Overview of the Atrioventricular Node (AV Node)

Overview of the Atrioventricular Node (AV Node)

A normal heartbeat begins when a tiny cluster of cells called the sinus node sends an electrical signal

Scientists at The University of Manchester have solved a mystery connected with why people die from sudden cardiac arrest during sleep — potentially saving thousands of lives. The pioneering …

SA node, Av node, AV bundle, AV bundle branches, Purkinje fibers

AV and SA Nodes: Electrical System of the Heart

AV and SA Nodes: The Electical System that Lets Your Heart Work: Heart Nodes

sympathetic and vagal effcts on atrioventricular node action potentials

sympathetic and vagal effcts on atrioventricular node action potentials

Electrical signals fire from multiple locations in the atria, causing abnormal quivering of the atria (1). The atrioventricular node — your heart's natural pacemaker — is unable to prevent all of these chaotic signals from entering the ventricles (2). Your ventricles respond to these extra, chaotic signals by beating faster than normal (3).

Researchers have identified a link between the most common type of irregular heartbeat – atrial fibrillation – and Alzheimer’s disease. Atrial fibrillation (AF) is caused by an upset in the electri…

Triangle of Koch, at the apex of which lies the atrioventricular node.

Triangle of Koch, at the apex of which lies the atrioventricular node.

The Purkinje fibers, also known as subendocardial braches, are cardiomyocytes that are part of the conduction system of the heart. They lie beneath the endocardium and send impulses from the atrioventricular node to the ventricles causing them to contract. This ensures that the heart maintains its consistent rhythm. The Purkinje fibers were named after Jan Evangelista Purkyne, a Czechoslovakian anatomist that discovered these fibers in 1839.

The Purkinje fibers, also known as subendocardial braches, are cardiomyocytes that are part of the conduction system of the heart. They lie beneath the endocardium and send impulses from the atrioventricular node to the ventricles causing them to contract. This ensures that the heart maintains its consistent rhythm. The Purkinje fibers were named after Jan Evangelista Purkyne, a Czechoslovakian anatomist that discovered these fibers in 1839.

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