Conduction System Of Heart Flashcards
(16 cards)
What is the primary function of the conducting system of the heart?
Generation of rhythmic electrical impulses and their spread throughout the heart
What are the main components of the conducting system of the heart?
- Sinoatrial node (SA node)
- Atrioventricular node (AV node)
- Bundle of His
- Right & left branches of the bundle
- Purkinje fibres
Where is the SA node located?
Just inferior & lateral to the opening of superior vena cava to the right atrium
What is the role of the SA node in the heart?
It is the pacemaker of the heart
Where is the AV node located?
Subendocardially in the posterior wall of the right atrium and on the interstitial septum
What are the internodal pathways that connect the SA node and AV node?
- Anterior pathway
- Middle pathway
- Posterior pathway
What is the name of the anterior interatrial band?
Bachmann’s bundle
From where does the bundle of His arise?
From the AV node
What does the bundle of His divide into?
Right and left bundle branches
What pathway does the right bundle branch follow?
Through the septum and continues through the moderator band
What is the function of the Purkinje fibres?
They spread out over the ventricular wall
Fill in the blank: The conducting system is made up of specialized _______ muscle fibre type.
Cardiac
True or False: The SA node is situated subendocardially.
False
What is the location of the right bundle branch relative to the anterior wall of the right ventricle?
It reaches and spreads out as Purkinje fibres
What is the moderator band also known as?
Septomarginal trabeculae
Where do the left bundle branch and Purkinje fibres spread?
Over the ventricular wall
