Mayo Clinic researchers have found that rheumatoid arthritis patients have twice the risk of heart failure, or a weakening of the heart’s ability to pump blood, as those without rheumatoid arthritis, according to a new study to be published in the February edition of the journal Arthritis & Rheumatism. About one-third of the rheumatoid arthritis patients studied developed heart failure over 30 years of the disease.
"We decided to undertake this study because we knew that patients with rheumatoid arthritis die earlier than the general population, and mostly from heart disease," says Paulo Nicola, M.D., Mayo Clinic research fellow in the Department of Health Sciences Research and study author. "We thought heart failure could be a reason for early mortality in these patients. However, we were not expecting that the incidence of heart failure would be so high."
The study found that patients with rheumatoid arthritis are at an increased risk for heart failure soon after the onset of arthritis and that this elevated risk follows them throughout the course of the arthritis, a chronic disease. The researchers also found that the factors putting them at this increased risk for heart failure seem to be unrelated to heart attacks and to the traditional cardiovascular risk factors: diabetes; alcohol abuse; and elevated cholesterol, blood pressure and body mass index. The source of the increased risk remains a mystery, however.
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Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
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Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
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For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
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An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
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A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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