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WorksheetsHeart's Intrinsic Conduction System
Total questions: 23
Worksheet time: 18mins
If the P wave on an EKG looks abnormal, which structures in the heart are likely damaged?
SA/AV node
Aortic valve
Bundle of His
Purkinje fibers
The p-wave correlates with which event?
atrial depolarization
ventricle depolarization
ventricle repolarization
atrial repolarization
What does depolarization result in?
relaxation
contraction
repulsion
attraction
Intrinsic electrical impulses start at which of the following locations?
AV Node
Bundle of His
Purkinje fibers
SA Node
Which of the following is most likely to occur if there is a blockage to the AV bundle nerve impulse?
the AV Node will not produce electrical impulses
the SA Node will not produce electrical impulses
no effect
the Purkinje fibers will not produce electrical impulses
The pacemaker of the heart
AV node
SA node
Bundle of His
Bundle branches
A cardiac cycle is:
ventricular relaxation
ventricular contraction
equivalent to 1 complete heart beat
a heart attack
What is the second step to heart contraction?
Atria contract
ventricles contract
depolarization of SA node
Impulse spreads throughout the atria
A heart rate 100 bpm or above is called _______.
bradycardia
tachycardia
arrhythmia
fibrillation
The heart layer that keeps blood from sticking to the inside of the heart and forming potentially deadly blood clots is called
endocardium
pericardium
myocardium
epicardium
The SA node fires at a rate of
40-60 bpm
80-90 bpm
60-80 bpm
60-100 bpm
A echocardiogram is a tool that is used to:
Measure the electrical events in a heart beat
Measure the movement of blood through the heart using sound waves
Measure the movement of blood through the heart using X-rays and specific dyes
Measure the oxygenation of your blood
