A new brain chemical test that predicts which patients with heart attack symptoms are at higher risk of dying is paradoxically not being used in younger, healthier patients who could benefit the most from the prognostic information provided by this test, according to a new analysis by cardiologists at the Duke Clinical Research Institute (DCRI).
While previous studies have shown that elevated levels of "brain natriuretic peptide" (BNP) in the blood are associated with higher risks of death in heart attack patients, researchers know little about how this new test is actually being used in U.S. hospitals to risk stratify patients with heart attacks.
Natriuretic peptides are produced by the brain and heart tissue where there is hemodynamic stress on the heart as a signal to the kidneys to produce more urine, which in turn reduces the volume of blood fluid, facilitating damaged or weakened heart muscle to pump blood throughout the body. Larger elevations of BNP levels have been previously shown to be associated with an incremental increase in the risk of mortality for heart attack patients.
Richard Merritt | EurekAlert!
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13.12.2017 | Wyss Institute for Biologically Inspired Engineering at Harvard
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
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Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
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The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
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With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
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