Articles tagged with Blood Flow
A review of scientific literature found pregnant women infected by SARS-CoV-2 have a higher risk of developing pre-eclampsia due to reduced ACE2 availability. ACE2 plays a crucial role in placental development, blood pressure control, and fetal development, making its impairment more susceptible to serious complications.
Researchers developed a novel detector system using superconducting nanowire single-photon detectors to measure cerebral blood flow. The SNSPD-DCS system showed significant improvement in signal-to-noise ratio compared to conventional SPAD-based DCS, allowing for clearer detection of arterial pulses.
A new study found that 44% of micro-arteries from patients had abnormal myogenic tone, associated with excessive caldesmon presence and poor cell alignment. This abnormality affects blood supply within the heart and other organs, impacting quality of life and life expectancy.
Researchers found that a mobile interventional stroke team treated patients faster and with better outcomes than standard care. Patients treated by the MIST team were more likely to be functionally independent at 90 days post-stroke.
A world-first study found that cancer patients receiving chemotherapy intravenously have more than double the risk of developing a blood clot or thrombosis if the vein is too small and the catheter occupies more than 45% of the vein. Researchers identified specific limits on catheter-to-vein ratios to reduce risks for cancer patients.
A soft and stretchy ultrasound patch can monitor blood flow and heart function in real-time, detecting cardiovascular conditions like strokes and heart attacks. The patch is non-invasive and can penetrate deep tissue depths, providing a more comprehensive picture of internal organs.
A team of researchers has uncovered the intricate cellular mechanism behind calcium's role in regulating energy supply to specific brain regions. By studying calcium signals in capillaries, they found that increased calcium levels trigger nitric oxide production, leading to vessel relaxation and enhanced blood flow.
Researchers at Penn State identified a link between red blood cell flow and fluctuations in brain oxygenation. The study found that random flow rates through tiny blood vessels contribute to these changes, which may have implications for understanding neurodegenerative diseases.
Researchers from the University of Sussex found that blood flow and oxygen levels in the hippocampus are lower than those in other brain regions, making it vulnerable to damage. Increasing blood flow in the hippocampus may be effective in preventing damage from happening.
A new simulation method predicts blood flow conditions that cause pathological behavior of the human blood protein vWF. This breakthrough has the potential to optimize the design of left ventricular assist devices used in heart failure patients and improve diagnosis and treatment of von Willebrand disease, a common inherited bleeding d...
Researchers developed functional interferometric diffusing wave spectroscopy (fiDWS) to measure brain blood flow and activation noninvasively. The technology uses near-infrared light and has been shown to be faster and more accurate than existing methods, with applications in diagnosing strokes and monitoring brain injuries.
Researchers used OCT angiography to image patients with sickle cell retinopathy and found that sequential imaging can help assess disease progression and treatment effectiveness. The study showed that untreated patients had more flickering blood vessels, indicating a higher risk of permanent blockage.
A simple device improved care after kidney transplantation by reducing swelling, hospital stays, and surgical site infections. Patients experienced a 31% reduction in swelling and a 60% decrease in wound infection rates.
Researchers at Uppsala University have discovered that macrophages, a common immune cell, play a crucial role in re-establishing blood flow in damaged tissue. This finding could lead to the development of new treatments for cardiovascular diseases by increasing local concentrations of signal substances in damaged muscles.
Researchers at MUSC developed an AI software to predict CAD blockages' significance without catheterization. The software analyzes CT images of heart vessels and plaques, estimating blood flow and identifying high-risk features. This noninvasive method saves time, costs, and risks for patients and clinicians.
By integrating telemedicine, physicians at MUSC Health have shortened the time between stroke symptom onset and treatment by 15-20 minutes. This reduces complications from tPA and improves functional outcomes for patients.
A new study by researchers at UT Southwestern shows that exercise programs for older adults with mild memory loss can increase blood flow to their brains. The results add to growing evidence linking exercise with brain health, suggesting that regular aerobic exercise may help improve cognition and memory in healthy older adults.
Researchers used two-photon imaging and optogenetics to isolate brain capillaries in animal models, discovering that pericytes regulate blood flow through a slower process than upstream arteries. The findings have implications for stroke treatment and potential therapeutics.
Researchers at UBCO's Heart Valve Performance Lab have developed a novel bileaflet mechanical heart valve that functions like the real thing, improving blood flow and preventing clots. The design incorporates a slight twist to mitigate clotting risk and enhances overall performance.
Researchers found increased blood flow and dilation of brain arterioles during non-REM and REM sleep stages, indicating the brain's ability to clear waste products. This discovery could lead to a better understanding of how disrupted sleep affects mental health conditions like anxiety and depression.
