Articles tagged with Heart Atria
Comprehensive exploration of living organisms, biological systems, and life processes across all scales from molecules to ecosystems. Encompasses cutting-edge research in biology, genetics, molecular biology, ecology, biochemistry, microbiology, botany, zoology, evolutionary biology, genomics, and biotechnology. Investigates cellular mechanisms, organism development, genetic inheritance, biodiversity conservation, metabolic processes, protein synthesis, DNA sequencing, CRISPR gene editing, stem cell research, and the fundamental principles governing all forms of life on Earth.
Comprehensive medical research, clinical studies, and healthcare sciences focused on disease prevention, diagnosis, and treatment. Encompasses clinical medicine, public health, pharmacology, epidemiology, medical specialties, disease mechanisms, therapeutic interventions, healthcare innovation, precision medicine, telemedicine, medical devices, drug development, clinical trials, patient care, mental health, nutrition science, health policy, and the application of medical science to improve human health, wellbeing, and quality of life across diverse populations.
Comprehensive investigation of human society, behavior, relationships, and social structures through systematic research and analysis. Encompasses psychology, sociology, anthropology, economics, political science, linguistics, education, demography, communications, and social research methodologies. Examines human cognition, social interactions, cultural phenomena, economic systems, political institutions, language and communication, educational processes, population dynamics, and the complex social, cultural, economic, and political forces shaping human societies, communities, and civilizations throughout history and across the contemporary world.
Fundamental study of the non-living natural world, matter, energy, and physical phenomena governing the universe. Encompasses physics, chemistry, earth sciences, atmospheric sciences, oceanography, materials science, and the investigation of physical laws, chemical reactions, geological processes, climate systems, and planetary dynamics. Explores everything from subatomic particles and quantum mechanics to planetary systems and cosmic phenomena, including energy transformations, molecular interactions, elemental properties, weather patterns, tectonic activity, and the fundamental forces and principles underlying the physical nature of reality.
Practical application of scientific knowledge and engineering principles to solve real-world problems and develop innovative technologies. Encompasses all engineering disciplines, technology development, computer science, artificial intelligence, environmental sciences, agriculture, materials applications, energy systems, and industrial innovation. Bridges theoretical research with tangible solutions for infrastructure, manufacturing, computing, communications, transportation, construction, sustainable development, and emerging technologies that advance human capabilities, improve quality of life, and address societal challenges through scientific innovation and technological progress.
Study of the practice, culture, infrastructure, and social dimensions of science itself. Addresses how science is conducted, organized, communicated, and integrated into society. Encompasses research funding mechanisms, scientific publishing systems, peer review processes, academic ethics, science policy, research institutions, scientific collaboration networks, science education, career development, research programs, scientific methods, science communication, and the sociology of scientific discovery. Examines the human, institutional, and cultural aspects of scientific enterprise, knowledge production, and the translation of research into societal benefit.
Comprehensive study of the universe beyond Earth, encompassing celestial objects, cosmic phenomena, and space exploration. Includes astronomy, astrophysics, planetary science, cosmology, space physics, astrobiology, and space technology. Investigates stars, galaxies, planets, moons, asteroids, comets, black holes, nebulae, exoplanets, dark matter, dark energy, cosmic microwave background, stellar evolution, planetary formation, space weather, solar system dynamics, the search for extraterrestrial life, and humanity's efforts to explore, understand, and unlock the mysteries of the cosmos through observation, theory, and space missions.
Comprehensive examination of tools, techniques, methodologies, and approaches used across scientific disciplines to conduct research, collect data, and analyze results. Encompasses experimental procedures, analytical methods, measurement techniques, instrumentation, imaging technologies, spectroscopic methods, laboratory protocols, observational studies, statistical analysis, computational methods, data visualization, quality control, and methodological innovations. Addresses the practical techniques and theoretical frameworks enabling scientists to investigate phenomena, test hypotheses, gather evidence, ensure reproducibility, and generate reliable knowledge through systematic, rigorous investigation across all areas of scientific inquiry.
