Is the bundle of his is known as the natural pacemaker of the heart?

Are the purkinje fibers commonly known as the natural pacemaker?

No, the purkinje fiber is not the natural pacemaker. The sinoatrial node (SA node) is the natural pacemaker of the heart.

What are the group of cells that ajust the heart beat?

The pacemaker is only used during a procedure that places an artificial pacemaker in your chest to make your heart beat regular. That is only when the person's heart is having irregular heart beats. People with regular heartbeats with no artificial pacemaker....the way that the heartbeat is regular is through The SA node (sinoatrial). It is a group of cells that is located in the right atrium and sets the pace for the heart, increasing and decreasing when it is needed.

What is the back-up pacemaker of the heart?

The sinoatrial node is known as the pacemaker of the heart.

Why the sino atria node is regarded as a pacemaker in the heart?

The sinoatrial, or SA, node is known as the pacemaker of the heart. There are other potential pacemakers if the SA node fails, but it is the main pacemaker.

What component of the heart's conduction system is considered to be the heart's pacemaker?

Furkinje Fibers

Which is the area of specialized nervous tissue in the heart that is known as the pacemaker of the heart?

sinoatrial node

What is primary pacemaker of heart?

The human heart started out as a enlarged blood vessel that appears as two blood vessels coming together. The heart is comprised of four chambers two small chambers called the atrium and two large chambers known as the ventricles. There are several tissue layers of the heart. The internal layer is known as the endocardium the muscle layer is known as the myocardium, and the outer layer is known as the epicardium. There is an outermost sac called the pericardium that makes up a cavity in the thoracic cavity known as the mediastinum. There are specialized conducting cells or tissue within the myocardium of the heart. These specialized tissue performs the electrical conduction of the heart. The first is the sinoatrial node or the SA node found in the right upper atrium, the next one is the atrioventricular node or the AV node found in the right lower atrium. Then there is a group of this tissue known as the bundle of His or AV bundle (found in the wall of the ventricular septum (the dividing wall between the two ventricles)) and then the right and left buncle branches ( found also in the wall of the intraventicular septum and the outer ventricles) until you come to the purkinjie fibers at the end in the walls of the ventricles. The primary pacemaker of the heart is the SA node and depending on what is going on with the heart as far as damage the secondary pacemaker is the AV node, however the bundle of His could become a pacemaker site or the right and left bundle branches. The lower you go in the pacemaker sites the slower and less able the heart is to conduct proper electrical stimulation to effect the heart conduction and contraction (beat of the heart). Dr. Rick Reed

What is a BBB in the heart?

This si known as a Bundle Branch Block - and refers to an anomaly of a blockage in the nerve system of the heart at the bundle branches.

A group of conducting cells control heart muscle contraction and is known as the?

pacemaker cells

Why does the heart have the Bundle of His and the Purkinje fibers?

The bundle of His and the Purkinje fibres are part of the conduction system of the heart. In order to pump blood around the body, the heart muscle must contract (atria first to fill the ventricles, then ventricles contract to send the blood around the body.) The conduction system starts in the sinoatrial node (SA node) which is also known as the hearts natural pacemaker and is located at the top of the right atrium. The impulse is then sent to the atrioventricular node (AV node) located by the junction between the atria and ventricles. The next part of the conduction system is the bundle of His which sends the impulse from the atria to the ventricles. The purkinje fibres then spread through the ventricles. As the impulse passes through each part of the conduction system, that part of the heart is excited and the heart muscle contracts, which gives the pumping action of the heart.

What is the main section of the heart that initiats the cardiac cycle also known as the pacemaker?

Sinoatrial node, or SA node.

What is the name for the specific part of the heart which sets the rate at which the heart will beat?

The pacemaker of the heart is known as the sinoatrial (SA) node. It sets the rate at which the heart will beat without any autonomic stimulation, that is, no sympathetic or parasympathetic activity. Increases in sympathetic activity will increase the heart rate while increases in parasympathetic activity decrease heart rate. The pacemaker of the heart is known as the sinoatrial (SA) node. It sets the rate at which the heart will beat without any autonomic stimulation, that is, no sympathetic or parasympathetic activity. Increases in sympathetic activity will increase the heart rate while increases in parasympathetic activity decrease heart rate. The pacemaker of the heart is known as the sinoatrial (SA) node. It sets the rate at which the heart will beat without any autonomic stimulation, that is, no sympathetic or parasympathetic activity. Increases in sympathetic activity will increase the heart rate while increases in parasympathetic activity decrease heart rate.