In a healthy heart, the SA node continuously produces action potentials, setting the rhythm of the heart (sinus rhythm), and so is known as the heart's natural pacemaker. The rate of action potentials …

The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions. The atria are then activated. The electrical stimulus travels down through the conduction …

Oct 30, 2023 · The sinuatrial node is one of several structures of the cardiac conduction system. This intrinsic conduction system generates impulses for the contractions of the heart and ensures the …

When your sinoatrial node isn’t working well, the lower segments of your conduction system act as backup pacemaker cells. The SA node is in the upper part of your heart’s right atrium.

Nov 6, 2025 · The sinoatrial (SA) node is a collection of specialised cells (pacemaker cells), and is located in the upper wall of the right atrium, at the junction where the superior vena cava enters. …

Sinoatrial node: key functions, disorders, treatments. Location, structure, physiology, clinical relevance. Heart's natural pacemaker role.

Aug 4, 2025 · At the heart of this electrical system lies a specialized cluster of cells known as the sinoatrial (SA) node. Often referred to as the heart’s natural pacemaker, this small structure is …

1 day ago · What is the Sinoatrial (SA) Node? The SA node is a specialized group of cells located in the right atrium, near the entrance of the superior vena cava. It is responsible for generating electrical …

The sinoatrial node is the primary pacemaker of the heart, responsible for initiating and regulating the cardiac rhythm. Located in the right atrium, it generates spontaneous action potentials that …

Jun 13, 2025 · Q: What is the function of the sinoatrial node? A: The sinoatrial node's function is to generate electrical impulses that trigger the contraction of the heart muscle, resulting in a normal …