1,871,311 results match your criteria Cardiac MRI - Technical Aspects Primer


Elevated soluble urokinase plasminogen activator receptor (suPAR) in COVID-19 patients.

Clin Chem Lab Med 2021 Jun 14. Epub 2021 Jun 14.

Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), NSW Health Pathology, Westmead Hospital, Westmead, NSW, Australia.

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Arteriovenous Fistula Formation After Transradial Coronary Intervention.

Tex Heart Inst J 2021 Jun;48(2)

Department of Cardiology, Michigan State University, East Lansing, Michigan.

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Multi-scale hierarchical scaffolds with aligned micro-fibers for promoting cell alignment.

Biomed Mater 2021 Jun 11. Epub 2021 Jun 11.

Tsinghua University, Tsinghua University, Beijing, Beijing, 100084, CHINA.

Cell alignment plays an essential role in cytoskeleton reorganization, extracellular matrix remodeling, and biomechanical properties regulation of tissues such as vascular tissues, cardiac muscles, and tendons. Based on the natural-oriented features of cells in native tissues, various biomimetic scaffolds have been reported with the introduction of well-arranged ultrafine fibers to induce cell alignment. However, it is still a challenge to fabricate scaffolds with suitable mechanical properties, biomimetic microenvironment, and ability to promote cell alignment. Read More

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Chronic hypoxia in pregnant mice impairs the placental and fetal vascular response to acute hypercapnia in BOLD-MRI hemodynamic response imaging.

Placenta 2021 Jun 3;110:29-38. Epub 2021 Jun 3.

The Goldyne Savad Institute of Gene Therapy and MRI Laboratory, Human Biology Research Center, Hadassah Hebrew University Medical Center, Ein Karem, And the Faculty of Medicine, Hebrew University, Jerusalem, Israel; The Wohl Institute for Translational Medicine, Hadassah Hebrew University Medical Center, Ein Karem, And the Faculty of Medicine, Hebrew University, Jerusalem, Israel.

Introduction: Brief hypercapnic challenge causes acute placental hypoperfusion with fetal brain sparing on BOLD-MRI. We hypothesize that this non-invasive imaging strategy can distinguish between normal pregnancy and chronic placental hypoperfusion (using the maternal hypoxia model).

Methods: Eighteen pregnant female ICR mice were randomized to three groups: normoxia, late-onset hypoxia (12%O;E13. Read More

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Characterization of arrhythmias, evaluation of cardiac biomarkers and their association with survival in calves suffering from foot-and-mouth disease.

J Vet Cardiol 2021 Apr 18;36:64-76. Epub 2021 Apr 18.

Indian Veterinary Research Institute, Regional Campus, Hebbal, Bengaluru, Karnataka, 560024, India.

Introduction: Foot-and-mouth disease (FMD) causes mortality in calves due to myocarditis; however, the effects of FMD virus on cardiac arrhythmogenesis and Purkinje cells are unknown. Identifying diagnostic and prognostic markers in FMD-affected calves may be useful in disease management in the endemic countries.

Materials And Methods: A total of 81 FMD-affected calves were prospectively monitored till death or recovery. Read More

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In-Hospital Acute Ischemic Stroke is Associated with Worse Outcome: Experience of a Single Center in Santiago Chile.

J Stroke Cerebrovasc Dis 2021 Jun 8;30(8):105894. Epub 2021 Jun 8.

Unidad de Neurología Vascular, Servicio de Neurología, Departamento de Neurología y Psiquiatría, Clínica Alemana de Santiago, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Chile; Unidad de Neurología Vascular, Servicio de Neurología, Departamento de Neurología y Psiquiatría y Departamento de Paciente Critico, Clínica Alemana de Santiago, Facultad de Medicina Clínica Alemana Universidad del Desarrollo, Santiago, Chile.

Objectives: In-hospital acute ischemic stroke (HIS) accounts for 2-17% of all acute ischemic strokes (AIS) seen in hospital and they have worse prognosis. In this study we aimed to identify the frequency of HIS and their characteristics in our center.

