented than those from healthy subjects; and (4) compare the performance of the new fragmentation metrics with standard time and frequency domain measures of short-term HRV...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28531241/effect-of-statin-treatment-vs-usual-care-on-primary-cardiovascular-prevention-among-older-adults-the-allhat-llt-randomized-clinical-trial
#16
Benjamin H Han, David Sutin, Jeff D Williamson, Barry R Davis, Linda B Piller, Hannah Pervin, Sara L Pressel, Caroline S Blaum
Importance: While statin therapy for primary cardiovascular prevention has been associated with reductions in cardiovascular morbidity, the effect on all-cause mortality has been variable. There is little evidence to guide the use of statins for primary prevention in adults 75 years and older. Objectives: To examine statin treatment among adults aged 65 to 74 years and 75 years and older when used for primary prevention in the Lipid-Lowering Trial (LLT) component of the Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial (ALLHAT-LLT)...
May 22, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28527351/permutation-entropy-analysis-of-heart-rate-variability-for-the-assessment-of-cardiovascular-autonomic-neuropathy-in-type-1-diabetes-mellitus
#17
Claudia Carricarte Naranjo, Lazaro M Sanchez-Rodriguez, Marta Brown Martínez, Mario Estévez Báez, Andrés Machado García
Heart rate variability (HRV) analysis is a relevant tool for the diagnosis of cardiovascular autonomic neuropathy (CAN). To our knowledge, no previous investigation on CAN has assessed the complexity of HRV from an ordinal perspective. Therefore, the aim of this work is to explore the potential of permutation entropy (PE) analysis of HRV complexity for the assessment of CAN. For this purpose, we performed a short-term PE analysis of HRV in healthy subjects and type 1 diabetes mellitus patients, including patients with CAN...
July 1, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28526073/pulse-wave-velocity-and-cardiac-autonomic-function-in-type-2-diabetes-mellitus
#18
Stamatina Chorepsima, Ioanna Eleftheriadou, Anastasios Tentolouris, Ioannis Moyssakis, Athanasios Protogerou, Alexandros Kokkinos, Petros P Sfikakis, Nikolaos Tentolouris
BACKGROUND: Increased carotid-femoral pulse wave velocity (PWV) has been associated with incident cardiovascular disease, independently of traditional risk factors. Cardiac autonomic dysfunction is a common complication of diabetes and has been associated with reduced aortic distensibility. However, the association of cardiac autonomic dysfunction with PWV is not known. In this study we examined the association between cardiac autonomic function and PWV in subjects with type 2 diabetes mellitus...
May 19, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/28523821/risk-factors-for-early-cardiovascular-mortality-in-patients-with-bipolar-disorder
#19
Shang-Ying Tsai, Chao-Hsien Lee, Pao-Huan Chen, Kuo-Hsuan Chung, Shou-Hung Huang, Chian-Jue Kuo, Wen-Cheng Wu
AIM: We attempted to determine risk factors, particularly pathophysiological changes, for the early cardiovascular mortality in bipolar disorder. METHODS: A total of 5416 in-patients with bipolar I disorder were retrospectively followed through record linkage for cause of death. A total of 35 patients dying from cardiovascular disease (CVD, ICD 9: 401-443) before the age of 65 years were identified. Two living bipolar patients and two mentally healthy adults were matched with each one deceased patient as control subjects according to age (±2 years), sex, and date (±3 years) of the final/index admission or the date of general health screening...
May 18, 2017: Psychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28521179/biological-predictors-of-insulin-resistance-associated-with-posttraumatic-stress-disorder-in-young-military-veterans
#20
Esther M Blessing, Victor Reus, Synthia H Mellon, Owen M Wolkowitz, Janine D Flory, Linda Bierer, Daniel Lindqvist, Firdaus Dhabhar, Meng Li, Meng Qian, Duna Abu-Amara, Isaac Galatzer-Levy, Rachel Yehuda, Charles R Marmar
Posttraumatic stress disorder (PTSD) is associated with increased risk for Type 2 diabetes and cardiovascular disease (cardiometabolic disease), warranting research into targeted prevention strategies. In the present case-control study of 160 young (mean age 32.7 years) male military veterans, we aimed to assess whether PTSD status predicted increased markers of cardiometabolic risk in otherwise healthy individuals, and further, to explore biological pathways between PTSD and these increased markers of cardiometabolic risk...
May 1, 2017: Psychoneuroendocrinology
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