An arrhythmia is a problem with the speed or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm. A heartbeat that is too fast is called tachycardia. A heartbeat that is too slow is called bradycardia. Most arrhythmias are harmless, but some can be serious or even life threatening. When the heart rate is too slow, too fast, or irregular, the heart may not be able to pump enough blood to the body. Lack of blood flow can damage the brain, heart, and other organs.
A new peer-reviewed review in Psychedelics opens on a strange fact, gathered from existing laboratory studies rather than new experiments: a brain tumor can learn to eavesdrop.
In a prospective study of 495,269 UK Biobank participants followed for approximately 13 years, researchers found that coffee consumption was associated with a 7% to 11% lower risk of atrial fibrillation (AF), with the strongest association observed at 2–3 cups daily. Tea consumption showed a more modest and less consistent association, with the authors reporting a 5% lower AF risk at 2–3 cups daily, although the observational findings cannot establish causation.
In a cross-sectional analysis of 7,256 adults from the Maastricht Study, researchers found that greater adherence to the DASH and Dutch Healthy Diet patterns was associated with higher very-low-frequency (VLF) heart rate variability power, particularly among participants not taking beta-blockers. No significant associations were observed across time-domain HRV measures after full adjustment, and the findings do not establish that these diets improve cardiovascular function.
The Ohio State University Wexner Medical Center is the first center in the Midwest to enroll and treat a patient in a new clinical trial using a novel device designed to treat recurrent ventricular tachycardia (VT), a serious heart rhythm disorder.
A narrative review published in Nutrition Journal examines how vitamin B12 deficiency may contribute to cardiovascular disease through elevated homocysteine, endothelial dysfunction, oxidative stress and altered methylation. The authors found that B12 supplementation has not consistently prevented heart attacks or cardiovascular deaths in clinical trials, although combined B-vitamin therapy may modestly reduce stroke risk, particularly in populations without folic acid fortification.
Researchers analyzed healthcare records from more than 2.3 million children in California and found that those living in counties with higher lithium concentrations in water sources had 60% higher adjusted odds of a Wolff-Parkinson-White (WPW) diagnosis. A separate New York analysis supported an association at a lower lithium threshol
Researchers from the COR group at the Institute of Information and Communications Technologies (ITACA) of the Universitat Politècnica de València (UPV) have developed an artificial intelligence model capable of localizing and quantifying tissue abnormalities associated with atrial cardiomyopathy using electrical recordings from the body's surface.
People with atrial fibrillation have signs of the condition in the retinas of their eyes that can be detected as early as four years before diagnosis, finds a new study led by University College London (UCL) and Moorfields researchers.
People living with arrhythmogenic cardiomyopathy (ACM), a heritable heart condition that can significantly increase risks for sudden cardiac death, are advised to avoid high-intensity aerobic exercise.
A randomized, double-blind trial found that adults with mild constipation who drank a vinegar beverage daily for four weeks had more frequent bowel movements than those receiving placebo. Exploratory findings also suggested earlier improvements in bowel habits, although the small feasibility-based trial requires confirmation in larger and more diverse populations.
The health of heart attack survivors follows three distinct paths in the five years after their health event, say researchers from the University of Surrey.
Fourth-year veterinary students matched - and experienced clinicians outperformed - an AI-enabled digital stethoscope in diagnosing heart murmurs and arrhythmias in cats and dogs, according to a new study from North Carolina State University.
An estimated 10 million Americans have atrial fibrillation (AFib), according to the National Institutes of Health's National Heart, Lung, and Blood Institute.
Previous studies have found that caffeine is the world's most popular stimulant and psychoactive substance, and coffee is the most common way people consume caffeine.
Investigating breast cancer and atrial fibrillation overlap, this study highlights key risk factors, underscoring the need for integrated prevention approaches.
According to the World Health Organization, cardiovascular diseases claim almost 20 million lives every year and remain the leading cause of death worldwide.
Is vaping bad for my health? As people who use e-cigarettes and their loved ones pose questions like this, growing scientific evidence shows that the answer is yes.
Early detection and timely treatment of heart failure in pregnant or postpartum women are crucial to prevent serious complications, such as irregular heartbeat, stroke and death, according to a new American Heart Association scientific statement, "Heart Failure Occurring in the Perinatal Period."
Researchers analyzed more than 910,000 adults and found that SARS-CoV-2 infection was associated with a higher adjusted risk of new-onset obstructive sleep apnea up to 4.5 years later. The association appeared in both hospitalized and non-hospitalized COVID-19 patients, supporting targeted screening in higher-risk post-COVID groups while highlighting the need for objective sleep testing.
Synthetic cooling ingredients added to e-cigarettes caused abnormal heartbeats (arrhythmias) and increased cardiovascular risk measures in mice and lab-grown human heart cells, according to new independent research published today in Circulation: Arrhythmia and Electrophysiology, a peer-reviewed journal of the American Heart Association.
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