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EKG Medca Exam Questions With Answers
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EKG Medca Exam Questions With Answers
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EKG EXAM QUESTIONS ANDANSWERS
N
EKG or ECG stands for: - Answer electrocardiogram
U
What can an EKG detect? - Answer cardiac arrhythmia or dysrhythmia, ischemia,
electrolyte imbalance, effects of cardiac medications, damage caused by an MI
RS
Define arrhythmia - Answer abnormal cardiac rhythm (think a= without, without rhythm)
Define ischemia - Answer lack of blood supply
IN
What is the electrical pathway of the heart's conduction system? - Answer SA node->AV
node->Bundle of His->Right and Left Bundle Branches->Purkinje fibers
When the SA node is stimulated, what mechanical action happens in the heart? -
G
Answer Atria contract
PI
Where is the SA node located in the heart? - Answer Right Atrium
What has to happen for the ventricles to contract? - Answer Electrical conduction has to
EC
pass through the AV node, down the Bundle of His, through the right and left bundle
branches, into the purkinje fibers. Once they reach the Purkinje fibers, then the
ventricles will contract.
Electrodes - Answer sticky skin sensors that attach to the patient
ES
What is the purpose of the gel on the electrodes? - Answer to read the heart's electricity
and to amplify the waveforms
EKG machine is also called an: - Answer electrocardiograph
Name the 2 types of EKG machines: - Answer Single channel and multichannel
When we do an EKG we are looking at the heart from : - Answer 12 different points of
view or angles
How many electrodes are used to perform an EKG? - Answer 10
, What is an amplifier? - Answer Magnifies the heart's electrical signal so it can be
recorded.
What is the stylus? - Answer records the motion on the graph paper by burning the
impression into the heat-sensitive paper.
Name the limb leads. - Answer RA, LA, LL, RL
What is unique about EKG paper? - Answer It is heat-sensitive and pressure-sensitive.
N
How big is a small block on EKG paper? - Answer 1mm x 1 mm
How big is a large block on EKG paper? - Answer 5mm x 5 mm
U
What speed does normal EKG paper run? - Answer 25mm per second
RS
Why would a CCMA increase the speed of the EKG paper? - Answer If the heart rate
were very fast, the speed would be increased to 50mm per second.
How much TIME does each small square on EKG paper represent? - Answer 0.04
IN
seconds
How much TIME does each large square on EKG paper represent? - Answer 0.2
G
seconds
What is another name for amplitude? - Answer Gain
PI
Define amplitude/gain. - Answer how tall the tracing is. It is represented by 1x, 2x, or 3x.
EC
How big is the normal amplitude/gain on an EKG? - Answer 2 large boxes or 10 small
boxes
On EKG paper, what does the vertical axis represent? - Answer voltage or amplitude
ES
On EKG paper, what does the horizontal axis represent? - Answer time
What is the purpose of standardization? - Answer it is the process of making sure that
an EKG on one machine will compare to the EKG on another machine.
What does the standardization mark look like? - Answer Upside down U or a rectangle
with the bottom out of it, it is 10mm or 2 large boxes high
Name the chest or precordial leads (wires): - Answer V1, V2, V3, V4, V5, V6
What are the leads RA, LA, RL, LL collectively called? - Answer Limb leads
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