The sinoatrial node (also known as the sinuatrial node, SA node, sinus node or Keith–Flack node) is an oval shaped region of special cardiac muscle in the upper back wall of the right atrium …

An electrical stimulus is generated by the sinus node (also called the sinoatrial node, or SA node). This is a small mass of specialized tissue located in the right upper chamber (atria) of the heart.

Jul 22, 2025 · The sinoatrial (SA) node is the heart’s natural pacemaker, responsible for initiating the electrical impulses that lead to a heartbeat. This small cluster of specialized cells …

Oct 30, 2023 · The sinoatrial node, better known as the sinuatrial or SA node is the key structure responsible for the generation of a regular heartbeat and is therefore often referred to as the …

Apr 29, 2025 · SND causes symptoms such as fatigue, dyspnea on exertion, lightheadedness, presyncope, and syncope. The clinical manifestations and diagnosis of SND will be reviewed …

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 …

The sinuatrial node (also commonly spelled sinoatrial node, abbreviated SA node or SAN, also called the sinus node) is the impulse-generating tissue located in the right atrium of the heart, …

Sinus node dysfunction affects mainly older adults, especially those with another heart disorder or with diabetes. The most common cause is formation of scar tissue (fibrosis) in the sinus node.

The sinus node is a crescent-shaped structure that resides subepicardially with its long axis parallel to the terminal groove starting at the junction of the superior vena cava and the right …

Apr 30, 2022 · From the sinus node, electrical signals travel across the atria to the ventricles, causing them to contract and pump blood to the lungs and body. Typically, the sinus node …