Flashcards in Electrical activity of heart Deck (13)
Loading flashcards...
1
Period of contraction, force generation and blood expulsion
Systole
2
Period of relaxation, filling with blood, readying for next systole
Diastole
3
Left atrial fibrillation would most greatly affect filling of which other heart chamber?
Left ventricle
4
This is the first to depolarize, and is located in right atrium. What does it do?
SA node, pacemaker which causes atrial contraction
5
True/False: there are gap junctions between an atrial muscle to a ventricle muscle.
False, there are NONE, no comunication
6
A lot of arrhythmia are due to a problem in the________.
AV node
7
AV node ____ conduction.
Slows
8
_______ has large diameter cells and speeds up ventricular myocytes.
Perkinje system
9
With ventricular myocytes ________ occurs.
contraction
10
What is the flow of depolarization?
SA node fires
Atria depolarize
Septum and inner layer of ventricular muscle depolarizes
Ventricles depolarize
Coordination of depolarization allows for maximal blood ejection.
11
How does depolarization start in heart?
Starts at apex in Inter-ventricular septum depolarizes first and then depolarization wave heads up towards atrium
12
SA node is the pacemaker of the heart because why?
it depolarizes the fastest
13
