How can a medical assistant alleviate the patients fear of the test?

allow them to ask any questions and voice concerns

A cardiac cycle is detected on the ECG monitor, but the patient has no pulse. This is known as

Pulseless Electrical Activity (PEA)

Where are electrodes placed during a routine electrocardiography?

Right arm, right leg, left arm, left leg, six on chest

Which is a cause of a wandering baseline?

Poor skin preparation, dangling wire, or breathing movement

The correct placement of V4 is

At the fifth intercostal space at the midclavicular line

The P-R interval on an EKG tracing represents

the time it takes for the impulse to travel from the SA node to the AV node

When a patient with a pacemaker has an ECG performed, the strip will contain

small spikes where a P wave may not be seen.

To prevent a wandering baseline artifact, the ECG technician should ensure the patient is

cleansed with alcohol prep pads.

Where should the V4 electrode be placed on the body?

left midclavicular line, 5th intercostal space

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NHA CET Practice

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Questions 80

Answers

1
When placing electrodes for an EKG test, the site should be all of these except
moist
dry
clean
smooth
2
The chest lead V1 is located at the ______ intercostal space
Midclavian
Fourth
Fifth
Third
3
How can a medical assistant alleviate the patients fear of the test?
reassure the patient that they may move freely during test
allow them to ask any questions and voice concerns
tell the patient a small amount of electricity is going to run through them
tell the patient the test will only take about 2 hours
4
Because the skin does not conduct electricity well______ is needed with each electrode
a grounding pad
alcohol
an electrolyte
hydrogen peroxide
5
The ECG strip shown below indicates
an AV block
An SA block
an atrial paced rhythm
A ventricular paced rhythm
6
A flat line on an EKG tracing is usually caused by
detached or loose wires
muscle movement
electrical interference
poor skin prep
7
The medical assistant should use the following technique when routinely cleaning the EKG cables
Disinfect
Sterilize
Sanitize
No cleaning just be gross
8
Which of the following rhythms is shown in the strip below?
Ventricular tachycardia
Agonal rhythm
Tigemini
Ventricular fibrillation
9
In the event an ECG technician recognizes idioventricular rhythm on an ECG printout, how should the technician respond?
Ask the patient to take several deep breaths.
Notify the physician.
Administer oxygen.
Call a code.
10
What should be done if the EKG tracing is showing somatic interference
remind the patient to be still
turn off or unplug appliances in the room
connect a loose wire
Reschedule
11
Which of the following is the correct classification for the strip shown above?
Irregularly irregular
Regularly regular
Regularly irregular
Irregularly regular
12
Which of the following cardiac arrythmias resembles a "saw tooth"
Premature ventricular contraction
V-Fib
a bundle branch block
Bradycardia
13
Where should electrodes for limb leads be placed?
the shoulders and ankles
bony prominences on each limb
face
fleshy parts of limbs
14
A cardiac cycle is detected on the ECG monitor, but the patient has no pulse. This is known as
Asystole
Ventricular Fibrillation
Pulseless Electrical Activity (PEA)
Atrial Tachycardia
15
The time from ventricular depolarization through repolarization is represented by the
QT interval
PR interval
PR segment
QRS complex
16
Which of the following arrythmias on an EKG is most severe
V-FIB
PVC
Bradycardia
A-FIB
17
Blood pressure measures cardiovascular function by measuring the force of blood exerted on
venules
veins
arteries
capillaries
18
Reminding patients to not talk/ move and keeping them warm during the ECG procedure are important to help eliminate
wandering baseline
AC interference
loose electrodes
somatic tremor artifact.
19
A patient with dyspnea comes in for an ECG. Which of the following positions should the patient be placed in?
Sims
supine
semi-fowlers
trendelenburg
20
Which wave is missing when a PVC appears on the EKG?
U
P
S
R
21
Where are electrodes placed during a routine electrocardiography?
Right arm, right leg, left arm, left leg, six on chest
right leg, left leg, six on chest
Right arm, right leg, right hip, left arm, left leg, four on chest
right arm, left arm, right leg, six on chest
22
Which is a cause of a wandering baseline?
loose wires or short circuit in wires
Improper grounding or cardiac arrest
improper mounting
Poor skin preparation, dangling wire, or breathing movement
23
Which of the following is the small upward curve representing repolarization of the ventricles?
QRS complex
P wave
T wave
U wave
24
Which of the following is characterized by rapid incomplete contractions of the atria?
premature atrial contractions
ventricular fibrillation
atrial fibrillation
paroxysmal atrial tachycardia
25
