Conducting system of the heart Flashcards
1
Q
What area initiates the action potential of the heart beat?
A
Sino-atrial node
2
Q
Where is the sino-atrial node located?
A
Upper wall of the right atrium- at the where the superior vena cava enters
3
Q
What occurs as a result of the SA nodes impulse?
A
Atrial systole. Blood moves from atria to ventricles
4
Q
After atrial systole, where do the impulses converge?
A
Atrioventricular node
5
Q
How long does the AV node delay the electrical impulse and why is there a delay?
A
120ms- to allow the atria to empty
6
Q
What connects the AVN to the purkinje fibres?
A
Bundle of His
