What is Sinus Node? - A Detailed Description on What is Sinus Node

In proper term, what is sinus node? Sinus node generates electrical impulses and conducts them throughout the muscle of the heart, thereby making the heart to contract and push blood throughout the body. It is rudimentary to transmitting the blood throughout the system. It is otherwise called the pacemaker. The term sinus node was first coined in 967. It is situated in the upper chamber of the heart and electrical impulses are produced there. It is also called SA node in short. These signals move from each cell to reach the atrioventricular node (AV node). A group of cell is placed in the center of the heart between the atria and ventricles. From the AV node it passes to the ventricles along special fibers embedded in the walls.

Simply, it is cells residing in the atrium of the heart. The atrium is where the electrical impulses start. They perform diverse functions. It is the natural pacemaker of the heart which is intended to contract and expand for pumping blood into the arteries and Venacava. They conduct electrical impulse all over the muscular region of your heart.

A view of sinus node

In an overall view on what is sinus node. It is a quick atrial rhythm, but in a broader sense it includes sinusitis arrest, atrial fibrillation, exit blocks etc.

The automatic nervous system controls the blood pressure and triggers cardiac cycle. They can transmit message quickly, thereby increasing the heart rate twice the normal. This response is required during exercises to increase the heart beat to increase the need for oxygen.

So, what is sinus node dysfunction? It is called sinusitis, which means the cells are not functioning properly to conduct the heart rhythm. This disease is complicated and seldom occurs. The ratio is 3:5000.

So, if hereafter somebody asks you what is sinus node, do not get confused, explain that it is a pacemaker of the heart which helps in pumping blood to the arteries.

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