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https://www.readbyqxmd.com/read/27925652/inclusion-of-a-rest-period-in-diaphragmatic-breathing-increases-high-frequency-heart-rate-variability-implications-for-behavioral-therapy
#1
Matthew E B Russell, April B Scott, Ian A Boggero, Charles R Carlson
Heart rate variability (HRV) is associated with positive physiological and psychological effects. HRV is affected by breathing parameters, yet debate remains regarding the best breathing interventions for strengthening HRV. The objective of the current study was to test whether the inclusion of a postexhalation rest period was effective at increasing HRV, while controlling for breathing rate. A within-subject crossover design was used with 40 participants who were assigned randomly to a breathing pattern including a postexhalation rest period or a breathing pattern that omitted the postexhalation rest period...
December 7, 2016: Psychophysiology
https://www.readbyqxmd.com/read/27924921/birth-weight-and-risk-of-ischemic-heart-disease-a-mendelian-randomization-study
#2
Shiu Lun Au Yeung, Shi Lin Lin, Albert Martin Li, C Mary Schooling
Low birth weight is a risk factor for cardiovascular disease. However, the association could be confounded by many factors. We used Mendelian randomization to clarify the role of birth weight in ischemic heart disease (IHD) and lipids. We used all 7 single nucleotide polymorphisms (SNPs) independently contributing to birth weight at genome wide significance (p < 5 × 10(-8)) in separate sample instrumental variable analysis to estimate the effect of birth weight on IHD using the CARDIoGRAMplusC4D 1000 Genomes based GWAS case (n = 60,801)-control (n = 123,504) study and on lipids using GLGC (n = 188,577)...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27924681/factors-associated-with-30-day-mortality-in-elderly-inpatients-with-community-acquired-pneumonia-during-two-influenza-seasons
#3
Núria Torner, Conchita Izquierdo, Núria Soldevila, Diana Toledo, Judith Chamorro, Elena Espejo, Amelia Fernández-Sierra, Angela Domínguez
Community-acquired pneumonia (CAP) refers to pneumonia unrelated to hospitals or extended-care facilities. The aim of this study was to determine factors associated with 30-day mortality in patients with CAP aged ≥65 years admitted to 20 hospitals in seven Spanish regions during the 2013-14 and 2014-15 influenza seasons. Logistic regression was used to identify factors associated with 30-day mortality. The adjusted model included variables selected by backward elimination with a cut off of < 0.02. A total of 1928 CAP cases were recorded; 60...
December 7, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27924582/modeling-rasopathies-with-genetically-modified-mouse-models
#4
Isabel Hernández-Porras, Carmen Guerra
The RAS/MAPK signaling pathway plays key roles in development, cell survival and proliferation, as well as in cancer pathogenesis. Molecular genetic studies have identified a group of developmental syndromes, the RASopathies, caused by germ line mutations in this pathway. The syndromes included within this classification are neurofibromatosis type 1 (NF1), Noonan syndrome (NS), Noonan syndrome with multiple lentigines (NS-ML, formerly known as LEOPARD syndrome), Costello syndrome (CS), cardio-facio-cutaneous syndrome (CFC), Legius syndrome (LS, NF1-like syndrome), capillary malformation-arteriovenous malformation syndrome (CM-AVM), and hereditary gingival fibromatosis (HGF) type 1...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27924461/life-satisfaction-and-hemodynamic-reactivity-to-mental-stress
#5
Andreas Schwerdtfeger, Kerstin Gaisbachgrabner, Claudia Traunmüller
BACKGROUND: Satisfaction with life has been considered a health-protective variable, which could impact cardiovascular morbidity and mortality. However, few studies have examined the physiological pathways involved in the potentially salutary effect of life satisfaction. It was hypothesized that life satisfaction should be associated with a cardiovascular response profile that signals challenge (i.e., higher cardiac output, lower peripheral resistance), rather than threat during a mental stress task...