Study of abstract structures, patterns, quantities, relationships, and logical reasoning through pure and applied mathematical disciplines. Encompasses algebra, calculus, geometry, topology, number theory, analysis, discrete mathematics, mathematical logic, set theory, probability, statistics, and computational mathematics. Investigates mathematical structures, theorems, proofs, algorithms, functions, equations, and the rigorous logical frameworks underlying quantitative reasoning. Provides the foundational language and tools for all scientific fields, enabling precise description of natural phenomena, modeling of complex systems, and the development of technologies across physics, engineering, computer science, economics, and all quantitative sciences.
Researchers have developed a non-invasive method to estimate blood oxygen levels in heart failure patients using standard cardiac MRI. This breakthrough could spare thousands from undergoing risky tube procedures, allowing for safer and more frequent monitoring.
Scientists at UPF and the Royal Veterinary College have generated 3D reconstructions of cat hearts to analyze thrombi formation. The study reveals a similar risk pattern between cats and humans, highlighting the importance of heart morphology in blood clotting.
Researchers at University of East Anglia developed 4D flow MRI scan to diagnose aortic stenosis more accurately and reliably than current ultrasound techniques. The technology offers more accurate measurements of blood flow through heart valves, leading to better prediction of when patients need surgery.
A University of Minnesota Medical School study identified a key heart marker predicting ischemic stroke and dementia, which could lead to improved patient outcomes. The left atrium's ability to stretch was found to be the most accurate predictor.
Researchers found that the angle at which pulmonary veins reach the left atrial appendage affects blood flow and thrombus formation. The study used a sample of 130 patients to investigate the relationship between pulmonary vein morphology and thrombi risk in atrial fibrillation patients.
A new study found that inter-atrial shunts improve symptoms and outcomes in heart failure patients with reduced left ventricular ejection fraction (LVEF), but worsen outcomes in those with preserved LVEF. The device reduces high pressures in the left atrium, causing shortness of breath and hospitalizations.
A large Kaiser Permanente study found that moderate aortic stenosis patients have similar outcomes to those with mild stenosis. Fine-tuning physician assessment could help identify patients who may benefit from surgery, improving treatment strategies.
The study used magnetic resonance imaging (MRI) to measure acute pressure changes inside the heart, discovering that pressure increases when patients receive a specific medication called adenosine. This technology can help doctors better diagnose and monitor patients with heart disease and heart failure.
The study found that transcatheter edge-to-edge repair achieved a successful repair for nearly 9 out of 10 patients and reduced valve leakage from severe to moderate or less in almost 90% of patients. Patients who underwent the procedure were half as likely to die within one year compared with those in whom the procedure was unsuccessful.
A new study shows that transcatheter mitral valve repair significantly reduces hospitalizations by almost 50 percent and death by nearly 30 percent in heart failure patients with severe mitral regurgitation. The procedure, using Abbott's MitraClip system, improves symptoms, reduces hospitalizations, and leads to longer survival.
Researchers at RIKEN Center for Integrative Medical Sciences discover genes and individual variations associated with atrial fibrillation, predicting stroke and mortality risk. They also uncover a potential treatment target, ERRg, involved in the pathogenesis of atrial fibrillation.
A new study by UC San Francisco researchers found that marijuana, methamphetamine, cocaine, and opiate use are associated with an increased risk of developing atrial fibrillation. Cannabis users had a 35% increased likelihood of later developing AF, similar to traditional tobacco use.
Researchers found a link between atrial cardiopathy and dementia in older adults, with those having the condition at a higher risk of developing dementia over time. The study suggests that subtle changes in the left atrium may be an independent risk factor for dementia, even after controlling for other vascular risk factors.
Researchers found a strong association between atrial cardiopathy and dementia in a study of over 15,000 participants. The study revealed that even those without atrial fibrillation or stroke were at higher risk for dementia, highlighting the need to better understand the mechanisms behind this link.
