0
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.
What else can I help you with?
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.
Does the ECG record the electrical stimulation of cardiac muscle by conduction system?
Yes, an ECG records the electrical activity produced by the heart as it contracts and relaxes. This includes the electrical stimulation of the cardiac muscle by the conduction system, such as the SA node, AV node, and Purkinje fibers.
A group of conducting cells control heart muscle contraction and is known as the?
pacemaker cells
What portion of the cardiac conduction system passes the impulse across the myocardium of both ventricles?
The portion of the cardiac conduction system that passes the impulse across the myocardium of both ventricles is the Purkinje fibers. These fibers distribute the electrical impulse rapidly throughout the ventricular myocardium, ensuring coordinated and efficient contraction of the ventricles. This system allows for synchronized beating of the heart, critical for effective blood pumping.
What can cardiac arrest can result from?
A blockage in one or more of the arteries supplying blood to the heart muscles.
What portion of the cardiac conduction system has the fastest intrinsic rate?
The sinoatrial (SA) node has the fastest intrinsic rate in the cardiac conduction system, typically firing at a rate of 60-100 beats per minute in a healthy heart. It serves as the primary pacemaker of the heart, initiating each heartbeat by generating electrical impulses.
Is a heartbeat a reflex?
No, a heartbeat is not a reflex. It is a coordinated and involuntary contraction of the heart muscle controlled by the heart's own electrical system, known as the cardiac conduction system. Reflexes are typically involuntary responses to stimuli mediated by the nervous system.
What carries cardiac impulses to the myocardium?
Cardiac impulses are carried to the myocardium via specialized muscle cells called Purkinje fibers. These fibers are part of the cardiac conduction system and help to transmit electrical signals rapidly and efficiently throughout the heart muscle.
What does the cardiac system control?
Nervous system and the cardiac walls. (:
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.
