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Cardiovascular physiology

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https://www.readbyqxmd.com/read/29453534/nanoparticles-caused-oxidative-imbalance
#1
Mariusz Zuberek, Agnieszka Grzelak
Application of nanomaterials in nearly every single branch of industry results in their accumulation in both abiotic environment and tissues of living organisms. Despite the common use of nanomaterials, we are not able to precisely define their toxicity towards humans and surrounding biota. Although we were able to determine final effects of chronic exposure to nanoparticles which consist of many pathologies such as respiratory diseases, allergies, diseases of cardiovascular system, disorders in embryonic life differentiation and growth disorders, toxic effects on the immune system and cancers...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29452906/extracranial-arterial-wall-volume-is-increased-and-shows-relationships-with-vascular-mri-measures-in-idiopathic-parkinson-s-disease
#2
Stephen Ball, Sarah Al-Bachari, Laura M Parkes, Hedley C A Emsley, Charles N McCollum
OBJECTIVE: Idiopathic Parkinson's disease (IPD) is the second most common neurodegenerative disorder, often complicated by dementia. Cardiovascular risk factors and spontaneous cerebral emboli (SCE) are strongly associated with Alzheimer's (AD) and vascular dementia (VaD). We measured SCE in the middle cerebral artery and arterial wall volume in the extracranial arteries in patients with IPD and controls, and explored the relationships with structural and physiological MRI brain neurovascular measures...
February 10, 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29452335/change-in-cardiometabolic-risk-among-blacks-whites-and-hispanics-findings-from-the-health-and-retirement-study
#3
Uchechi A Mitchell, Jennifer A Ailshire, Eileen M Crimmins
Background: Blacks experience greater multi-system physiological dysregulation, or cumulative biological risk, which is associated with poor cardiometabolic health and mortality. In this study, we assess race differences in change in risk over four years among older whites, blacks and Hispanics. Method: We examined race differences in 4-year change in individual biomarkers and a cumulative measure of risk-cardiometabolic risk (CMR)-using data for each respondent from two waves of the Health and Retirement Study's biomarker assessment (n=5,512)...
February 14, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29452273/3d-bioprinted-functional-and-contractile-cardiac-tissue-constructs
#4
Zhan Wang, Sang Jin Lee, Heng-Jie Cheng, James J Yoo, Anthony Atala
Bioengineering of a functional cardiac tissue composed of primary cardiomyocytes has great potential for myocardial regeneration and in vitro tissue modeling. However, its applications remain limited because the cardiac tissue is a highly organized structure with unique physiologic, biomechanical, and electrical properties. In this study, we undertook a proof-of-concept study to develop a contractile cardiac tissue with cellular organization, uniformity, and scalability by using three-dimensional (3D) bioprinting strategy...
February 13, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29451807/coenzyme-q-10-from-bench-to-clinic-in-aging-diseases-a-translational-review
#5
Francisco M Gutierrez-Mariscal, Elena M Yubero-Serrano, Jose M Villalba, Jose Lopez-Miranda
Coenzyme Q 10 (CoQ 10 ) is a ubiquitous molecule present in all eukaryotic organisms whose principal role in the cell is related to its participation in the electron transport chain in the inner mitochondrial membrane. CoQ 10 plays a major role in the control of cell redox status, and both the amount and functionality of this molecule have been related to the regulation of reactive oxygen species generation. Numerous reports can be found discussing the implications of CoQ 10 supplementation in human studies and clinical trials related to aging...
February 16, 2018: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29451687/gpcrs-in-context-sexual-dimorphism-in-the-cardiovascular-system
#6
REVIEW
Margaret A Mouat, James L J Coleman, Nicola J Smith
Cardiovascular disease remains the largest cause of mortality worldwide and there is a clear gender gap in disease occurrence: men are predisposed to earlier onset of cardiovascular disease, including atherosclerosis and hypertension, than are women. Oestrogen may be a driving factor for female-specific cardioprotection, though androgens and sex chromosomes are also likely to contribute to sexual dimorphism in the cardiovascular system. Many G protein-coupled receptor (GPCR)-mediated processes are involved in cardiovascular homeostasis and some exhibit clear sex-divergence...