December 6, 2016: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
https://www.readbyqxmd.com/read/27924218/sex-related-differences-in-the-associations-between-plasma-free-fatty-acid-levels-and-clinical-features-in-patients-with-hypertrophic-cardiomyopathy
#6
Chengzhi Yang, Changlin Zhang, Jiansong Yuan, Jingang Cui, Shengwen Liu, Fenghuan Hu, Weixian Yang, Xuanye Bi, Shubin Qiao
BACKGROUND: Previous studies have indicated that inefficient energy utilization may play a pivotal role in hypertrophic cardiomyopathy (HCM). However, whether plasma free fatty acid (FFA), a main energy substrate of heart, has an effect on HCM remains unclear. Besides, several studies have suggested sex-related differences in HCM features and FFA metabolism. Here, we aimed to explore the association between plasma FFA levels and HCM and potential effects of sex on this relation. METHODS: A total of 412 patients (age 47...
2016: Biology of Sex Differences
https://www.readbyqxmd.com/read/27924216/atrial-fibrillation-management-in-older-heart-failure-patients-a-complex-clinical-problem
#7
REVIEW
Giovanni Pulignano, Donatella Del Sindaco, Maria Denitza Tinti, Stefano Tolone, Giovanni Minardi, Antonio Lax, Massimo Uguccioni
BACKGROUND: Atrial fibrillation (AF) and heart failure (HF), two problems of growing prevalence as a consequence of the ageing population, are associated with high morbidity, mortality, and healthcare costs. AF and HF also share common risk factors and pathophysiologic processes such as hypertension, diabetes mellitus, ischemic heart disease, and valvular heart disease often occur together. Although elderly patients with both HF and AF are affected by worse symptoms and poorer prognosis, there is a paucity of data on appropriate management of these patients...
January 2016: Heart International
https://www.readbyqxmd.com/read/27924215/influence-diagram-of-physiological-and-environmental-factors-affecting-heart-rate-variability-an-extended-literature-overview
#8
REVIEW
Julien Fatisson, Victor Oswald, François Lalonde
Heart rate variability (HRV) corresponds to the adaptation of the heart to any stimulus. In fact, among the pathologies affecting HRV the most, there are the cardiovascular diseases and depressive disorders, which are associated with high medical cost in Western societies. Consequently, HRV is now widely used as an index of health. In order to better understand how this adaptation takes place, it is necessary to examine which factors directly influence HRV, whether they have a physiological or environmental origin...
January 2016: Heart International
https://www.readbyqxmd.com/read/27923789/influence-of-sympathetic-nerve-activity-on-aortic-hemodynamics-and-pulse-wave-velocity-in-women
#9
Ronee E Harvey, Jill N Barnes, Emma C J Hart, Wayne T Nicholson, Michael J Joyner, Darren P Casey
Central (aortic) blood pressure, arterial stiffness, and sympathetic nerve activity increase with age in women. However, it is unknown if the age-related increase in sympathetic activity influences aortic hemodynamics and carotid-femoral pulse wave velocity (cfPWV), an index of central aortic stiffness. The goal of this study was to determine if aortic hemodynamics and cfPWV are directly influenced by sympathetic nerve activity by measuring aortic hemodynamics, cfPWV, and muscle sympathetic nerve activity (MSNA) in women before and during autonomic ganglionic blockade with trimethaphan camsylate...
December 6, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27923290/computerised-analysis-of-antepartum-foetal-heart-parameters-new-reference-ranges
#10
Natascia Giuliano, Maria Laura Annunziata, Francesca Giovanna Esposito, Salvatore Tagliaferri, Andrea Di Lieto, Giovanni Magenes, Maria Gabriella Signorini, Marta Campanile, Domenico Arduini
We selected 4012 cCTG records (one trace for each patient) performed in healthy pregnancies from 30th to 42nd gestational week using foetal heart rate (FHR), short-term variability (STV), long-term irregularity (LTI), Delta, approximate entropy (ApEn), spectral components as low frequency (LF), median frequency (MF), high frequency (HF) and LF/(HF + MF) ratio were analysed. Reference nomograms were created and sensitivity and specificity for the prediction of foetal compromise were calculated which were 90% and 89%, respectively...
