The mechanism by which fat-related molecules called lipids regulate pacemaker ion channel proteins, which help control the heart rhythm, has been revealed in a study from researchers at Weill Cornell Medicine.
Molecular & Computational biology
Nov 9, 2022
0
33
Whole-heart ventricular modeling has come a long way in recent years and is currently witnessing the evolution of a variety of computational approaches, especially within the realm of personalized technologies for patient-specific ...
Molecular & Computational biology
Sep 28, 2021
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37
A new research project uses the Canadian Light Source to help researchers understand the protein responsible for regulating heartbeats. Errors in this crucial protein's structure can lead to potentially deadly arrhythmias, ...
Biochemistry
Jan 14, 2019
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126
Cardiac arrhythmia results when the usual symphony of electric pulses that keep the heart's muscles in sync becomes chaotic. Although symptoms are often barely noticeable, arrhythmia leads to hundreds of thousands of deaths ...
General Physics
Apr 24, 2018
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40
Rice University and Texas Heart Institute researchers are studying the use of soft, flexible fibers made of carbon nanotubes to restore electrical conductivity to damaged heart tissue.
Bio & Medicine
Aug 17, 2015
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62
A new study of dolphins and seals shows that despite their remarkable adaptations to aquatic life, exercising while holding their breath remains a physiological challenge for marine mammals. The study, published January 15 ...
Plants & Animals
Jan 16, 2015
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96
(Phys.org) -- Ion channels, proteins embedded in cell membranes, are central to many of the human body's physiological processes, including cardiac activity. For this reason, they are also important targets for cardiac drugs. ...
Biochemistry
Apr 10, 2012
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0
The next time you take aspirin for a headache, thank a willow tree. Salicylic acid, a compound chemically similar to aspirin, is found in willow tree bark and is made by the plant as a chemical defense against pathogens. ...
Biotechnology
Nov 1, 2011
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0
A new bacterium that uses caffeine for food has been discovered by a doctoral student at the University of Iowa. The bacterium uses newly discovered digestive enzymes to break down the caffeine, which allows it to live and ...
Cell & Microbiology
May 24, 2011
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0
Researchers at Forschungszentrum Jülich and the Berlin Institute of Health at Berlin's Charité Hospital have developed a novel method for determining the number of subunits within protein complexes. The method is a further ...
Biotechnology
Nov 16, 2022
0
8
Cardiac arrhythmia (also dysrhythmia) is a term for any of a large and heterogeneous group of conditions in which there is abnormal electrical activity in the heart. The heart beat may be too fast or too slow, and may be regular or irregular.
Some arrhythmias are life-threatening medical emergencies that can result in cardiac arrest and sudden death. Others cause symptoms such as an abnormal awareness of heart beat (palpitations), and may be merely annoying. Still others may not be associated with any symptoms at all, but predispose toward potentially life-threatening stroke or embolus.
Some arrhythmias are very minor and can be regarded as normal variants. In fact, most people will sometimes feel their heart skip a beat, or give an occasional extra strong beat neither of these is usually a cause for alarm.
The term sinus arrhythmia refers to a normal phenomenon of mild acceleration and slowing of the heart rate that occurs with breathing in and out. It is usually quite pronounced in children, and steadily decreases with age. This can also be present during meditation breathing exercises that involve deep inhaling and breath holding patterns.
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