(Also called "Sinoatrial [SA] Node.") The Sinus Node is a specialized group of cells in the heart which generates an electrical signal that travels down a single electrical road (the AV Node) connecting the atria to the ventricles. The Sinus Node is called the heart's "natural pacemaker," because it maintains a regular heart beat and makes adjustments to increase the heart rate during exercise and to slow it during rest. See Overview.
A small group of specialized heart muscle fibers located in the wall of the right atrium of the heart that act as a pacemaker by generating at regular intervals the electric impulses of the heartbeat. Reference: H1
The part of the heart which produces the electrical impulses that control the hearts pumping action.
The body's natural "pacemaker," which lies in the heart's right atrium and generates a rhythm of electrical impulses to cause the heart muscle to contract.
the cells that produce the electrical impulses that cause the heart to contract.
the heartâ€(tm)s natural pacemaker, produces electrical impulses to keep the heart beating at a healthy pace by causing the heart to contract and pump blood at regular intervals
the heart's natural pacemaker that produces electrical impulses to keep it beating at a healthy pace. These impulses cause the heart to contract and pump blood at regular intervals.
a group of cells in the heart that produce the electrical impulses that cause the heart to contact.
The sinus node is one of the major elements in the cardiac conduction system, the system that controls the heart rate. This stunningly designed system generates electrical impulses and conducts them throughout the muscle of the heart, stimulating the heart to contract and pump blood. See the entire definition of Sinus node
Origination of the heart's electrical activity, the Sinus Node (or SA Node) is located in the upper portion of the right atrium.
specialized cells that produce electrical impulses that travel to the ventricular muscle causing the heart to contract. Located in the top of the right atrium.