The use of neck restraints by law enforcement has been linked to potential neurologic consequences, including brain oxygen deprivation. The American Medical Association urges caution and calls for further research into the safety and appropriateness of these devices.
A team of Penn State engineers found a connection between nitric oxide-expressing neurons and changes in arterial diameters in mice, shedding light on brain function and aging. The researchers discovered that approximately half of the dynamic range in blood vessel diameter is controlled by a small group of neurons.
Researchers from Sun Yat-Sen University, Harvard University, and Guangzhou University investigated viscoelastic flow mixing in microfluidics. They found that viscoelastic fluids exhibit transiently unstable flow patterns compared to Newtonian fluids, resulting in increased mixing.
Brain metastases cause acute cerebrovascular dysfunction due to astrocyte activation, leading to decreased brain perfusion and irreversible damage. Treatment inhibition of this activation restores blood flow, limiting neurological deterioration and potentially improving patient outcomes.
Scientists have discovered a novel mechanism to increase arterial diameter by selectively increasing endothelial cell size, allowing for rapid increases in blood flow. This approach has significant advantages over conventional angiogenesis methods, enabling faster restoration of blood flow and oxygen delivery.
Researchers found abnormalities in brain areas including caudate that normalized after four weeks of CBT, but not in those who didn't receive treatment. Pre-treatment HRF patterns can predict individual patient response to CBT with high accuracy.
Research reveals a correlation between impaired blood flow and tau protein buildup in Alzheimer's disease, suggesting targeting vascular function as a key to prevention and treatment. The study used MRI and PET scans to compare blood flow and tau levels in older adults with varying degrees of cognitive impairment.
Researchers discovered that remote ischemic postconditioning therapy can lead to better recovery outcomes for people who have received clot-busting drugs after a stroke. In the study, 72% of participants who received the therapy had favorable recovery scores compared to 50% of those who did not.
Researchers found that neuronal ATP levels decrease during REM sleep despite increased cerebral blood flow, indicating negative energy balance in neurons. This discovery could lead to novel biomarkers for REM sleep and insights into the brain's energy metabolism.
A team of researchers at the University of Münster has discovered a new mechanism that regulates myocardial distensibility, which is the elasticity of the heart muscle. This mechanism, called UnDOx, is triggered by oxidative stress and changes the stiffness of the cardiac walls.
Men with untreated high blood pressure have poorer penile blood flow than those with normal blood pressure, but treatment reverses the effect. The study also found that certain medications can worsen erectile dysfunction in men with normal or high-normal blood pressure.
A new surgical technique developed by a Yale-led research team improves blood flow in surgically made blood vessels used in dialysis, resulting in longer-lasting and more robust fistulas. The RADAR procedure also reduces complications compared to the standard technique.
A new study found that prenatal Viagra treatment worsened growth-restriction in baby sheep by impairing the fetus' ability to redirect blood flow to essential organs. This impairment occurred despite lower levels of oxygen in the fetal blood, suggesting a potential mechanism underlying increased morbidity observed clinically.
A new study found that 12 weeks of passive leg stretching improved blood flow and reduced stiffness in arteries. This non-invasive technique could serve as a new drug-free treatment for improving vascular health and reducing disease risk.
A new study published in Radiology found that 3D color-flow ultrasound is an effective, noninvasive method for measuring blood flow with high accuracy and reproducibility. The technique overcomes limitations of current methods such as blood pressure and 2D ultrasound, which provide only surrogate metrics or are prone to errors.
A new method allows for the creation of a complex network of microchannels in an extracellular matrix that resembles human tissues. Human endothelial cells were successfully cultured on the surface of the microchannel to form a tube mimicking blood vessels, achieving pulsatile flow under conditions of perfusion and stretch.
Researchers used MRI to investigate blood flow to the placenta in healthy and pre-eclampsia pregnancies, identifying differences in blood flow and a new phenomenon called the 'uteroplacental pump'. This finding could help explain why babies born to mothers with pre-eclampsia are often small and premature.
A Rice University study reveals that blood flow to the brain recovers faster than brain function after a microstroke. The research used advanced neural monitoring technology to measure both blood flow and neuronal recovery simultaneously, showing a significant disconnect between the two processes.
Biomedical engineers at Duke University developed a massive fluid dynamics simulator to model blood flow through the full human arterial system, providing guidance for treatment plans. A new graphical user interface called Harvis allows clinicians to easily explore options without expertise in computer science.
Researchers found that turbulent blood flows react strongly to vessel geometry, leading to higher velocity fluctuations and increased risk of arteriosclerosis. The study suggests a new mechanism for turbulence in cardiovascular flow at lower speeds than previously thought.
