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The cardiac conduction system is a group of specialized cardiac muscle cells in the walls of the heart that send signals to the heart muscle causing it to contract. The main components of the cardiac conduction system are the SA node, AV node, bundle of His, bundle branches, and Purkinje fibers. The SA node (anatomical pacemaker) starts the sequence by causing the atrial muscles to contract. From there, the signal travels to the AV node, through the bundle of His, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract. This signal creates an electrical current that can be seen on a graph called an Electrocardiogram (EKG or ECG). Doctors use an EKG to monitor the cardiac conduction system's electrical activity in the heart.
Reviewed ByReview Date: 05/16/2011
Steven Kang, MD, Division of Cardiac Pacing and Electrophysiology, East Bay Arrhythmia, Cardiovascular Consultants Medical Group, Oakland, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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What is conducting system of the heart description of the components of the conducting system of the heart site and function?
The cardiac conduction system is the conducting system of the heart.
What are the Fibers of the conduction system of the heart?
Fibers of the conduction system of the heart is called Purkinje fibers
What level of the conduction system does the PR interval result from a delay in?
Sa node
What critical role does the nodal system play in heart physiology?
Normal impulse conduction
What two components of the conduction system constitute the only electrical link between the atria and the ventricles?
The atrioventricular node and the bundle of HIS are the electrical conduction link between the atria and the ventricles.
Fibers of the cardiac conduction system are what kind of specalized tissue?
Muscle ( cardiac Muscle)
What segment of the cardiac conduction system functions as the pacemaker of the heart?
Sinoatrial (SA) Node
What is conducting system of the heart description of the components of the conducting system of the heart site and function?
The cardiac conduction system is the conducting system of the heart.
What areas of the cardiac conduction system make up the AV junction?
AV node and bundle of His
Does the ECG record the electrical stimulation of cardiac muscle by conduction system?
Yes, the ECG records the electrical stimulation of the heart muscle by the conduction system and traces the movement of those impulses.
What portion of the cardiac conduction system has the fastest intrinsic rate?
sino atrial nodes is the fastest intrinsic rate
What can cardiac arrest can result from?
A blockage in one or more of the arteries supplying blood to the heart muscles.
What part of the plant is the conduction system?
Conduction
What does the cardiac system control?
Nervous system and the cardiac walls. (:
Does the heart beat without extrinsic stimulation from the autonomic nervous system?
Yes. The cardiac muscle beats with an intrinsic rhythm. This permits the heart to beat without extrinsic stimulation. The heart begins its rhythm and continues its rhythm, basically until something interrupts it. Interconnecting cardiac muscle tissue which is specially designed to continue the rhythm of the heart's contraction creates the heart's system of conduction. These strands of cardiac muscle tissue keep the heart beating in the rhythm that it begins with without interruption through coordinating action. The cardiac cycle refers to the process which fills and empties the individual chambers of the heart. The system of the heart's conduction enables this cycle to continue without interruption.
What are the Fibers of the conduction system of the heart?
Fibers of the conduction system of the heart is called Purkinje fibers
What are the components of the cardiac conduction system?
The conduction starts at the pacemaker region called the Sinoatrial Node (SA node) which is just under where the superior vena cava enters the right atrium. From here the conduction passes to the Atrioventricular Node (AV node) which is just ot the right of the septum. From here the stimulation is passed through the Bundle of His which carries the conduction to the septum where two Bundle Branches pick it up. These branches carry the conduction to the base of the septum where they sperate into the Purkinje Fibres. These fibres carry the conduction all around the heart.
