EKG Flashcards
1
Q
What is conduction?
A
The speed at which cells propagate electrical wavefronts
2
Q
The fibrous ring that supports the mitral and tricuspid valves is a(n) _______
A
Electrical insulator
3
Q
Depolarization can only travel from the ______ to the _____
A
Atria to the ventricles
4
Q
Where is the SA node located?
A
The junction of the superior vena cava with the upper part of the right atrium
5
Q
What is the heart’s pacemaker?
A
SA node
6
Q
After the SA node, where does the depolarization wavefront go?
A
It spreads down from the SA node to the base of the right atrium and spreads to the left atrium over Bachmann’s bundle
7
Q
The complete depolarization of the atria causes what on the EKG?
A
P wave
8
Q
A normal P wave is less than ____ ms wide
A
200 ms
9
Q
A normal P wave is smaller than ___ mV in amplitude
A
1
10
Q
A