Researchers found that using advanced image-guided technology didn't lead to better outcomes for patients, but rather put them at higher risk of strokes. The study suggests that a simpler approach may be more effective in treating atrial fibrillation.
The study found significant improvements in blood flow through the heart and quality of life at one year, with all 36 patients achieving a reduction in tricuspid regurgitation severity. Longer follow-up is needed to determine how well the device continues to perform.
Researchers have discovered that bioprosthetic heart valve patients develop an immune response against foreign sugars in the valves, leading to calcification and deterioration. By genetically engineering these sugars out of the valves, durability can be increased, offering a potential solution for patients.
A two-year follow-up of participants found that those who had both their mitral valve and tricuspid valve repaired at the same time experienced better outcomes, including less progression to moderate or severe leakage. This study provides high-level evidence for surgeons on how to perform tricuspid valve repair in these patients.
Left atrium emptying fraction derived from cardiac CTA improves predictive performance of established clinical risk scores. A reduced LAEF independently predicts all-cause mortality within 24 months post-procedure.
A study published by the American Academy of Neurology found that Black people have a higher risk of ischemic stroke due to blood clots, which cannot be fully explained by known risk factors. The researchers identified differences in left atrium structure and function between Black and white participants.
Researchers identified abnormal RNA activity linked to enlarged left atrium and atrial fibrillation. They found microRNA-21-3p levels associated with adverse heart growth, enabling potential targeted medications.
Researchers investigated whether an abnormal left atrium or atrial fibrillation itself is the primary driver of poor health outcomes in patients with A-Fib. The study suggests targeting upstream factors to prevent left atrial abnormalities could be a key to preventing stroke and cognitive decline.
Researchers found that patients with recurrent atrial fibrillation had more preoperative dys-synchrony in the left atrium, indicating a higher risk of failed ablation procedures. A new biomarker based on cardiac imaging analysis could help personalize patient selection and reduce failure rates.
Researchers from Johns Hopkins Medicine have found that specific altered function in the left atrium may signal stroke risk in those with a-fib and possibly those without it. The study suggests that certain features of the heart's upper left chamber could be used to tell apart low-risk from high-risk patients.
Researchers developed a virtual heart model to investigate atrial fibrillation, revealing electrical heterogeneity and fibre structure as key factors in the condition's initiation. The study provides new insights into the complex mechanisms underlying AF, paving the way for potential treatments.
A study of elite cross-country skiers reveals a high prevalence of atrial fibrillation, with rates significantly higher than in the general population. The study identified two key risk factors: slow heart rate at rest and large left atrium size, suggesting that genetic factors may play a role.
Atrial fibrillation is a common cardiac arrhythmia affecting over 3 million Europeans, with high mortality rates. Treatment strategies include chronic antiarrhythmic drug therapy and catheter ablation, both effective but with varying side effects and success rates.
Researchers have found that a delayed-enhancement MRI method holds promise for predicting treatment outcomes and measuring disease progression in patients with atrial fibrillation. The study revealed that those with extensive scar tissue damage were at greater risk of AF recurrence after treatment.
A 35-year-old woman suffered a stroke due to a blood clot caused by a heart defect and birth control pills. She received an interventional neuroradiologist-guided catheter delivery of tPA, resulting in immediate and dramatic improvement. Her stroke score improved from 13 to 1 after treatment.
A small study of MitraClip procedure shows significant reduction in mitral regurgitation and improvement in heart function, including reduced left ventricular enlargement. Patients experienced mild to modest mitral regurgitation after treatment, and continued to enjoy improved symptoms and daily function.
Researchers from Michigan Medicine report dramatic success in treating atrial fibrillation patients using radiofrequency catheter ablation, achieving high cure rates and low complication rates. The technique involves delivering intense radiofrequency waves to specific areas of disorganized electrical activity, resulting in a significan...