Materials And Methods: Retrospective analysis of a prospective register of patients with AIS seen at Clínica Alemana de Santiago, between January 2017 and January 2019. Read More

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Multisystem inflammatory syndrome in children with COVID-19.

Am J Emerg Med 2021 Jun 8;49:148-152. Epub 2021 Jun 8.

Department of Emergency Medicine, Brooke Army Medical Center, USA.

Background: Multisystem inflammatory syndrome in children (MIS-C) is a dangerous pediatric complication of COVID-19.

Objective: The purpose of this review article is to provide a summary of the diagnosis and management of MIS-C with a focus on management in the acute care setting.

Discussion: MIS-C is an inflammatory syndrome which can affect nearly any organ system. Read More

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Monte Carlo determination of dose coefficients at different developmental stages of zebrafish (Danio rerio) in experimental condition.

J Environ Radioact 2021 Jun 8;237:106667. Epub 2021 Jun 8.

State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions. Electronic address:

The release of liquid effluent of nuclear power into aquatic system increases with the rapid development of nuclear facilities in coastal and inland regions. Aquatic model animals are very important for the study of the radiation hazards to non-human biota in water environment and its extrapolation of dose-effect relationship to human models. However, the study of the radiation dose rate calculation model of the aquatic animal zebrafish is still on the homogeneous isotropic model used for the protection of the environment. Read More

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PCR-based detection of Toxoplasma gondii from cattle in southern Iran.

Comp Immunol Microbiol Infect Dis 2021 Jun 2;77:101677. Epub 2021 Jun 2.

Jahrom City Veterinary Office, Jahrom, Iran.

Objective: Toxoplasma gondii is a protozoan parasite that is widely prevalent in most warm-blooded vertebrates. Humans mainly become infected by eating raw or undercooked meat. This study was designed to investigate the infection of cattle with T. Read More

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COPD maintenance medication is linked to left atrial size: Results from the COSYCONET cohort.

Respir Med 2021 May 29;185:106461. Epub 2021 May 29.

Department of Medicine, Pulmonary and Critical Care Medicine, University of Marburg (UMR), Germany, Member of the German Center for Lung Research (DZL), Marburg, Germany. Electronic address:

Background: Lung function impairment in COPD is known to be related to reductions of left heart size, while short-term interventional trials with bronchodilators showed positive effects on cardiac parameters. We investigated whether COPD maintenance therapy has analogous long-term effects.

Methods: Pooled data of GOLD grade 1-4 patients from visits 1 and 3 (1. Read More

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Left ventricle motion estimation for cine MR images using sparse representation with shape constraint.

Phys Med 2021 Jun 8;87:49-64. Epub 2021 Jun 8.

College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, Guangdong, China.

Purpose: To propose a left ventricle (LV) motion estimation method based on sparse representation, in order to handle the spatial-varying intensity distortions caused by tissue deformation.

Methods: For each myocardial landmark, an adaptive dictionary was generated by learning transformations from a training dataset. Then the landmark was tracked using sparse representation. Read More

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An adaptive text message intervention to promote well-being and health behavior adherence for patients with cardiovascular disease: intervention design and preliminary results.

J Acad Consult Liaison Psychiatry 2021 Jun 8. Epub 2021 Jun 8.

Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA. Electronic address:

Background: Most individuals with heart disease struggle to adhere to cardiovascular health behaviors, despite their known health benefits. Text message interventions (TMIs) are a promising treatment modality for health behavior promotion, but existing TMIs typically deliver a fixed set of messages and do not target well-being constructs associated with adherence and cardiovascular health.

Methods: A four-week TMI, which delivers daily messages to promote well-being and adherence to health behaviors and dynamically adapts based on participant feedback to deliver increasingly customized messages, was developed by the study team. Read More

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Exercise attenuates angiotensinⅡ-induced muscle atrophy by targeting PPARγ/miR-29b.

