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.
The geocentric latitude Ï is the complement of the polar angle Î¸ in conventional spherical polar coordinates in which the coordinates of a point are P(r,Î¸,Î») where r is the distance of P from the centre O, Î¸ is the angle between the radius vector and the polar axis and Î» is longitude.