February 16, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29451501/transitions-in-physiological-coupling-between-heartbeat-and-pulse-across-sleep-stages
#7
Qianli D Y Ma, Changjuan Ji, Huanhuan Xie, Kai Yin, Zhen Ma, Chunhua Bian
The aim of this study is to investigate the coupling behavior between heartbeat and pulse of blood flow at different sleep stages, and to explore the feasibility of using this coupling strength for automatic sleep staging.
 Approach: The electrocardiogram (ECG) and photoplethysmography (PPG) signals are recorded during sleep, and R-wave-to-R-wave intervals (RRI) and Pulse-to-Pulse intervals (PPI) are extracted respectively. The detrended cross-correlation analysis (DCCA) is applied to quantify long-range cross correlations between the RRIs and PPIs across sleep stages...
February 16, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29450689/the-first-multicenter-randomized-controlled-trial-of-home-telemonitoring-for-japanese-patients-with-heart-failure-home-telemonitoring-study-for-patients-with-heart-failure-homes-hf
#8
Norihiko Kotooka, Masafumi Kitakaze, Kengo Nagashima, Machiko Asaka, Yoshiharu Kinugasa, Kotaro Nochioka, Atsushi Mizuno, Daisuke Nagatomo, Daigo Mine, Yoko Yamada, Akiko Kuratomi, Norihiro Okada, Daisuke Fujimatsu, So Kuwahata, Shigeru Toyoda, Shin-Ichi Hirotani, Takahiro Komori, Kazuo Eguchi, Kazuomi Kario, Takayuki Inomata, Kaoru Sugi, Kazuhiro Yamamoto, Hiroyuki Tsutsui, Tohru Masuyama, Hiroaki Shimokawa, Shin-Ichi Momomura, Yoshihiko Seino, Yasunori Sato, Teruo Inoue, Koichi Node
Home telemonitoring is becoming more important to home medical care for patients with heart failure. Since there are no data on home telemonitoring for Japanese patients with heart failure, we investigated its effect on cardiovascular outcomes. The HOMES-HF study was the first multicenter, open-label, randomized, controlled trial (RCT) to elucidate the effectiveness of home telemonitoring of physiological data, such as body weight, blood pressure, and pulse rate, for Japanese patients with heart failure (UMIN Clinical Trials Registry 000006839)...
February 15, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29450657/in-silico-identification-of-small-molecules-as-novel-lxr-agonists-for-the-treatment-of-cardiovascular-disease-and-cancer
#9
Xin Wang, Kaimin Lu, Hao Luo, Danfeng Liang, Xin Long, Yuan Yuan, Chuanfang Wu, Jinku Bao
Liver X receptor (LXR), a member of the nuclear receptor superfamily, mainly serves as a reverse cholesterol transporter in lipid metabolism. It has been demonstrated that LXR is a promising target for the treatment of cardiovascular diseases. LXR is also involved in cancer metabolism, glucose homeostasis, immunity, and various physiological processes. The antitumor function of LXR has become of great interest to researchers in recent years. However, while it is believed that activating LXR with small molecules could be a promising approach to cancer treatment, effective drugs that target LXR are yet to be reported...
February 15, 2018: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/29449442/design-and-rationale-of-the-ripcord-2-trial-does-routine-pressure-wire-assessment-influence-management-strategy-at-coronary-angiography-for-diagnosis-of-chest-pain-a-randomized-controlled-trial-to-compare-routine-pressure-wire-assessment-with-conventional-angiography
#10
REVIEW
Mostafa Elguindy, Rod Stables, Zoe Nicholas, Ian Kemp, Nick Curzen
BACKGROUND: Investigation of anginal chest pain has traditionally involved either assessment of the coronary anatomy by angiography or noninvasive testing for reversible ischemia. Invasive pressure wire assessment at the time of angiography offers information on both anatomy and physiology. Fractional flow reserve-guided percutaneous coronary intervention is associated with lower resource utilization and improved clinical outcome compared with angiographic guidance alone. However, the value of routine fractional flow reserve of all major coronary vessels at the time of diagnostic angiography has not been established in a randomized trial despite persuasive observational data...
