Articles tagged with Blood Flow
Researchers have reported significant advancements in measuring blood flow velocity in deep tissues using a handheld ultrasound probe. The new technique, known as photoacoustic flowmetry, has the potential to bring diagnostic capabilities closer to clinical use.
The Society of Nuclear Medicine and Molecular Imaging and the American Society of Nuclear Cardiology have issued joint guidelines for the clinical quantification of myocardial blood flow using Positron Emission Tomography (PET). The guidelines provide a comprehensive framework for the measurement and interpretation of myocardial blood ...
A new mouse study suggests that a high-salt diet can impair blood flow in the brain, leading to cognitive dysfunction. The researchers found that changes in the gut caused by a high-salt diet led to reduced blood flow and dementia-like symptoms in mice.
A high-salt diet reduces resting blood flow to the brain and causes dementia in mice, according to a new study. The study found that mice fed a high-salt diet developed dementia even when blood pressure did not rise, suggesting a direct link between salt intake and cognitive impairment.
A study found that cerebral blood flow is altered in preterm newborns' brains, with key regions such as the insula and anterior cingulate cortex receiving decreased blood supply. This alteration may serve as an early warning sign of disturbed brain maturation.
A study of nearly 62,000 hospitalizations found that 17.6% of PAD patients were readmitted within 30 days after revascularization procedures, with complications being the primary cause of readmission for 30% of cases. Strategies to prevent readmissions focus on high-risk patients with PAD and improving post-procedure care.
A study found that PDA stent placement offered better outcomes than traditional BT shunt operation for infants with ductal-dependent pulmonary blood flow, particularly in experienced centers. Patients who received stents had fewer complications, shorter ICU stays, and larger, more symmetric pulmonary arteries.
Researchers identified a potential drug to protect brain cells after ischemic stroke by mimicking the cellular changes of hibernating ground squirrels. The compound, ebselen, boosts SUMOylation and keeps brain cells alive in the absence of oxygen and glucose.
Scientists discovered a new cell signaling pathway governed by Notch signaling protein that keeps blood vessels intact, which could lead to better drug development and reduce side effects of cancer and cardiovascular treatments. The new pathway operates through a different mechanism than the protein's known transcription-based pathway.
Researchers have developed a method to prolong the survival of stem cells, which could aid in tissue regeneration after blood flow obstruction. By attaching vascular endothelial growth factor to microscopic particles, they increased stem cell lifespan and improved their ability to form new blood vessels.
A study published in Neurology found that reduced heart blood flow may lead to lower blood flow in the brain's memory centers. The research suggests that mechanisms regulating blood flow become vulnerable with age, potentially leading to cognitive impairment.
A study published in Neurology found that older adults with lower cardiac index have reduced blood flow in the temporal lobe regions of the brain, where Alzheimer's pathology begins. This suggests a link between heart health and cognitive impairment, potentially paving the way for new treatments.
A study published in the Journal of Neuroscience suggests that low oxygen levels, not limited blood flow, cause preterm brain cells to fail normal development. This finding opens up opportunities to restore oxygen loss and potentially reduce life-long impacts of preterm brain injury.
A recent study found that participants with type 2 diabetes who lost weight through lifestyle changes had better blood flow to the brain, suggesting a potential cognitive benefit. The intervention was most effective for individuals who were overweight but not obese.
Researchers at the University of Pittsburgh have developed a novel stent to maintain blood flow to organs during transplant surgeries, potentially doubling successful organ donations. The stent, made of smart material, will direct selective blood flow to visceral arteries without disturbing the heart.
Researchers found that blood flow sends signals for heart 'cushion' cells to become fully formed valves through KLF2-Wnt signaling. This discovery supports an epigenetic explanation for common congenital valve defects.
The University of Minnesota Medical School has received a $892,462 grant from the Helmsley Charitable Trust's Rural Healthcare Program to develop a plan for equipping ambulances with mobile emergency departments. The goal is to improve emergency care for critical-need patients in the greater Minneapolis-St. Paul metropolitan area.
A study led by Duke University Medical Center found that biologic valves used in trans-catheter aortic valve replacement (TAVR) and open-heart surgery continue to perform well up to five years after implantation. The results provide reassurance for the long-term benefits of minimally invasive valve replacement.
A University of Leeds research team identified a protein called Piezo1 in the lining of blood vessels that detects changes in blood flow during exercise. The study found that this protein plays a crucial role in controlling blood flow to the intestines, which may help overcome metabolic syndrome and its associated conditions.
