keyword
MENU ▼
Read by QxMD icon Read
search

heart function

keyword
https://www.readbyqxmd.com/read/28812309/murine-pulmonary-imaging-at-7t-t2-and-t1-with-anisotropic-ute
#1
Jinbang Guo, Xuefeng Cao, Zackary I Cleveland, Jason C Woods
PURPOSE: To measure the T2* and T1 of mouse lung at 7T via anisotropic-resolution radial ultrashort echo-time imaging with ellipsoidal k-space coverage. METHODS: Ellipsoidal field-of-view was created by expanding uniform spherical k-space coverage. The effects of T2* and ellipsoidal sampling on image resolution were investigated by using point-spread-function analysis and resolution phantoms. Finally, this ellipsoidal sampling approach was used to measure the lung T2* and T1 of healthy C57BL/6 mice at the increasingly common preclinical field strength of 7T...
August 15, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28812280/effect-of-missing-inter-beat-interval-data-on-heart-rate-variability-analysis-using-wrist-worn-wearables
#2
Hyun Jae Baek, JaeWook Shin
Most of the wrist-worn devices on the market provide a continuous heart rate measurement function using photoplethysmography, but have not yet provided a function to measure the continuous heart rate variability (HRV) using beat-to-beat pulse interval. The reason for such is the difficulty of measuring a continuous pulse interval during movement using a wearable device because of the nature of photoplethysmography, which is susceptible to motion noise. This study investigated the effect of missing heart beat interval data on the HRV analysis in cases where pulse interval cannot be measured because of movement noise...
August 15, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28812203/assessment-of-methodologies-to-calculate-intraventricular-pressure-differences-in-computational-models-and-patients
#3
Francisco J Londono-Hoyos, Abigail Swillens, Joris Van Cauwenberge, Brett Meyers, Maheswara Reddy Koppula, Pavlos Vlachos, Julio A Chirinos, Patrick Segers
Intraventricular pressure differences (IVPDs) govern left ventricular (LV) efficient filling and are a significant determinant of LV diastolic function. Our primary aim is to assess the performance of available methods (color M-mode (CMM) and 1D/2D MRI-based methods) to determine IVPDs from intracardiac flow measurements. Performance of three methods to calculate IVPDs was first investigated via an LV computational fluid dynamics (CFD) model. CFD velocity data were derived along a modifiable scan line, mimicking ultrasound/MRI acquisition of 1D (IVPDCMM/IVPD1D MRI) and 2D (IVPD2D MRI) velocity-based IVPD information...
August 16, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28811767/effectiveness-and-safety-of-recombinant-human-brain-natriuretic-peptide-in-the-treatment-of-acute-myocardial-infarction-in-elderly-in-combination-with-cardiac-failure
#4
Hong Xu, Bosong Wang, Qingmei Meng, Jinlong Li, Weidong Sun, Li Xin, Liping Chen
OBJECTIVE: To investigate the effects and safety of recombinant human brain natriuretic peptide (rhBNP) in the treatment of elderly acute myocardial infarction induced cardiac failure. METHODS: One hundred and forty-six patients who were diagnosed as elderly acute myocardial infarction induced cardiac failure in the hospital from July 2014 to July 2015 were selected. They were divided into a test group and a control group, 73 each. Patients in both groups were given conventional treatment such as stabilization of atherosclerotic plaques, anti-platelet and remodeling and reversion of myocardium...
May 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28811392/role-of-sympathetic-cotransmitter-galanin-on-autonomic-balance-in-heart-failure-an-active-player-or-a-bystander
#5
Demet Özkaramanlı Gür, Miray Sağbaş, Aydın Akyüz, Savaş Güzel, Şeref Alpsoy, Niyazi Güler
OBJECTIVE: Galanin, a cotransmitter similar to neuropeptide Y (NPY), aggravates autonomic imbalance in systolic heart failure (HF) by attenuating vagal tonus after burst sympathetic activity. In animal HF models, galanin antagonists have improved cardiac function. To determine whether galanin is a promising therapeutic target in HF, we studied its concentrations in HF patients and evaluated its correlation with NPY, markers of humoral activity such as pro-BNP and copeptin, and echocardiographic parameters of HF severity...
