Coronary artery anatomy. a) Left coronary artery and b) Right coronary artery…

Coronary artery anatomy. a) Left coronary artery and b) Right coronary artery…

Red blood cells tightly packed in a capillary from the heart muscle. A small Purkinje fiber (blue) is present on the surface of the capillary. Purkinje fibers are modified cardiac muscle fibers that originate from the atrioventricular node and spread into the two ventricles. They transmit the electrical impulse from the atrioventricular node to the ventricles enabling an almost simultaneous contraction.

Red blood cells tightly packed in a capillary from the heart muscle. A small Purkinje fiber (blue) is present on the surface of the capillary. Purkinje fibers are modified cardiac muscle fibers that originate from the atrioventricular node and spread into the two ventricles. They transmit the electrical impulse from the atrioventricular node to the ventricles enabling an almost simultaneous contraction.

Overview of the Atrioventricular Node (AV Node)

Overview of the Atrioventricular Node (AV Node)

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

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).

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).

medicalschool:  A graphical representation of the Electrical conduction system of the heart showing the Sinoatrial node, Atrioventricular node, Bundle of His, Purkinje fibers, and Bachmann’s bundle.

medicalschool: A graphical representation of the Electrical conduction system of the heart showing the Sinoatrial node, Atrioventricular node, Bundle of His, Purkinje fibers, and Bachmann’s bundle.

993.609.1: Lantern Slides, Pathology of the Heart. Diagrammatic representation of the conduction-system: 1, Sino-auricular node; 2, atrioventricular node; 3, bundle of His.

993.609.1: Lantern Slides, Pathology of the Heart. Diagrammatic representation of the conduction-system: 1, Sino-auricular node; 2, atrioventricular node; 3, bundle of His.

During normal sinus rhythm (NSR), the cardiac impulse originates in the sinus node in the atria and spreads through the atrioventricular node to the bundle branches in the ventricles (left). During atrial fibrillation, millions of wandering wavelets randomly migrate through the atria, producing an irregular heartbeat (right). (Infographic c/o Capital Cardiology)

During normal sinus rhythm (NSR), the cardiac impulse originates in the sinus node in the atria and spreads through the atrioventricular node to the bundle branches in the ventricles (left). During atrial fibrillation, millions of wandering wavelets randomly migrate through the atria, producing an irregular heartbeat (right). (Infographic c/o Capital Cardiology)

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.

File:Cystic tumour of the atrioventricular nodal region - high magnification  I selected this image as the atrioventricular node contributes to the regulation of heartbeat

File:Cystic tumour of the atrioventricular nodal region - high magnification I selected this image as the atrioventricular node contributes to the regulation of heartbeat

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

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

Sinoatrial node low magnification  The sinoatrial node works with the atrioventricular node to regulate heartbeat

Sinoatrial node low magnification The sinoatrial node works with the atrioventricular node to regulate heartbeat

#AFib Follow-Up Care  Control Heart Rate Controlling heart rate can help reduce the risk for heart attack and other serious heart problems in people with AFib. Medications, such as beta blockers and calcium channel blockers, or a procedure called atrioventricular node (AVN) ablation and permanent pacemaker implantation can be used to control heart rate.

#AFib Follow-Up Care Control Heart Rate Controlling heart rate can help reduce the risk for heart attack and other serious heart problems in people with AFib. Medications, such as beta blockers and calcium channel blockers, or a procedure called atrioventricular node (AVN) ablation and permanent pacemaker implantation can be used to control heart rate.

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