February 2018: Circulation. Cardiovascular Quality and Outcomes
https://www.readbyqxmd.com/read/29448942/cold-exposure-induced-oxidative-stress-and-apoptosis-in-the-myocardium-by-inhibiting-the-nrf2-keap1-signaling-pathway
#11
Peifang Cong, Yunen Liu, Nannan Liu, Yubiao Zhang, Changci Tong, Lin Shi, Xuelei Liu, Xiuyun Shi, Ying Liu, Zhou Tong, Mingxiao Hou
BACKGROUND: Exposure to cold weather is associated with infaust cardiovascular responses, including myocardial infarction and arrhythmias. However, the exact mechanisms of these adverse changes in the myocardium under cold stress are unknown. This study was designed to investigate the mechanisms of cardiac injury induced by cold stress in mice. METHODS: The mice were randomly divided into three groups, normal control (no handling), 1-week cold stress and 2-week cold stress...
February 15, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29446755/classification-methods-to-detect-sleep-apnea-in-adults-based-on-respiratory-and-oximetry-signals-a-systematic-review
#12
Md Bashir Uddin, Chin-Moi Chow, Steven W Su
Sleep apnea (SA), a common sleep disorder, can significantly decrease the quality of life, and is closely associated with major health risk such as cardiovascular disease, sudden death, depression, and hypertension. Normal diagnostic process of SA using polysomnography (PSG) is costly and time consuming. In addition, the accuracy of different classification methods to detect SA varies with the use of different physiological signals. If an effective, reliable, and accurate classification method is developed, then the diagnosis of SA and their associated treatment will be time-efficient and economical...
February 15, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29446712/measures-of-sympathetic-and-parasympathetic-autonomic-outflow-from-heartbeat-dynamics
#13
Gaetano Valenza, Luca Citi, J Phillip Saul, Riccardo Barbieri
Reliable and effective non-invasive measures of sympathetic and parasympathetic peripheral outflow are of crucial importance in cardiovascular physiology. Although many techniques have been proposed to take up this long-lasting challenge, none has proposed a satisfying discrimination of the dynamics of the two separate branches. Spectral analysis of heart rate variability is the most currently used technique for such assessment. Despite its widespread use, it has been demonstrated that the subdivision in the low frequency (LF) and high frequency (HF) bands does not fully reflect separate influences of the sympathetic and parasympathetic branches, respectively, mainly due to their simultaneous action in the LF...
February 15, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29445529/cardiorespiratory-interaction-with-continuous-positive-airway-pressure
#14
REVIEW
Martino F Pengo, Sara Bonafini, Cristiano Fava, Joerg Steier
The treatment of choice for obstructive sleep apnoea (OSA) is continuous positive airway pressure therapy (CPAP). Since its introduction in clinical practice, CPAP has been used in various clinical conditions with variable and heterogeneous outcomes. In addition to the well-known effects on the upper airway CPAP impacts on intrathoracic pressures, haemodynamics and blood pressure (BP) control. However, short- and long-term effects of CPAP therapy depend on multiple variables which include symptoms, underlying condition, pressure used, treatment acceptance, compliance and usage...
January 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29445526/intermittent-hypoxia-cardiovascular-disease-and-obstructive-sleep-apnoea
#15
REVIEW
Chris D Turnbull
Obstructive sleep apnoea (OSA) is a common disorder and is associated with cardiovascular disease. Continuous positive airway pressure (CPAP), whilst reducing blood pressure, has not been shown to reduce cardiovascular events when used as a treatment solely for this purpose in patients with previous cardiovascular disease. Developing a better understanding of the mechanisms underlying cardiovascular disease in OSA is important to develop new treatments. Potential causative mechanisms for cardiovascular disease in OSA include arousal induced sympathetic activation, large intrathoracic pressure swings leading to shear stress on the heart and great vessels, and intermittent hypoxia (IH)...
