Heartbeat Mechanism

Everyday our heart still beating. Never stop until it reach the day. How our heart beating? There is a special mechanism happen in the heart. There are some electrical activities in the heart. To understand how heart beating, we have to know the special structure in the heart which is responsible in producing heartbeat.

1. SA node

2. AV node

3. Bundle of His/ Bundle branches

4. Purkinje fibers

All of these structure act as electrical pathway in the heart. These are the explanation how the heart beating.

1. SA node, located at the wall of right atria will produce some electrical signal. 

2. This signal spread to the AV node. AV node is located at the atrioventricular septum. 

3. AV node is stimulated by the signal causes more electrical signal been produced. These signal spread all over the atrial causes the atrial contraction.

4. From AV node, the signal spread to the heart apex via Bundle of His causes the contraction of heart apex.

5. These signal then spread to all over the ventricular muscle along Purkinje fibers causes the contraction of heart ventricular muscle.

These even will be continually happened till the end of our life.