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Latest Cardiac action potential Stories

2011-09-09 13:29:04

Ion channels ensure the heart keeps time The heartbeat is the result of rhythmic contractions of the heart muscle, which are in turn regulated by electrical signals called action potentials. Action potentials result from the controlled flow of ions into heart muscle cells (depolarization) through channels in their membranes, and are followed by a compensating reverse ion current (repolarization), which restores the original state. If the duration of the repolarization phase is not just...

2011-03-14 15:08:05

Did you know that heart attacks can give you mathematics? That statement appears on the web site of James Keener, who works in the mathematics of cardiology. This area has many problems that are ripe for unified attack by mathematicians, clinicians, and biomedical engineers. In an article to appear in the April 2011 issue of the Notices of the American Mathematical Society, John W. Cain, a mathematician at Virginia Commonwealth University, presents a survey of six ongoing Challenge Problems...

2011-03-09 14:40:50

Pacemaker cells in the sinoatrial node control heart rate, but what controls the ticking of these pacemaker cells? New research by Angelo Torrente and his colleagues of the M.E. Mangoni group's, reveals, for the first time, a critical functional interaction between Cav1.3 calcium ion (Ca2+) channels and ryanodine-receptor (RyR) mediated Ca2+ signaling. The study also sheds light on a long-standing debate regarding the relative contributions of the 'funny current' generated by ion channels and...

2010-11-15 13:35:56

Findings pave way for better understanding of abnormal heart rhythms and sudden cardiac death Scientists studying genetic data from nearly 50,000 people have uncovered several DNA sequence variations associated with the electrical impulses that make the heart beat. The findings, reported in Nature Genetics, may pave the way for a greater understanding of the mechanisms for abnormal heart rhythms and sudden cardiac death. "Regulation of the heart's rhythm is exceedingly complex," says...

2008-07-01 06:00:15

Research and Markets (http://www.researchandmarkets.com/research/6a4ece/control_and_regula) has announced the addition of the "Control and Regulation of Transport Phenomena in the Cardiac System" report to their offering. Leading researchers in the life sciences and engineers involved in research of transport phenomena in biological systems have contributed chapters that identify, analyze, and modify the control and regulation mechanisms of transport phenomena in biological systems, with...


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  • To talk saucily.
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This word is Scots in origin and probably imitative.