The von Willebrand factor molecule undergoes a two-step transformation to activate blood clotting in response to changes in blood flow, which can help prevent hemorrhage or life-threatening blood clots. The findings could inspire smart drugs that target only diseased areas of the body, reducing the risk of excessive bleeding.
A recent study suggests that men may be experiencing a decline in stroke rates, with the rate decreasing by 31% for men compared to no change for women. The study, published in Neurology, analyzed data from 1.3 million adults and found that overall stroke rates declined significantly for men, but not for women.
Researchers developed a system to deliver growth factors to stem cells, enabling their survival and differentiation into new blood vessels. This approach successfully restored blood supply and rescued muscle tissue in mouse models of ischemia.
Researchers at USC found that stiff brain vessels and decreased blood flow are associated with the build-up of harmful plaque and cognitive decline. The study used patient data from the Alzheimer's Disease Neuroimaging Initiative to explore cerebrovascular resistance, a new way to calculate it, and its link to dementia.
A new CT Perfusion technology has been developed to measure blood flow and predict how well ovarian cancer patients will respond to treatment. The study found that a decrease in blood flow is associated with longer survival times, while an increase is linked to shorter survival times.
Researchers found higher rates of brain abnormalities in children with single-ventricle disease as staged surgeries progressed. Cerebral blood flow measurements showed a potential link to brain lesions, but more investigation is needed to confirm causality.
A new discovery at the University of Alberta found that chronic ischemia after spinal cord injury disrupts blood flow, leading to poor oxygenation and motor dysfunction. Elevating oxygen levels improved blood flow and restored function in rat models.
Researchers found that walking significantly increases blood flow to the brain, comparable to running, but less dramatic than cycling. The study uses non-invasive ultrasound to measure internal carotid artery blood velocity waves and arterial diameters.
Researchers at CNIC identified metoprolol's mechanism of action, which protects the heart from inflammation caused by neutrophils. The study opens up new applications for the cheap and safe drug, published in Nature Communications.
Capillaries in the brain's wire-like network can sense activity and generate signals to direct blood flow and deliver nutrients to neurons. This mechanism enables precise control over cerebrovascular blood flow to meet the brain's changing energy needs.
A study on rat models found changes in brain activity and blood flow early in life, potentially linked to hypertension. The researchers suggest that these changes could be a cause of high blood pressure, paving the way for potential prevention strategies.
Researchers found a single compressed stent produces a denser mesh than two overlapping stents, covering at least half of the aneurysm opening. The technique is more effective for large necked saccular aneurysms.
A collaborative effort to improve CFD methodologies for evaluating medical devices has developed two benchmark models with robust experimental data. The study shows that 57% of simulation predictions were within one standard deviation of measured values, but more work is needed to develop widely-acceptable hemolysis solvers.
Researchers at Rochester Institute of Technology study how cells respond to shear stress in blood vessels, aiming to understand biological mechanics and develop effective therapeutic strategies. The work could lead to breakthroughs in treating diseases like cancer metastasis and heart failure.
Researchers at Children's Hospital Los Angeles found a correlation between reduced regional cerebral blood flow in the Broca's area of the frontal lobe and more severe stuttering. The study also suggests that disturbances in speech processing areas of the brain are likely central to stuttering.
Researchers traced neural activity patterns in mice, revealing synchronized and symmetric activity coursing around the brain. This discovery connects to enigmatic signals detected in 'resting-state' fMRI, offering new insights into brain-wide neural activity.
Researchers have created computer models of blood flow through the heart's upper left chamber that may help predict stroke risk. The study found that a corkscrewlike motion helps move blood efficiently through the atrium, whereas an enlarged and diseased heart fails to form this motion, increasing the risk of developing a blood clot.
Researchers use optimal coherence tomography (OCT) angiography to identify characteristic patterns of different forms of glaucoma based on their vascular patterns. This breakthrough technology could lead to earlier diagnosis and potentially slow down the progression of vision loss.
A new imaging technique can predict who is most at risk for stroke due to atrial fibrillation. The technique, called 'atrial 4D flow CMR,' detects blood flow velocity and can help reduce over-treatment of patients.
A new study aims to develop objective indicators for diagnosing concussions using transcranial Doppler ultrasound to measure blood vessel function in the brain. The researchers hope to create a non-invasive, inexpensive method to accurately diagnose concussions and prevent second-impact syndrome.
