Conducting System of the Heart Flashcards
What are the components cardiac conduction system?
SAN, AVN, Atrioventricular bundle (bundle of His), Purkinje fibres
Where is the SAN located?
Upper wall of the right atrium, at the junction where the superior vena cava enters
Where is the AVN located?
within the atrioventricular septum, near the opening of the coronary sinus
How long does the AVN delay impulses by?
120ms
Where is the bundle of His located?
The membranous part of the interventricular septum
What two bundles does the bundle of His divide into?
Right and left bundle branch
Which part of the conducting system are a network of specialised cells, abundant in glycogen, with extensive gap junctions?
Purkinje fibres
Where are the purkinje fibres located?
subendocardial surface of the ventricular walls
