Simple answer is sinus node
When the SA node in your heart stops functioning properly, then you have to receive a pacemaker, which will take the place of the SA node and set your heart beat for you.
stimulation from the Sino Atrial node: SA node
the Sino Atrial Node (SA Node) is the pace maker of the heart that receives singles from the brain.
The rate of the heart beat is regulated by the SA node (SinoAtrial Node/aka the Pacemaker). It determines how fast the heart pumps by sending electrical signals faster or slower to the rest of the heart.
The heart wouldn't beat at a constant rate.
It regulates a heartbeat in a weak heart by sending an electric charge at intervals to make it beat.
By generating electrical impulses.By: isamarThe individual cells in a heart actually can beat on their own without any nervous stimulus. However, the cells have to beat together to have a heart that functions the right way. There is a conduction system in the heart made of specialized heart cells that make the rhythm. There are two main "nodes" called the SA node and AV node. The SA node starts the beat. The AV node is a sort of back up for the SA node. There are other special heart cells that made up of special fibers that transmits the signal through out the walls of the heart.
cancer and exercise
the SA node (sinoatrial node) stimulates the heart to beat @ a particular rate. when this node causes the heart to beat too fast or too slow or irregularly, a pacemaker (a small mechanical device) is surgically implanted under the skin of the chest to regulate the heartbeat.
if the SA node no longer is functional than the AV node will take over giving the hear a slower 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.