test 3/4 Flashcards
1
Q
The Einthoven triangle is formed by the following three limb leads:
A
right arm, left arm, left leg.
2
Q
Which of the following is not a type of lead used in a 12-lead ECG?
A
abdomen
3
Q
Which of the following is not considered a bipolar lead?
A
aVR
4
Q
The V1 lead should be placed at the:
A
fourth intercostal space, right sternal border.
5
Q
For the proper placement of V3, you must have placed which other two leads on the patient’s chest?
A
V2 and V4
6
Q
Unipolar leads include all the lead types except:
A
standard leads
7
Q
To obtain a 12-lead ECG tracing, you must apply how many lead wires and electrodes to the patient?
A
10
8
Q
The V2 lead should be placed at the:
A
fourth intercostal space, left sternal border.
9
Q
The leads that make up a 12-lead ECG consist of:
A
3 standard, 3 augmented, and 6 chest leads.
10
Q
Which of the following is not a basic function of the electrocardiograph?
A
analysis
11
Q
Signal processing, which occurs inside the ECG machine,
A
amplifies the electrical impulse.
12
Q
The most commonly used paper speed on the ECG machine is:
A
25 mm/sec.
13
Q
The gain control is normally set at:
A
10 mm/mV.
14
Q
Often it is difficult to read the ECG tracing if a patient’s heart rate is fast. Where should you set the speed control to be able to interpret the ECG tracing more easily?
A
50 mm/sec
15
Q
The usual setting for the artifact filter is:
A
40 to 150 Hz.
16
Q
Which type of electrode is preferred for use in a hospital or acute care setting?
A
Silver electrodes
17
Q
The ECG graph paper represents time horizontally and voltage vertically. What time and voltage are represented by one large box?
A
0.20 second and 0.5 mV
18
Q
You are performing a 12-lead ECG on a hospital patient using a portable ECG machine on a cart. As you are conducting the ECG, a red line appears at the bottom of the ECG graph paper. What should you do?
A
Continue the ECG, but remember to replace the paper before performing the next ECG.
19
Q
Each little box on the ECG paper horizontally represents:
A
0.04 second.
20
Q
Which of the following is an advantage of using dot matrix paper instead of the standard grid paper?
A
Dot matrix paper produces sharper photocopies than standard grid paper.
21
Q
Which of the following substances can accidentally erase an ECG tracing?
A
plastic
22
Q
When the paper speed is 25 mm/sec, how many boxes are present in a 1-minute recording?
A
300 boxes per minute
23
Q
Computerized interpretation of the ECG tracing:
Multiple Choice
A
must be validated by a physician.
24
Q
A multichannel ECG monitors all 12 leads but usually records how many leads at one time?
A
3 leads
25
Which of the following is a valid reason to change the speed of the ECG tracing?
You cannot clearly identify the waves because they are too close together.
26
If you attempt to record an ECG and no tracing appears, what should you do?
Recheck the lead wires to make sure they are placed correctly.
27
The term bradycardia means:
slow heart rate
28
The term tachycardia means:
fast heart rate
29
How many leads does a multichannel recorder monitor at one time?
12
30
The process of studying a current ECG tracing along with older ECGs taken at intervals to note differences in a patient's condition is:
serial ECG comparison.
31
Which of the following has enhanced a patient's right to control his or her own health information, making it necessary to handle ECG tracings confidentially?
HIPAA
32
The control on the ECG machine that increases or decreases the size of the ECG tracing is the:
gain control.
33
Which of the following conditions can an ECG machine detect if you set up heart rate limits on the machine?
Tachycardia
34
Which type of electrode is most commonly used to perform an ECG?
Disposable
35
When serial ECGs are performed on a patient, which of the following guidelines should be followed to ensure accurate results?
The electrode placement must be the same for each ECG.
36
How long must the ECG tracing be maintained as part of a patient's medical record?
7 years
37
Unwanted marks on an ECG tracing that are not related to the heart's electrical activity are known as:
artifact
38
The ECG waveform is indicative of:
how the heart is functioning electrically.
39
The first thing that is needed to perform an ECG is:
a physician order for the test.
40
You have an order to perform an ECG on a 76-year-old woman. You knock on the door to her hospital room, introduce yourself, and explain that you are going to perform an ECG. You explain the procedure, but the woman refuses to allow you to do the ECG. What should you say to the patient?
"Will you tell me why you don't wish to have an ECG done?"
41
While preparing to perform an ECG on a 15-year-old girl, you pull the curtain around her hospital bed. The patient becomes agitated and asks why you closed the curtain. What should you tell her?
You are providing privacy for the patient.
42
Which rib is located next to the angle of Louis?
Second rib
43
When properly positioning the chest lead electrodes, you should make sure that the electrode is placed on the ________blank of the rib cage.
intercostal space
44
When applying the chest leads, you will place the V6 lead:
in line with V4 on the midaxillary line.
45
Which anatomical landmark starts in the middle of the axilla and runs down the side of the chest?
midaxillary line
46
Which of the following chest leads are placed on the chest using specific anatomical landmarks?
