The downward slope - Conduction of the heart - AVN
3 important questions on The downward slope - Conduction of the heart - AVN
Where is the AVN located?
Posterior wall of the right atrium- exactly behind the tricuspid valve
What is the delay in the conduction of the impulse at the AVN?
When the signal reaches the AVN, there is a slight delay before ventricular contraction- this is to allow time for ventricular filling.
0.03 secs for the impulse to travel from the SAN to the AVN
0.09 secs delay at the AVN
0.04 in the AVN bundle branches
- It therefore takes around 0.16secs for the signal to reach the ventricles from the time the impulse is generated.
0.03 secs for the impulse to travel from the SAN to the AVN
0.09 secs delay at the AVN
0.04 in the AVN bundle branches
- It therefore takes around 0.16secs for the signal to reach the ventricles from the time the impulse is generated.
What causes the delay in the conduction of the impulse from the SAN to the AVN?
There is a diminished number of gap junctions between adjacent cells. Therefore, there is a greater resistance in the conduction of the impulse.
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