J Sport Health Sci 2021 Jun 8. Epub 2021 Jun 8.

Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, School of Life Science, Shanghai University, Shanghai 200444, China; Shanghai Engineering Research Center of Organ Repair, School of Medicine, Shanghai University, Shanghai 200444, China. Electronic address:

Background: Exercise is beneficial for muscle atrophy. Peroxisome proliferator-activated receptor gamma (PPARγ) and microRNA-29b (miR-29b) have been reported to be responsible for angiotensin Ⅱ (AngⅡ)-induced muscle atrophy. However, it is unclear whether exercise can protect AngⅡ-induced muscle atrophy by targeting PPARγ/miR-29b. Read More

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External validation of a predictive model of adverse events following spine surgery.

Spine J 2021 Jun 8. Epub 2021 Jun 8.

Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA.

Background Context: We lack models that reliably predict 30-day postoperative adverse events (AEs) following spine surgery.

Purpose: We externally validated a previously developed predictive model for common 30-day adverse events (AEs) after spine surgery.

Study Design/setting: This prospective cohort study utilizes inpatient and outpatient data from a tertiary academic medical center. Read More

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Commentary: Fate revealed: how simulation predicts false lumen evolution.

Semin Thorac Cardiovasc Surg 2021 Jun 8. Epub 2021 Jun 8.

Department of Cardiac Surgery, Sant'Ambrogio Hospital, Milan, Italy. Electronic address:

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Low cytotoxic quinoline-4-carboxylic acids derived from vanillin precursors as potential human dihydroorotate dehydrogenase inhibitors.

Bioorg Med Chem Lett 2021 Jun 8:128194. Epub 2021 Jun 8.

Faculty of Science, Department of Chemistry, University of Kragujevac, R. Domanovica 12, 34000 Kragujevac, Serbia. Electronic address:

Twenty novel 2-substituted quinoline-4-carboxylic acids bearing amide moiety were designed and synthesized by Doebner reaction. Human dihydroorotate dehydrogenase (hDHODH) was recognized as a biological target and all compounds were screened as potential hDHODH inhibitors in an enzyme inhibition assay. The prepared heterocycles were also evaluated for their cytotoxic effects on the healthy HaCaT cell line while lipophilic properties were considered on the basis of experimentally determined logD values at physiological pH. Read More

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Feasibility of MR fingerprinting using a high-performance 0.55 T MRI system.

Magn Reson Imaging 2021 Jun 8. Epub 2021 Jun 8.

Department of Radiology, Case Western Reserve University, Cleveland, OH, United States of America. Electronic address:

Background: MR fingerprinting (MRF) is a versatile method for rapid multi-parametric quantification. The application of MRF for lower MRI field could enable multi-contrast imaging and improve exam efficiency on these systems. The purpose of this work is to demonstrate the feasibility of 3D whole-brain T1 and T2 mapping using MR fingerprinting on a contemporary 0. Read More

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Selenium mitigated aflatoxin B1-induced cardiotoxicity with potential regulation of 4 selenoproteins and ferroptosis signaling in chicks.

Food Chem Toxicol 2021 Jun 8:112320. Epub 2021 Jun 8.

Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China. Electronic address:

The aim of the present study was to explore the underlying mechanism of selenium (Se)-mediated detoxification of aflatoxin B (AFB)-induced cardiotoxicity in chicks. A Se-deficient, corn-soybean meal-basal diet (36 μg Se/kg, BD) and three test diets (BD+1.0 mg AFB/kg, 0. Read More

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MicroRNA-532-5p-programmed cell death protein 4 (PDCD4) axis regulates angiotensin II-induced human umbilical vein endothelial cell apoptosis and proliferation.

Microvasc Res 2021 Jun 8:104195. Epub 2021 Jun 8.

Department of Neonatology, Kaifeng Maternity and Children Health Hospital, Kaifeng City, Henan Province 475002, PR China.

