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• The electrical conduction device of the coronary heart transmits indicators generated generally via the sinoatrial node to cause contraction of the coronary heart muscle. The pacemaking signal generated inside the sinoatrial node travels thru the proper atrium to the atrioventricular node, along the Bundle of His and via package branches to cause contraction of the coronary heart muscle. This sign stimulates contraction first of the proper and left atrium, and then the right and left ventricles. This process permits blood to be pumped at some stage in the body.

• The conduction device includes specialized heart muscle cells, and is situated inside the myocardium. There is a skeleton of fibrous tissue that surrounds the conduction gadget which may be seen on an ECG. Dysfunction of the conduction gadget can motive irregular, speedy, or sluggish coronary heart rhythms.