August 11, 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28811308/wilms-tumour-1-wt1-in-development-homeostasis-and-disease
#6
REVIEW
Nicholas D Hastie
The study of genes mutated in human disease often leads to new insights into biology as well as disease mechanisms. One such gene is Wilms' tumour 1 (WT1), which plays multiple roles in development, tissue homeostasis and disease. In this Primer, I summarise how this multifaceted gene functions in various mammalian tissues and organs, including the kidney, gonads, heart and nervous system. This is followed by a discussion of our current understanding of the molecular mechanisms by which WT1 and its two major isoforms regulate these processes at the transcriptional and post-transcriptional levels...
August 15, 2017: Development
https://www.readbyqxmd.com/read/28811250/deficiency-in-perilipin-5-reduces-mitochondrial-function-and-membrane-depolarization-in-mouse-hearts
#7
Linda Andersson, Christina Drevinge, Ismena Mardani, Knut T Dalen, Marcus Ståhlman, Martina Klevstig, Annika Lundqvist, Fred Haugen, Martin Adiels, Per Fogelstrand, Jorge Asin-Cayuela, Lillemor Mattsson Hultén, Max Levin, Ewa Ehrenborg, Yun K Lee, Alan R Kimmel, Jan Borén, Malin C Levin
Myocardial triglycerides stored in lipid droplets are important in regulating the intracellular delivery of fatty acids for energy generation in mitochondria, for membrane biosynthesis, and as agonists for intracellular signaling. Previously, we showed that deficiency in the lipid droplet protein perilipin 5 (Plin5) markedly reduces triglyceride storage in cardiomyocytes and increases the flux of fatty acids into phospholipids. Here, we investigated whether Plin5 deficiency in cardiomyocytes alters mitochondrial function...
August 12, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28811239/gamma-glutamyltransferase-and-risk-of-chronic-kidney-disease-a-prospective-cohort-study
#8
Setor K Kunutsor, Jari A Laukkanen
BACKGROUND: Elevated serum gamma-glutamyltransferase (GGT) activity has been linked with an increased risk of chronic kidney disease (CKD) in Asian populations. We aimed to assess the prospective association of serum GGT with risk of CKD in a Caucasian population. MATERIALS AND METHODS: We related GGT activity to the incidence of CKD in 2338 men aged 42-61years of the Kuopio Ischemic Heart Disease study with normal kidney function at baseline. Repeat measurements of GGT were used to correct for within-person variability...
August 12, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28811048/receipt-of-nephrology-care-and-clinical-outcomes-among-veterans-with-advanced-ckd
#9
Enrica Fung, Tara I Chang, Glenn M Chertow, I-Chun Thomas, Steven M Asch, Manjula Kurella Tamura
BACKGROUND: Clinical practice guidelines recommend referral to nephrology when estimated glomerular filtration rate (eGFR) decreases to <30mL/min/1.73m(2); however, evidence for benefits of nephrology care are mixed. STUDY DESIGN: Observational cohort using landmark analysis. SETTINGS & PARTICIPANTS: A national cohort of veterans with advanced chronic kidney disease, defined as an outpatient eGFR≤30mL/min/1.73m(2) for January 1, 2010, through December 31, 2010, and a prior eGFR<60mL/min/1...
August 12, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28810961/resuscitation-of-hypotensive-traumatic-brain-injured-animals-with-spray-dried-plasma-does-not-adversely-alter-physiology-and-improves-blood-brain-barrier-function
#10
Steven McDaniel, Stephanie Golla, Anthony N Moore, Joe DaCorta, Arthur Bode, Shibani Pati, Pramod K Dash, Jing Zhao
INTRODUCTION: According to the Defense and Veterans Brain Injury Center and the Armed Forces Health Surveillance Center, the number of soldiers who have sustained a traumatic brain injury (TBI) has risen dramatically over the past decade. Studies have shown that brain damage can be exacerbated if blood loss occurs (often occurring in polytrauma). As blood supply is critical for brain function and survival, TBI patients must be properly resuscitated to maintain blood volume, blood pressure, and cerebral perfusion...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810825/regulatory-t-cell-levels-in-the-longest-surviving-asian-patient-after-heart-lung-transplant
#11
Lei Huang, Ming Ji, Shounan Yi, Xinmin Zhou
Heart-lung transplant is the most effective therapy for patients with end-stage cardiopulmonary disease. Here, we report an initial assessment of a 31-year-old man who had survived more than 11 years after heart-lung transplant, which represents the longest survival time in this procedure in Asian studies. At his 11th anniversary after transplant, extensive tests were carried out, especially to detect regulatory T-cell levels for the first time in a surviving heart-lung transplant recipient. Preliminarily data revealed the status of his immunologic function in relation to chronic allograft rejection...