To correct a wandering baseline, the ECG technician should
have the patient remove jewelry.
secure loose electrodes.
unplug the electrical equipment around the ECG.
replace broken cables.
26
If the tracing is not what is expected when performing an EKG on a patient, you should first check
Electrical interference
the status of your patient
The electrodes- are they loose?
the settings of the EKG machine
27
Three big boxes between the R-R intervals indicates
0.20 seconds
100 bpm
1.0 seconds
75 bom
28
An ECG reveals a possible delay in electrical conduction from the SA node to the AV node. This is observed in
the P wave
the QRS segment
the ST segment
the PR segment
29
Which does not cause artifcats on an EKG?
poor conduction
outside interference
patient movement
clean sensors
30
Ventricular pacemaker cells are found at the
right bundle branch.
Purkinje fibers.
SA node.
left bundle branch.
31
The correct placement of V4 is
At the fifth intercostal space at the midclavicular line
At the fourth intercostal space at the midaxillary line
the fifth intercostal space at the midaxillary line
The sixth intercostal space at midclavicular line
32
The best way to access heart rhythm or the regularity of the heartbeat is by
cardiac catheterization
cardiac stress test
electrocardiogram
echocardiogram
33
The P-R interval on an EKG tracing represents
the time it takes for the impulse to travel from the SA node to the AV node
The time it takes for the ventricles to recover
The impluse traveling down the septum to the Purkinje FIbers
the impulse going through the ventricles
34
The transmission of the electrical impluse in the heart begins in
the AV node
the bundle of his
the purkinje fibers
the SA node
35
Which arrythmia has unidentifiable P waves because of rapid electrical signals that originate in ectopic areas?
bundle branch block
ventricular tachycardia
PACs
atrial fibrilation
36
The precordial EKG leads are also know as
chest leads
limb leads
augmented leads
ground leads
37
When a patient with a pacemaker has an ECG performed, the strip will contain
small spikes where a P wave may not be seen.
an introverted T wave.
large spikes where a QRS complex is absent.
an elevated ST segment.
38
The EKG grounding lead is attached to the
right arm
right leg
left arm
left leg
39
Modified electrode placement is necessary for which of the following special circumstances?
amputated limb
breast implants
ventral burn scarring
L ventral wall abnormalities
40
Which of the following patient conditions requires the lead placement shown in the diagram above?
Dextrocardia
Left sided mastectomy
Left sided chest tube
Pregnancy
41
Which of the following represents the pressure of the heart as it relaxes between beats?
systolic murmur
pulse pressure
diastolic pressure
systolic pressure
42
The P wave represents the
resting phase of the heart
last waveform of the EKG complex
atrial depolarization
ventricular repolarization
43
To prevent a wandering baseline artifact, the ECG technician should ensure the patient is
cleansed with alcohol prep pads.
moved away from the wall if in a hospital bed.
positioned with his hands under the buttocks.
not wearing any metal jewelry.
44
Which of the following chambers of the heart is responsible for pumping blood through the aorta to the body?
right ventricle
right atrium
left ventricle
left atrium
45
Lead V3 is located
at the second intercostal space at the left margin of the sternum
4th intercostal space at the right of the clavicle
6th intercostal space and left midclavicular line
midway between V2 and V4
46
The patient should be placed in what position during the EKG test
sitting
Supine
Prone
lithotomy
47
Patients are restricted from doing which of the following while wearing a Holter monitor?
exercise
sexual activity
smoking
showering
48
Where should the V4 electrode be placed on the body?
right midclavicular line, 5th intercostal space
left midclavicular line, 5th intercostal space
left midaxillary line, 5th intercostal space
right anterior axillary line, 5th intercostal space
49
If the arm limb electrodes are reversed on the patient, where on the ECG tracing will this change be depicted?
II and AVL
I and AVL
II and AVR
I and AVR
50
A penlike instrument that recorsd movement on the EKG paper is a
ampule
decibel
lead
stylus
51
Which of these is the only factor that does not require consideration when placing EKG electrodes on a patient
patient ethnicity
patient piercings
patient stents
patient scars
52
Einthoven's Triangle is made of the following groups:
Leads aVR, aVL, aVF
Leads V1, V2, V3
The precordial leads
Leads 1, 2, 3
53
Which of the following valves separates the left atrium from the left ventricle?
pulmonic
tricuspid
aortic
bicuspid
54
Which of the following represents the time between contraction of the ventricles and recovery
PR-interval
Q wave
P wave
S-T segment
55
Which of the following is classified as the most dangerous arrhythmia?
Premature ventricular contraction
