cardiac conduction -physiology Flashcards
1
Q
what does the SA node contain
A
pacemaker cells
2
Q
What is the path that the electrical current follows in the heart?
A
SA->AV-> bundle of His-> bundle branches-> Purkinje fibres
3
Q
what is the resting potential for SA nodal cells
A
they do not have a stable resting potential
4
Q
why is there a delay in conduction of AV node
A
conduction velocity slows down to allow time for ventricular filling
5
Q
what is plan B if the SA node doesn’t work?
A
other part of the atria take over
6
Q
what is plan C if the SA node doesn’t work
A
the AV node will take over
7
Q
what is plan D if the SA node doesn’t word
A
the His-purkinge fibres take over
