The action potential is a sudden positive shift in the cardiomyocyte's cellular membrane potential, termed depolarization. Depolarization not only initiates contraction within the affected cardiomyocyte (Described in Cardiac Excitation-Contraction Coupling), but also initiates depolarization of adjacent cardiomyocytes.
Polar Coordinates The coordinate system which depicts the points from the pole to the certain distance at a particular angle is known as âpolar coordinatesâ. The positive horizontal axis in which that particular angle rotates is named as âpolar axisâ.
polar circle - a line of latitude at the north or south poles. horse latitude - either of two belts or regions near 30 degrees north or 30 degrees south; characterized by calms and light-baffling winds. line - a spatial location defined by a real or imaginary unidimensional extent.