December 6, 2016: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/27923235/association-of-the-cholinergic-muscarinic-m2-receptor-with-autonomic-nervous-system-activity-in-patients-with-schizophrenia-on-high-dose-antipsychotics
#11
Masatoshi Miyauchi, Ikuko Kishida, Akira Suda, Yohko Shiraishi, Saki Hattori, Mami Fujibayashi, Masataka Taguri, Chie Ishii, Norio Ishii, Toshio Moritani, Yoshio Hirayasu
BACKGROUND: Patients with schizophrenia have abnormal autonomic nervous system (ANS) activity compared with the general population. One reason for this difference is the muscarinic affinity for antipsychotic drugs; therefore, single nucleotide polymorphisms (SNPs) of the muscarinic receptor gene influence this ANS dysfunction. This study sought to determine the effect of SNPs of the cholinergic muscarinic receptor (CHRM) gene on ANS activity in patients with schizophrenia receiving antipsychotic drugs...
December 7, 2016: Neuropsychobiology
https://www.readbyqxmd.com/read/27922910/impact-of-medicare-s-nonpayment-program-on-hospital-acquired-conditions
#12
Caroline P Thirukumaran, Laurent G Glance, Helena Temkin-Greener, Meredith B Rosenthal, Yue Li
BACKGROUND: Medicare's Nonpayment Program of 2008 (hereafter called Program) withholds hospital reimbursement for costs related to hospital-acquired conditions (HACs). Little is known whether a hospital's Medicare patient load [quantified by the hospital's Medicare utilization ratio (MUR), which is the proportion of inpatient days financed by Medicare] influences its response to the Program. OBJECTIVE: To determine whether the Program was associated with changes in HAC incidence, and whether this association varies across hospitals with differential Medicare patient load...
December 5, 2016: Medical Care
https://www.readbyqxmd.com/read/27922885/ventricular-assist-device-implantation-configurations-impact-overall-mechanical-circulatory-support-system-thrombogenic-potential
#13
Wei-Che Chiu, Yared Alemu, Allison J McLarty, Shmuel Einav, Marvin J Slepian, Danny Bluestein
Ventricular assist devices (VAD) became in recent years the standard of care therapy for advanced heart failure with hemodynamic compromise. With the steadily growing population of device recipients, various post-implant complications have been reported, mostly associated with the hyper-shear generated by VADs that enhance their thrombogenicity by activating platelets. While VAD design optimization can significantly improve its thromboresistance, the implanted VAD need to be evaluated as part of a system. Several clinical studies indicated that variability in implantation configurations may contribute to the overall system thrombogenicity...
December 2, 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/27920726/hrvanalysis-a-free-software-for-analyzing-cardiac-autonomic-activity
#14
Vincent Pichot, Frédéric Roche, Sébastien Celle, Jean-Claude Barthélémy, Florian Chouchou
Since the pioneering studies of the 1960s, heart rate variability (HRV) has become an increasingly used non-invasive tool for examining cardiac autonomic functions and dysfunctions in various populations and conditions. Many calculation methods have been developed to address these issues, each with their strengths and weaknesses. Although, its interpretation may remain difficult, this technique provides, from a non-invasive approach, reliable physiological information that was previously inaccessible, in many fields including death and health prediction, training and overtraining, cardiac and respiratory rehabilitation, sleep-disordered breathing, large cohort follow-ups, children's autonomic status, anesthesia, or neurophysiological studies...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27919928/impact-of-surgical-ablation-of-atrial-fibrillation-on-the-progression-of-tricuspid-regurgitation-and-right-sided-heart-remodeling-after-mitral-valve-surgery-a-propensity-score-matching-analysis
#15
Jiangang Wang, Jie Han, Yan Li, Qing Ye, Fei Meng, Tiange Luo, Baiyu Tian, Haibo Zhang, Yixin Jia, Wen Zeng, Chunlei Xu, Wei Han, Yuqing Jiao, Xu Meng
BACKGROUND: This study assessed the role of surgical ablation for atrial fibrillation (AF) in decreasing tricuspid regurgitation (TR) and right-sided heart remodeling in patients after mitral valve procedure. METHODS AND RESULTS: Between 1994 and 2014, 1568 consecutive patients with AF undergoing mitral valve procedure were identified. In 26.0% (n=408), surgical ablation of AF was used. Propensity-score matching (PSM) was performed on the basis of 41 known perioperative risk variables...