January 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29445525/physiological-consequences-of-cpap-therapy-withdrawal-in-patients-with-obstructive-sleep-apnoea-an-opportunity-for-an-efficient-experimental-model
#16
REVIEW
Esther I Schwarz, John R Stradling, Malcolm Kohler
Randomised controlled trials (RCTs) of continuous positive airway pressure (CPAP) in obstructive sleep apnoea (OSA) are time consuming, and their findings often inconclusive or limited due to suboptimal CPAP adherence in CPAP-naïve patients with OSA. Short-term CPAP withdrawal in patients with prior optimal CPAP adherence results in recurrence of OSA and its consequences. Thus, this experimental model serves as an efficient tool to investigate both the consequences of untreated OSA, and potential treatment alternatives to CPAP...
January 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29441713/human-expression-patterns-qualitative-and-quantitative-analysis-of-thrombospondin-1-under-physiological-and-pathological-conditions
#17
REVIEW
Chen Zhao, Jeffrey S Isenberg, Aleksander S Popel
Thrombospondin-1 (TSP-1), a matricellular protein and one of the first endogenous anti-angiogenic molecules identified, has long been considered a potent modulator of human diseases. While the therapeutic effect of TSP-1 to suppress cancer was investigated in both research and clinical settings, the mechanisms of how TSP-1 is regulated in cancer remain elusive, and the scientific answers to the question of whether TSP-1 expressions can be utilized as diagnostic or prognostic marker for patients with cancer are largely inconsistent...
February 14, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29440390/high-dietary-fat-and-sucrose-results-in-an-extensive-and-time-dependent-deterioration-in-health-of-multiple-physiological-systems-in-mice
#18
James G Burchfield, Melkam A Kebede, Christopher C Meoli, Jacqueline Stöckli, P Tess Whitworth, Amanda L Wright, Nolan J Hoffman, Annabel Y Minard, Xiuquan Ma, James R Krycer, Marin E Nelson, Shi-Xiong Tan, Belinda Yau, Kristen C Thomas, Natalie K Y Wee, Ee-Cheng Khor, Ronaldo F Enriquez, Bryce Vissel, Trevor J Biden, Paul A Baldock, Kyle L Hoehn, James Cantley, Gregory J Cooney, David E James, Daniel J Fazakerley
Obesity is associated with metabolic dysfunction, including insulin resistance and hyperinsulinemia, and with disorders such as cardiovascular disease, osteoporosis, and neurodegeneration. Typically, these pathologies are examined in discrete model systems and with limited temporal resolution, and whether these disorders co-occur is therefore unclear. To address this question, we examined multiple physiological systems in male C57BL/6J mice following prolonged exposure to a high-fat/high-sucrose diet (HFHSD)...
February 13, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29438214/ncrnas-in-cavd-a-review-of-recent-studies
#19
Wen-Juan Ni, Dong-Hong Ma, Xiao-Min Leng
Calcific aortic valve disease (CAVD) is the most common heart valve disorder in human populations. Nevertheless, there are presently no effective means for its prevention and treatment. It is therefore critical to comprehensively define key mechanisms of the disease. A major focus of cardiovascular research has been characterization of how regulation of gene expression maintains healthy physiologic status of the component tissues of the system and how derangements of gene regulation may become pathological...
February 8, 2018: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/29434458/assessing-heart-rate-variability-as-a-surrogate-measure-of-cardiac-autonomic-function-in-chronic-traumatic-spinal-cord-injury
#20
Rasha El-Kotob, B Catharine Craven, Sunita Mathur, David S Ditor, Paul Oh, Masae Miyatani, Mary C Verrier
Background: Although cardiac autonomic dysfunction is a contributing factor for cardiovascular disease development in individuals with a spinal cord injury (SCI), it remains poorly understood. Heart rate variability (HRV) analysis has the potential to non-invasively assess the cardiac autonomic nervous system. The study objectives are (a) to determine if there are differences in HRV measures across neurological level of impairment (NLI) and American Spinal Cord Injury Association Impairment Scale (AIS) subgroups, and (b) to determine if there is a relationship between HRV frequency measures (low frequency [LF] and high frequency [HF]) at rest...
2018: Topics in Spinal Cord Injury Rehabilitation
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