Premature atrial contraction
Ventriucular fibrillation
Atrial fibrillation
56
Which of the following should be included in the medical history taken prior to an ECG?
current medications
smoker versus non-smoker status
SPO2
fasting status
57
A medical assistant needs to recognize abnormal heart rhythms because
They need to take control of the emergency
They need to administer medications to correct it
They need to alert the doctor/nurse that the patient has an irregular EKG
They need to triage the medical emergency
58
which of the following represents the relaxation of the ventricles
QRS complex
P wave
Q wave
T wave
59
To properly prepare patient for EKG....
Make them comfortable and reassure the procedure is painless
Place electrodes over bony parts of limbs where activity's easily conducted
Place ground electrode on left leg
stockings removed to allow electrodes to be placed on the leg
60
The ECG tech is preforming a 12-lead ECG and notices the lead III does not appear on tracing. They should
Add an extra electrode to the intercostal space
Ask the patient to lie Sith to reduce somatic interference
Check for loose wire, reconnect, and repeat the tracing.
Re-center the stylus and repeat the tracing.
61
The noninvasive procedure that measures oxygen saturation is
EKG
pulse oximetry
Electrocardiogram
arterial blood gas
62
which of the following is an expected finding of impaired conduction through the AV node
prolonged QRS interval
prolonged PR interval
prolonged QT interval
Prolonged ST interval
63
Which of the following precautions should the ECG technician take for a patient with dormant tuberculosis?
Contact
Airborne
Standard
Droplet
64
What does the QRS complex represent?
refractory period of the ventricles
repolarization of the ventricles
depolarization of the ventricles
depolarization of the atria
65
When performing an ECG on a pregnant woman in her third trimester the ECG technician should place the
patient on her right side and lower limb leads on the lower abdomen.
lower limb leads on the patient's side.
patient on her left side and lower limb leads on her upper thighs.
lower limb leads on the patient's ankles.
66
What does AC interference mean in an EKG tracing?
Theres a loose electrode
The patient is stupid
The patient is shivering
There is electrical interference in the room
67
A patient is at risk of electrocution during an EKG if you havent verified that the machine is
cleaned
contaminated
grounded
calibrated
68
A patient with a left arm amputation comes in for an ECG. What is the proper placement for the left arm lead?
Moved to the back of the left shoulder moving the right lead to match
As close to the site as possible, higher on the limb, in similar position
A. Moved to the back side of the left shoulder and in a similar position
A. The same as it would be for a patient without a left arm amputated
69
Which is used to monitor the electrical activity over an extended period of time (24 hrs or more)?
Holter monitoring
stress test
Echocardiogram
cardiac catherterization
70
Which of the following should the ECG tech check and reapply first when multiple artifacts appear in Leads I and II?
R Arm
R Leg
L Arm
L Leg
71
THe process of using ultrasound to view the heart in motion is
echocardiography
Fluoroscopy
electrocardiography
Radiotherapy
72
Lead ll of the EKG tracing records the electrical activity through the heart from the
Right arm to left arm
Right leg to left leg
Right arm to left leg
Left arm to left leg
73
Which of the following could occur if the electrodes are too loose on the patient?
somatic tremor
wandering baseline
AC interference
electrical interference
74
whats the purpose of setting the EKG paper to 50mm/sec
increase the size of the QRS
decrease the size of cpmplexes on the paper
help record slow heart beats
help record rapid heart beats
75
How can the heart rate be calculated?
Multiply the number of QRS complexes in a 15 second strip by 15
Count the number of P waves on a 15 sec strip
Multiply the number of QRS complexes in a 6 second strip by 10
Count the number of ST segments on a 30 sec strip
76
The leads aVR, aVL, aVF are
augmented leads
limb leads
bipolar leads
standard leads
77
Which of following is included in the ECG technicians scope of practice?
explaining the results to the patient
correcting dysrhythmias on ECGs
diagnosing dysrhythmias on ECG
identifying special patient considerations
78
The measurement of the smallest blocks on the EKG paper are
5 mm wide by 2 mm high
1 mm wide by 5 mm wide
1 mm wide by 1 mm high
2 cm wide by 2 cm high
79
Which of the following measures the patients response to a constant or increasing workload
resting EKG
holter monitor
echocardiogram
stress test
80
When performing an ECG on a child, the ECG technician should place
V2 on the right side of the chest next to V1.
V3 on the right side of the chest.
V6 posterior wall of the chest.
V4 two inches lower than on an adult.

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