Question

What is considered to be the natural pacemaker of heart?

Answer 1

Natural pacemaker of the heart:

1. The natural pacemaker of the heart is the sinoatrial node (SA node).
2. The electrical action propagates through the atria’s walls, causing its contraction.
3. The impulse starts in the SA node, a small cluster of unique cells located in the right atrium.
4. This propels the blood into the ventricles. The SA node marks the rhythm and pace of the heartbeat.
5. The normal rhythm of the heart is usually called the normal sinus rhythm as the SA (sinus) node regularly fires.
6. The sinus node consists of a cluster of cells that are situated in the upper part of the wall of the right atrium.