August 13, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28810641/allicin-improves-carotid-artery-intima-media-thickness-in-coronary-artery-disease-patients-with-hyperhomocysteinemia
#12
De-Shan Liu, Shu-Li Wang, Jun-Mei Li, Er-Shun Liang, Ming-Zhong Yan, Wei Gao
Homocysteine (Hcy) is an important and independent risk factor for atherosclerotic diseases, such as coronary artery disease and ischemic cerebrovascular disease. Increased carotid artery intima-media thickness (IMT) is a non-invasive marker of systemic atherosclerosis. Allicin treatment may decrease serum Hcy levels and improve impaired endothelial function in rats with hyperhomocysteinemia (HHcy). The present study hypothesized that allicin has an anti-atherosclerotic effect in coronary heart disease and tested the effects of allicin treatment on carotid artery IMT and plasma Hcy levels in coronary heart disease patients with HHcy...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28810603/intratracheal-administration-of-isosorbide-dinitrate-improves-pulmonary-artery-pressure-and-ventricular-remodeling-in-a-rat-model-of-heart-failure-following-myocardial-infarction
#13
Xuelian Wang, Qingqing Xu, Tianqi Li, Yaocong Rong, Weilin Hong, Yan Huang, Xingui Guo
Pulmonary hypertension due to left heart disease is associated with poor outcomes. This study investigated the beneficial effects of isosorbide dinitrate (ISDN) inhalation on pulmonary pressure and ventricular remodeling in a rat model of heart failure (HF) following myocardial infarction (MI). To assess the effect of ISDN on pulmonary pressure, 20 male Sprague-Dawley (SD) rats were randomized to four groups: Normal saline (NS) 1 ml/kg, ISDN 1 mg/kg, NS 3 ml/kg or ISDN 3 mg/kg following coronary ligation. Assessments included pulmonary and systemic artery pressure alterations, lung weight/body weight and plasma nitric oxide (NO) concentration...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28810592/protective-effect-and-mechanism-of-estrogen-receptor-%C3%AE-on-myocardial-infarction-in-mice
#14
Jun-Biao Zhang, Chang-Lei Guo
The protective effect and the mechanism of estrogen receptor β (ERβ) on myocardial infarction (MI) in mice were explored. A total of 12 female Tg-ERβ transgenic mice and 12 non-transgenic littermate control (NLC) wild-type C57 mice were used for the present study. Both transgenic and wild-type mice had similar baseline data such as age, sex, and weight. The mouse model of MI was established by coronary artery ligation method, and the cardiac structure and function changes of the mouse were observed by ultrasonic echocardiography on days 1, 3 and 7 after the operation...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28810584/evaluation-of-two-dimensional-strain-echocardiography-for-quantifying-right-ventricular-function-in-patients-with-pulmonary-arterial-hypertension
#15
Yong Liu, Yong Wang, Yingying Wang, Zhe Wen
The aim of the current study was to evaluate the use of two-dimensional strain echocardiography (2DS) in quantifying right ventricular (RV) function in patients with pulmonary arterial hypertension (PAH). A total of 41 patients with PAH and 40 healthy control patients were recruited to the study. 2DS was used to determine the strain (ε) and strain rate (SR) of basal, middle and apical segments of the RV free wall. The aforementioned indicators were compared with measurements of RV function taken by conventional ultrasound and right heart catheterization...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28810537/cilostazol-protects-mice-against-myocardium-ischemic-reperfusion-injury-by-activating-a-ppar%C3%AE-jak2-stat3-pathway
#16
Jiangjin Li, Xiaoli Xiang, Xiaoxuan Gong, Yafei Shi, Jing Yang, Zuo Xu
Myocardial ischemia/reperfusion (MIR) injury causes severe arrhythmias and a high lethality. The present study is designed to investigate the effect of cilostazol on MIR injury and the underlying mechaism. We measured the effects of cilostazol on heart function parameters in a mouse model of MIR. Proinflammatory cytokines and apoptosis proteins in the myocardium were examined to investigate the anti-inflammatory and anti-apoptosis ability of cilostazol. The participation of PPARγ/JAK2/STAT3 pathway was investigated...