December 5, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27919821/specific-micrornas-comparisons-in-hypoxia-and-morphine-preconditioning-against-hypoxia-reoxgenation-injury-with-and-without-heart-failure
#16
Hai-Juan Zhu, Zheng-Yi Han, Shu-Fang He, Shi-Yun Jin, Shi-Jin Xu, Xiang-Dong Fang, Ye Zhang
AIMS: Ischemia reperfusion (I/R) injury is an inevitable event arising during the cardiovascular diseases development and the process of potent surgical treatments. microRNAs (miRNAs) are critical regulators of multiple cell processes including I/R injury. The present study aims to quantify miRNA alterations and regulated genes upon hypoxia-reoxygenation (H/R) injury in a rat heart failure model comparing with normal cardiomyocytes. MAIN METHODS: Chronic heart failure was established by injecting doxorubicin (2mg/kg/week) for 6weeks, then H/R was performed on primary cultured cardiomyocytes isolated from normal and failed heart...
December 2, 2016: Life Sciences
https://www.readbyqxmd.com/read/27919506/heart-rate-variability-predicts-the-magnitude-of-heart-rate-decrease-after-fingolimod-initiation
#17
Sakari Simula, Tomi P Laitinen, Tiina M Laitinen, Päivi Hartikainen, Juha Ek Hartikainen
BACKGROUND: Fingolimod is an immunomodulator with a disease modifying effect on relapsing-remitting multiple sclerosis (RRMS). A heart rate (HR) decrease shortly after fingolimod initiation, however, requires a clinical vigilance. The aim of this study was to prospectively investigate whether cardiac autonomic regulation can predict the magnitude of HR decrease after fingolimod initiation. METHODS: Twenty-five patients with RRMS underwent ambulatory 24-h electrocardiogram recording to assess HR variability 20±16 days before fingolimod initiation (baseline) and repeated at the day of fingolimod initiation to assess the magnitude of HR decrease...
November 2016: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/27919337/radiation-and-circulatory-disease
#18
Mark P Little
Exposure to therapeutic doses of ionizing radiation is associated with damage to the heart and coronary arteries. However, only recently have studies with high-quality individual dosimetry data allowed this risk to be quantified while also adjusting for concomitant chemotherapy, and medical and lifestyle risk factors. At lower levels of exposure the evidence is less clear. In this article I review radiation-associated risks of circulatory disease in groups treated with radiotherapy for malignant and non-malignant disease, and in occupationally- or environmentally-exposed groups receiving rather lower levels of radiation dose, also for medical diagnostic purposes...
October 2016: Mutation Research
https://www.readbyqxmd.com/read/27919011/cardiovascular-autonomic-and-hemodynamic-responses-to-vagus-nerve-stimulation-in-drug-resistant-epilepsy
#19
Iñigo Garamendi, Marian Acera, Marta Agundez, Lara Galbarriatu, Ainhoa Marinas, Iñigo Pomposo, Elena Valle, Jose-Alberto Palma, Juan C Gomez-Esteban
PURPOSE: Vagus nerve stimulation (VNS) is used as an adjunctive therapy for treating patients with drug-resistant epilepsy. The impact of VNS on cardiovascular autonomic function remains to be fully understood. We determined changes in cardiovascular sympathetic and parasympathetic, and hemodynamic function in association with VNS in patients with drug-resistant focal epilepsy. METHOD: Longitudinal (n=15) evaluation of beat-to-beat blood pressure (BP) and heart rate variability (HRV), baroreflex sensibility, and hemodynamic function performed before VNS implantation, 6-months after implantation, and a mean of 12-months after implantation; and cross-sectional study (n=14) of BP and HR variability and baroreflex sensitivity during VNS on and VNS off...
December 2, 2016: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/27918706/effects-of-gaba-neural-regulation-and-intrinsic-cardiac-factors-on-heart-rate-variability-in-zebrafish-larvae
#20
Rafael Antonio Vargas
Heart rate (HR) is a periodic activity that is variable over time due to intrinsic cardiac factors and extrinsic neural control, largely by the autonomic nervous system. Heart rate variability (HRV) is analyzed by measuring consecutive beat-to-beat intervals. This variability can contain information about the factors regulating cardiac activity under normal and pathological conditions, but the information obtained from such analyses is not yet fully understood. In this article, HRV in zebrafish larvae was evaluated under normal conditions and under the effect of substances that modify intrinsic cardiac activity and cardiac activity modulated by the nervous system...
December 5, 2016: Zebrafish
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