ker is a microscopic bundle of specialised cells located in the top right corner of the heart. Any portion of the heart muscle can generate electrical impulses, but in normal function the original pulses originate from the pacemaker. Impulses are transmitted through muscle fibres of the two atria ventricular node, located on the junction between the right and left sides of the heart.
             From the rioventricular node, they travel along the bundle of His and along the purkinje fibres pathways (named after the scientists who first discovered them).
             Electrical activity coordinates the rhythmic contraction and relaxation of the hearts chambers known as the cardiac cycle. The cardiac cycle consists of two phases, which are called Diastole and Systole. Diastole, during which the hearts ventricles are relaxed, is the longer phase, which takes up approximately two thirds o
             ...