Background: This study was carried out to investigate the effect of microRNA miR-532-5p on the proliferation of hypertension endothelial cells.

Methods: Angiotensin II (Ang II)-treated human umbilical vein endothelial cells (HUVECs) and primary human aortic endothelial cells (HAECs) were used as cell models to imitate the pathological changes in endothelial cells under hypertensive conditions. The expression levels of miR-532-5p and programmed cell death protein 4 (PDCD4) were detected by Quantitative Real-time PCR (qRT-PCR). Read More

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Society for Maternal-Fetal Medicine (SMFM) Consult Series #56: Hepatitis C in Pregnancy: Updated Guidelines.

Am J Obstet Gynecol 2021 Jun 8. Epub 2021 Jun 8.

In the United States, it is estimated that 1% to 4% of pregnant women are infected with hepatitis C virus, which carries approximately a 5% risk of transmission from mother to infant. Hepatitis C virus can be transmitted to the infant in utero or during the peripartum period, and infection during pregnancy is associated with an increased risk of adverse fetal outcomes, including fetal growth restriction and low birthweight. The purpose of this document is to discuss the current evidence, provide updated recommendations regarding screening, review treatment, and address management of hepatitis C virus during pregnancy. Read More

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Evolving Cost-Quality Relationship in Pediatric Heart Surgery.

Ann Thorac Surg 2021 Jun 8. Epub 2021 Jun 8.

Department of Surgery, University of Florida, Gainesville, FL.

Background: For the >40,000 US children undergoing congenital heart surgery annually, the relationship between hospital quality and costs remains unclear. Prior studies report conflicting results and clinical outcomes have continued to improve over time. We examined a large contemporary cohort, aiming to better inform ongoing initiatives seeking to optimize healthcare value in this population. Read More

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Valve Sparing Root Replacement versus Bio-Bentall: Inverse Propensity Weighting of 796 Patients.

Ann Thorac Surg 2021 Jun 8. Epub 2021 Jun 8.

Columbia University Vagelos College of Physicians and Surgeons, New York, NY; Division of Cardiothoracic and Vascular Surgery, New York Presbyterian Hospital, Columbia University Medical Center, New York, NY. Electronic address:

Background: This large cohort, single center study aims to compare the 10-year survival and freedom from aortic valve reintervention between valve sparing root replacement (VSRR) and bioprosthetic Bentall (bio-Bentall).

Methods: All patients undergoing elective VSRR or bio-Bentall for aortic root aneurysm between March 2005 through October 2019 were retrospectively reviewed (n=796 [VSRR = 360]). Inverse probability of treatment weighting (IPTW) balanced clinical variables between groups. Read More

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Association between abdominal fat and mortality in patients undergoing cardiovascular surgery.

Ann Thorac Surg 2021 Jun 8. Epub 2021 Jun 8.

Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea. Electronic address:

Background: Obesity is associated with reduced postoperative mortality in patients undergoing cardiovascular surgery. However, body mass index cannot differentiate abdominal fat composition. This study evaluated the relationships between total abdominal, subcutaneous, and visceral fat composition and postoperative mortality in East Asian patients undergoing cardiovascular surgery. Read More

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Complex infantile Scimitar variant: primary stenosis of a meandering pulmonary vein.

Ann Thorac Surg 2021 Jun 8. Epub 2021 Jun 8.

Pediatric Cardiac Surgery, St Joseph's Children's Hospital, BayCare Health System, Tampa, FL; Pediatric Cardiac Surgery, UPMC Heart & Vascular Institute, Pittsburgh, PA.

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In Memoriam: Charles Ross Hatcher Jr., MD, 1930 - 2021.

Authors:
Robert A Guyton

Ann Thorac Surg 2021 Jun 8. Epub 2021 Jun 8.

