hERG potassium channels are essential for normal ... Figure 1: Multiple ion channel currents shape the cardiac action potential. Figure 3: Reduced hERG current delays ventricular repolarization ...

When electrolytes are too low or too high, the heart cannot contract normally, leading to dangerous arrhythmias and potentially sudden cardiac death. "Electrolyte levels are kept within the ...

Pittsburgh, PA - Scientists have developed new voltage-sensitive dyes that allow them to view and record cardiac action potentials from ... activity of sodium and potassium channels across the ...

A FACTOR of likely importance in the genesis of the long-lasting action potentials of vertebrate heart muscle is the influence of membrane potential on the potassium permeability of the fibres.