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2025-02-18T11:12:51Z

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← Older revision		Revision as of 11:12, 18 February 2025
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	[[Category:Cardiac anatomy]]		[[Category:Cardiac anatomy]]
	{{Cardiology-stub}}		{{Cardiology-stub}}
			<gallery>
			File:Cardiac_Conduction_System.jpg\|Cardiac conduction system
			File:Basic_representation_of_cardiac_conduction.gif\|Basic representation of cardiac conduction
			File:ConductionsystemoftheheartwithouttheHeart-en.svg\|Conduction system of the heart without the heart
			File:Shapes_of_the_cardiac_action_potential_in_the_heart.svg\|Shapes of the cardiac action potential in the heart
			File:ECG_Intervals.svg\|ECG intervals
			File:ECG_Principle_fast.gif\|ECG principle
			</gallery>

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2024-03-05T17:07:33Z

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'''Cardiac Conduction System'''

The [[Cardiac conduction system]] is a complex network of specialized cardiac muscle cells that initiate and coordinate the contraction of the heart muscle. This system ensures that the heart beats in a coordinated and effective manner, thereby facilitating efficient blood flow throughout the body.

== Structure ==

The cardiac conduction system consists of several key components:

* The [[Sinoatrial node]] (SA node), often referred to as the heart's natural pacemaker, initiates each heartbeat and determines heart rate.
* The [[Atrioventricular node]] (AV node) slows the electrical signal before it enters the ventricles, allowing the atria to contract before the ventricles.
* The [[Bundle of His]], a pathway that transmits the electrical signals from the AV node to the ventricles.
* The [[Purkinje fibers]], which spread the electrical impulse throughout the ventricles, causing them to contract and pump blood.

== Function ==

The cardiac conduction system controls the heart rate and rhythm. The SA node generates an electrical impulse that spreads through the atria, causing them to contract and pump blood into the ventricles. The electrical impulse then reaches the AV node, where it is delayed before being transmitted to the ventricles through the Bundle of His and Purkinje fibers. This delay allows the ventricles to fill with blood before they contract.

== Clinical significance ==

Disorders of the cardiac conduction system can lead to arrhythmias, or irregular heart rhythms. These can range from harmless to life-threatening. Some common arrhythmias include [[atrial fibrillation]], [[ventricular tachycardia]], and [[heart block]]. Treatment options for arrhythmias include medication, [[cardiac ablation]], and the implantation of a [[pacemaker]] or [[implantable cardioverter-defibrillator]] (ICD).

== See also ==

* [[Electrocardiogram]]
* [[Cardiac cycle]]
* [[Cardiac electrophysiology]]

== References ==

{{reflist}}

[[Category:Cardiology]]
[[Category:Electrophysiology]]
[[Category:Cardiac anatomy]]
{{Cardiology-stub}}

Cardiac conduction system - Revision history

Prab: CSV import

Prab: CSV import