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EKG EXAM – QUESTIONS WITH CORRECT SOLUTIONS
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EKG EXAM – QUESTIONS WITH CORRECT SOLUTIONS
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EKG EXAM – QUESTIONS WITH CORRECT SOLUTIONSEKG or ECG stands for: ✔️Ans - electrocardiogram
What can an EKG detect? ✔️Ans - cardiac arrhythmia or dysrhythmia,
ischemia, electrolyte imbalance, effects of cardiac medications, damage
caused by an MI
Define arrhythmia ✔️Ans - abnormal cardiac rhythm (think a= without,
without rhythm)
Define ischemia ✔️Ans - lack of blood supply
What is the electrical pathway of the heart's conduction system? ✔️Ans -
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? ✔️Ans - Atria contract
What has to happen for the ventricles to contract? ✔️Ans - Electrical
conduction has to 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 ✔️Ans - sticky skin sensors that attach to the patient
What is the purpose of the gel on the electrodes? ✔️Ans - to read the
heart's electricity and to amplify the waveforms
EKG machine is also called an: ✔️Ans - electrocardiograph
Name the 2 types of EKG machines: ✔️Ans - Single channel and
multichannel
When we do an EKG we are looking at the heart from : ✔️Ans - 12
different points of view or angles
, How many electrodes are used to perform an EKG? ✔️Ans - 10
What is an amplifier? ✔️Ans - Magnifies the heart's electrical signal so it
can be recorded.
What is the stylus? ✔️Ans - records the motion on the graph paper by
burning the impression into the heat-sensitive paper.
Name the limb leads. ✔️Ans - RA, LA, LL, RL
What is unique about EKG paper? ✔️Ans - It is head-sensitive and
pressure-sensitive.
How big is a small block on EKG paper? ✔️Ans - 1mm x 1 mm
How big is a large block on EKG paper? ✔️Ans - 5mm x 5 mm
What speed does normal EKG paper run? ✔️Ans - 25mm per second
Why would a CCMA increase the speed of the EKG paper? ✔️Ans - 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? ✔️Ans
- 0.04 seconds
How much TIME does each large square on EKG paper represent? ✔️Ans
- 0.2 seconds
What is another name for amplitude? ✔️Ans - Gain
Define amplitude/gain. ✔️Ans - how tall the tracing is. It is represented
by 1x, 2x, or 3x.
How big is the normal amplitude/gain on an EKG? ✔️Ans - 2 large boxes
or 10 small boxes
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