Emory University School of Medicine, Atlanta, Georgia. Electronic address:

Raised in a small Georgia town, Charles Ross Hatcher, Jr. was trained by surgical legends Alfred Blalock and Francis Moore and developed into a superior cardiac surgeon at Emory University. Years before others, as President of the STSA (1983-84) and the STS (1986-87), he recognized and spoke of the challenges facing medicine and our specialty. Read More

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From development toward therapeutics, a collaborative effort on blood progenitors.

Stem Cell Reports 2021 May 28. Epub 2021 May 28.

Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Stem Cell Program and Division of Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, MA 02115, USA; Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Harvard Stem Cell Institute, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA. Electronic address:

The National Heart, Lung, and Blood Institute Progenitor Cell Translational Consortium Blood Progenitor Meeting was hosted virtually on November 5, 2020, with 93 attendees across 20 research groups. The purpose of this meeting was to exchange recent findings, discuss current efforts, and identify prospective opportunities in the field of hematopoietic stem and progenitor cell research and therapeutic discovery. Read More

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Mesenchymal stromal cell-derived exosomes in cardiac regeneration and repair.

Stem Cell Reports 2021 May 22. Epub 2021 May 22.

Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong SAR, China; Shenzhen Institutes of Research and Innovation, the University of Hong Kong, Hong Kong SAR, China; Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong SAR, China; Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, the University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong SAR, China. Electronic address:

Mesenchymal stromal cell (MSC)-derived exosomes play a promising role in regenerative medicine. Their trophic and immunomodulatory potential has made them a promising candidate for cardiac regeneration and repair. Numerous studies have demonstrated that MSC-derived exosomes can replicate the anti-inflammatory, anti-apoptotic, and pro-angiogenic and anti-fibrotic effects of their parent cells and are considered a substitute for cell-based therapies. Read More

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Renoprotective effects of levosimendan on acute kidney injury following cardiac arrest via anti-inflammation, anti-apoptosis and ERK activation.

FEBS Open Bio 2021 Jun 11. Epub 2021 Jun 11.

Department of Emergency, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.

ATP-sensitive potassium channels (KATPs) have protective effects in ischemia-reperfusion-induced injuries and can be activated by levosimendan. This study investigated the effects of levosimendan on renal injury, inflammation, apoptosis and survival in a rat model of acute kidney injury (AKI) following cardiac arrest (CA) and cardiopulmonary resuscitation (CPR). Rats underwent a 5-minute asphyxia-based CA and resuscitation. Read More

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An overview on the COVID-19 complications in pediatric population: A pandemic dilemma.

Int J Clin Pract 2021 Jun 11:e14494. Epub 2021 Jun 11.

Department of Pharmacy Practice, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.

Aim: The primary objective of this article is to understand the various complications caused by the coronavirus in the pediatric population.

Method: An electronic search was conducted using PubMed and incorporated forward and backward research methods on clinical trials, case reports, case series guidelines, and reports from the centre for disease control and prevention (CDC) and the keywords included Covid-19, Paediatrics, Multisystem inflammatory syndrome in children (MIS-C), Complications, Acute kidney injury, Heart failure. Secondary resources included one study from pre-print servers (www. Read More

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Cooperativity between β-agonists and c-Abl inhibitors in regulating airway smooth muscle relaxation.

FASEB J 2021 Jul;35(7):e21674

Department of Medicine, Pulmonary and Critical Care Medicine, Center for Translational Medicine, Korman Respiratory Institute, Thomas Jefferson University, Philadelphia, PA, USA.

Current therapeutic approaches to avoid or reverse bronchoconstriction rely primarily on β2 adrenoceptor agonists (β-agonists) that regulate pharmacomechanical coupling/cross bridge cycling in airway smooth muscle (ASM). Targeting actin cytoskeleton polymerization in ASM represents an alternative means to regulate ASM contraction. Herein we report the cooperative effects of targeting these distinct pathways with β-agonists and inhibitors of the mammalian Abelson tyrosine kinase (Abl1 or c-Abl). Read More

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