August 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28810362/effect-of-exercise-training-in-heart-rate-variability-anxiety-depression-and-sleep-quality-in-kidney-recipients-a-preliminary-study
#17
Rodrigo Barroso, Antonio C Silva-Filho, Carlos José Dias, Nivaldo Soares, Alessandra Mostarda, Luana Anaisse Azoubel, Leandro Melo, Alessandra de Mc Garcia, Bruno Rodrigues, Cristiano Texeira Mostarda
The aim of this study was to compare the sleep quality, depression, anxiety, and autonomic function of a group of kidney-transplanted recipients who joined a combined exercise program (KTRt) or remained sedentary (KTRs). A total of 20 kidney-transplanted recipients, split into two groups (10 KTRt and 10 KTRs), joined the study. Heart rate variability, cardiorespiratory capacity, depression, and sleep questionnaires were evaluated. KTRt presented lower Pittsburgh Sleep Quality Index and greater entropy, and increased parasympathetic and decreased sympathetic modulation than KTRs...
November 1, 2016: Journal of Health Psychology
https://www.readbyqxmd.com/read/28809834/quantifying-infra-slow-dynamics-of-spectral-power-and-heart-rate-in-sleeping-mice
#18
Laura M J Fernandez, Sandro Lecci, Romain Cardis, Gil Vantomme, Elidie Béard, Anita Lüthi
Three vigilance states dominate mammalian life: wakefulness, non-rapid eye movement (non-REM) sleep, and REM sleep. As more neural correlates of behavior are identified in freely moving animals, this three-fold subdivision becomes too simplistic. During wakefulness, ensembles of global and local cortical activities, together with peripheral parameters such as pupillary diameter and sympathovagal balance, define various degrees of arousal. It remains unclear the extent to which sleep also forms a continuum of brain states-within which the degree of resilience to sensory stimuli and arousability, and perhaps other sleep functions, vary gradually-and how peripheral physiological states co-vary...
August 2, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28808939/comparison-of-left-ventricular-shape-by-gated-spect-imaging-in-diabetic-and-nondiabetic-patients-with-normal-myocardial-perfusion-a-propensity-score-analysis
#19
Carmela Nappi, Valeria Gaudieri, Wanda Acampa, Roberta Assante, Emilia Zampella, Ciro Gabriele Mainolfi, Mario Petretta, Guido Germano, Alberto Cuocolo
BACKGROUND: Diabetes mellitus induces structural and functional cardiac alterations that can result in heart failure. Left ventricular (LV) shape is a dynamic component of cardiac geometry influencing its contractile function. However, few data are available comparing LV shape index in diabetic and nondiabetic patients without overt coronary artery disease after balancing for coronary risk factors. METHODS: We studied 1168 patients with normal myocardial perfusion and normal LV ejection fraction on stress gated single-photon emission computed tomography (SPECT) imaging...
August 14, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28808858/vitamin-d-and-heart-failure
#20
REVIEW
D Marshall Brinkley, Omair M Ali, Sandip K Zalawadiya, Thomas J Wang
PURPOSE: Vitamin D is principally known for its role in calcium homeostasis, but preclinical studies implicate multiple pathways through which vitamin D may affect cardiovascular function and influence risk for heart failure. Many adults with cardiovascular disease have low vitamin D status, making it a potential therapeutic target. We review the rationale and potential role of vitamin D supplementation in the prevention and treatment of chronic heart failure. RECENT FINDINGS: Substantial observational evidence has associated low vitamin D status with the risk of heart failure, ventricular remodeling, and clinical outcomes in heart failure, including mortality...
August 14, 2017: Current Heart Failure Reports
keyword
keyword
97310
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"