Researchers found that advancing glioma cells desynchronize neuronal activity and blood flow changes, affecting neurovascular coupling and potentially leading to seizures. The study provides promising targets for disrupting tumor growth and offers insights into diagnosis and surgical guidance.
Scientists have developed a free computer program called HemoSYS to quantify structural and functional changes in tumor blood flow networks. The tool provides insights into cancer progression and metastasis, potentially accelerating the development of new therapies targeting tumor blood vessels.
Researchers compared oxytocin administration methods to improve treatment for social difficulties. The study found that nasal delivery using a nebuliser reached specific brain areas more effectively than standard nasal spray or intravenous injection.
An international team of researchers has identified genes related to cardiorespiratory function during acute periodic breathing, a condition that occurs in most humans at high altitudes. The study found that genetic variants affecting the response to insufficient oxygen impact the coordination between heart and lung functions.
A new study published in Radiology: Cardiothoracic Imaging found that healthy men and women have distinct blood flow characteristics in their hearts. The research used 4D flow MRI to analyze gender differences in the left ventricle, revealing higher kinetic energy in men and greater strain in women.
A study by Northwestern University found that people with better cardiovascular health in their 20s are more likely to have higher scores on thinking and memory tests, even after adjusting for education level. The researchers also found an association between better cardiovascular health and improved cerebral autoregulation.
Researchers at Harvard Medical School have discovered a control mechanism in the brains of mice that ensures adequate blood flow to areas of heightened neural activity. The study found that arteries actively regulate neurovascular coupling and that the protein Mfsd2a plays a critical role in this process.
Scientists have created a size-adjustable prosthetic heart valve that can be expanded to accommodate growing hearts, reducing the need for invasive surgeries. The device showed good performance in animal studies without impeding blood flow, but longer-term tests are needed to validate its durability.
A small study found that consuming flavanol-rich cocoa improved walking distance and blood flow in patients with peripheral artery disease. The study suggests that cocoa may be a new way to treat PAD, which affects over 8.5 million people nationwide.
Researchers developed an automated AI technique to analyse CMR scan images, precisely quantifying blood flow to the heart muscle. The results showed a strong correlation between reduced blood flow and adverse health outcomes, including death, heart attack, stroke, and heart failure.
Researchers found that a new stimulation treatment increased blood flow to the brain and improved hand strength in patients with minor strokes. The treatment also showed promise in decreasing disability in patients with severe stroke, regardless of age, sex, or severity of symptoms.
Researchers developed a total-body PET/CT scanner with advanced reconstruction techniques to capture radiotracer transport in humans at 100 ms timescales. This approach offers clear images of cardiac blood pool changes throughout the cardiac cycle, enabling real-time motion tracking and neural activity analysis.
Scientists have developed a method to reduce noise and reconstruct images from raw data, capturing ultrafast whole-body dynamic tracer imaging with improved image quality at a timescale of 100 milliseconds.
Researchers at University College London discovered a new mechanism that allows the brain to monitor its own blood supply, potentially leading to new treatments for hypertension and dementia. Astrocytes, specialized brain cells, act as blood flow sensors to regulate brain blood flow and maintain oxygen supply.
Researchers have identified a mechanism that contributes to clot formation in mechanical heart valves. By modifying the valve's design, turbulent vortices can be eliminated, reducing the risk of blood clots and strokes. This breakthrough could lead to life without blood thinners for thousands of people with artificial heart valves.
A study published in Journal of Nuclear Cardiology found that combining Transcendental Meditation with cardiac rehabilitation increases myocardial blood flow by 20.7%. This increase is significantly higher than the 5.8% improvement seen with cardiac rehabilitation alone.
Researchers discovered that exercise increases brain oxygenation by packing more oxygen into the bloodstream, contradicting the long-held assumption that blood is always completely saturated with oxygen. This breakthrough sheds new light on the dynamic relationship between respiration and cerebral oxygenation.
Researchers at American Heart Association Scientific Sessions reveal that e-cigarettes pose significant cardiovascular threats. Contrary to popular belief, e-cigarettes do not appear to be a healthier alternative to traditional cigarettes regarding heart health.
Researchers found rapamycin modifies blood flow and cognitive decline with aging. The study provides evidence that TOR drives loss of synapses and cerebral blood flow during aging.
A high-salt diet can cause cognitive impairment by activating a pathway in the brain that leads to tau protein clumping, according to a new study. The researchers found that this effect is not due to a loss in blood flow to the brain, but rather to the accumulation of tau protein aggregates that interfere with brain cell function.