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.
Absolute coordinates. Absolute coordinates are coordinates that reference the position of an object with respect to an origin in a given coordinate system. Normally, coordinates are expressed as tuples (ordered sets of elements) using numbers, but they may also use letters, alphanumeric strings, or other designators.