A University of Maryland study found that stopping exercise for just 10 days significantly decreases blood flow to key brain regions, including the hippocampus. This decrease in cerebral blood flow can have long-term implications for brain health and cognitive function in older adults.
Research suggests that younger women with coronary heart disease are vulnerable to the damaging effects of psychological stress on their heart. The study found that stress-induced, reduced blood flow occurred more frequently in younger women than men, especially among those under 50 years old.
A new study reveals how blood flow dynamics within blood vessels may influence the development or rupture of plaques, potentially leading to early interventions in treating heart disease. The research improves predictions of circumferential wall stress and identifies weak spots on a vessel wall that are likeliest to fail.
Researchers found that fidgeting one leg intermittently during three hours of sitting increased blood flow and prevented a decline in arterial function. The study suggests that even small amounts of movement can be beneficial when walking or exercising is not an option.
Researchers at St. Michael's Hospital discovered brain shrinkage, reduced blood flow, and white matter damage in college athletes with a history of concussion. These findings suggest that even young, healthy adults may be affected by repeated head injuries.
A new study published in Frontiers in Human Neuroscience found that cognitive training improves executive function and memory, while aerobic exercise increases global brain flow. The study also showed that both mental and physical exercises produce observable benefits for brain health.
Stent retrievers effectively reverse strokes by removing gelatinous blood clots, outperforming intravenous drug tPA in reducing disability. The devices will impact stroke systems of care and treatment location, routing higher severity patients to centers capable of neuroendovascular procedures.
Researchers found that newborn mice brain's neural activity does not trigger a corresponding boost in blood flow, unlike the adult brain. The study reveals how the growing brain feeds itself and sheds new light on brain development.
Researchers analyzed untreated acute stroke patients and found no correlation between salvageable penumbra and time. However, they discovered a significant association between salvaged penumbra and collateral blood flow rerouting of the blocked arteries.
Researchers at MUSC discovered that blood flow does not precisely follow local neural activity, challenging the long-held assumption that vascular and neural responses are tightly coupled. This finding suggests that fMRI may only reveal a blurred representation of underlying neural activity.
A recent study published in NeuroImage found a positive correlation between fitness and increased blood flow to areas of the brain where Alzheimer's pathology is usually first detected. Regular physical activity, regardless of age, may provide some protection from dementia.
Patients treated with stent retrievers within 2.5 hours of symptom onset had a 91% chance of functional independence, compared to 81% for those treated between 2.5-3.5 hours. Inter-facility transfer times can significantly delay treatment.
Researchers used an advanced form of ultrasound to map blood flow activity in the brain, detecting changes that differentiate healthy and concussed athletes 83% of the time. The study suggests a new tool for quickly recognizing concussions on the sidelines.
Researchers at the University of California, San Diego have developed a potential new therapy for critical limb ischemia, a condition that causes extremely poor circulation in the limbs. The therapy, an injectable gel derived from skeletal muscle tissue, promotes muscle remodeling and improves blood flow in a rat model.
Research suggests that quicker clot removal can significantly improve stroke patient outcomes, with 88% of patients experiencing substantial blood flow restoration. However, delays in treatment can result in decreased functional independence, highlighting the importance of timely intervention.
A recent animal study suggests that alcohol exposure before birth may impair kidney blood flow and amplify neurological problems caused by stroke. The research found increased arterial resistance within the kidneys and greater levels of impairment in mice exposed to alcohol in utero, with a significant impact on females.
Researchers at UTA are designing safer cryotherapy devices to reduce nerve and tissue damage caused by extreme cold therapy. They will also investigate the physiological mechanisms behind blood flow reductions and develop new devices for precise treatment.
Scientists have developed a flexible nanogenerator made from cellulose that can harness energy from the body, including heartbeats and blood flow. The device has been shown to charge capacitors and power small electronics.
A $4 million NSF grant will fund research at MUSC and UAB to map changes in blood flow when specific neurons fire. This could lead to new treatments for neurological diseases by understanding the mechanisms of neurovascular communication.
Researchers at Cornell University discovered triggers that could reduce congenital heart defect risk in newborns by regulating embryonic heart and valve formation. They found cyclic stretches activate enzymes that coordinate biological responses, leading to proper valve maturation.
A new study suggests that hydroxyurea can be effective in reducing the risk of stroke for some children with sickle cell disease. The Transcranial Doppler with Transfusions Changing to Hydroxyurea (TWiTCH) study, stopped early due to positive preliminary results, showed that transitioning from regular blood transfusions to daily doses ...