V1, V2, V4, V5, and V6
47
When applying chest leads, you will place the V4 lead:
at the fifth ICS, left midclavicular line.
48
When applying chest leads, you will place the V2 lead:
at the fourth ICS, left sternal border.
49
You should place the limb electrodes before the chest electrodes because:
the ECG will not run at all without the limb leads attached.
50
The patient has a cast on his lower left leg. The limb electrode placement should be:
at equal levels on the thighs.
51
When placing the chest electrodes on a female with large breasts, you must:
lift the breast and place the electrodes in the closest position possible.
52
You are placing the electrodes for an ECG on a patient who weighs 342 pounds, and you cannot find the midclavicular line. What should you do to place lead V4?
Use the clavicle as the landmark.
53
Electrical safety is maintained while performing an ECG by all of the following except:
removing any electrical equipment from the patient's body.
54
Approach the patient from the patient's ________blank if possible when performing an ECG.
left side
55
You are about to record an ECG on a patient who has Parkinson's disease. What measures can you take to prevent somatic tremors from being recorded on the ECG recording?
Have the patient put his or her hands, palms down, under the buttocks.
56
Which of the following problems can cause wandering baseline on the ECG tracing?
Improperly applied electrodes or poor skin preparation
57
Which of the following causes AC interference artifact?
Lead wires crossed and not pointed toward the hands and feet
58
If the ECG was ordered stat, what must be done with the results?
Give the results directly and immediately to the physician.
59
How should you clean the cables and electrode clips on the ECG machine?
Use a soft cloth moistened with disinfectant or packaged wipes.
60
You are preparing to perform a 12-lead ECG on a 7-year-old child. When communicating with this patient, you should:
avoid using technical words.
61
For infants and small children, where may you have to place lead V3 to prevent crowding of the chest electrodes?
On the right side of the chest
62
Placing lead V3 on the right side of the chest is known as:
V3R
63
What is the difference between continuous cardiac monitoring and a routine ECG?
Only three electrodes are used.
64
You are recording an ECG tracing on a female patient who has had a mastectomy. Your responsibilities include:
documenting this information on the ECG tracing.
65
If your patient is in a permanent fetal position with her arms drawn tightly over the chest, where do you position the electrodes?
on the back
66
If you record more than one ECG during a Code Blue emergency, it is important to note which of the following?
Indicate on tracing "repeat ECG-same lead placement"
67
Which landmark is an imaginary line on the chest that runs vertically through the center of the clavicle?
midclavicular line
68
Which lead is typically used during continuous cardiac monitoring to provide the best view of the P wave?
ll
69
You have begun performing an ECG on a patient, and the tracing appears as a flat line. What is the first thing you should do?
Remain calm and check the patient.
70
An ICD-10 code is a(n)
diagnostic code used by the billing department.
71
Which of the following is not commonly performed as part of routine maintenance of an ECG machine?
Sterilizing the cables
72
If a patient has breast implants, what modification may be necessary when you place the chest electrodes?
Place V1 and V2 a little higher on the chest.
73
How should you position a pregnant woman for an ECG?
Rolled slightly to her left side
74
For which of the following patients might a physician order a right-side 12-lead ECG?
A patient with dextrocardia
75
Where should you place V7 when you are performing a posterior 12-lead ECG?
In a straight line from V6 on the left posterior axillary line
76
If a patient has a seizure while you are performing an ECG, you should:
protect the patient from injury.
77
Using proper body mechanics includes:
using movements that maintain your posture.
78
The purpose of practicing proper body mechanics is primarily to:
prevent injuries to yourself or the patient.
79
You need to perform an ECG on a patient who weighs 285 pounds. The patient is brought into the room in a wheelchair and informs you that she cannot move to the ECG table without assistance. You do not have the strength to lift the patient onto the table. What should you do?
Ask a co-worker to assist you in moving the patient
80
You are trying to perform an ECG on an infant, but the infant is scared and is crying hysterically. The parents have tried to calm him, but without success. What is your best course of action?
Multiple Choice
Wait until the infant falls asleep
81
Why are lead II or a modified chest lead the preferred leads for continuous cardiac monitoring?
These leads provide the best ability to view the P wave.
82
As you are preparing to perform an ECG on a 47-year-old patient, the patient has a seizure. The patient is not yet on the ECG table; she is lying on the floor next to the table in the procedure room. Which of the following actions should you take?
Remove any objects in the area that may cause injury
83
Which of the following may be a cause of somatic tremor?
Shivering from being cold.
84
Which of the following techniques is the BEST demonstration of proper body mechanics?
Lift with your legs, not your back
85
Which leads view the inferior wall of the left ventricle?
II, III, and aVF
86
Which leads view the septal wall?
V1 and V2
87
Which leads view the anterior wall of the left ventricle?
V3 and V4
88
Which leads view the lateral wall of the left ventricle?
I, aVL, V5, and V6
89
What is the term for a normal Q wave that measures less than 0.04 second in duration and is less than one-third of the height of the R wave in a lead ?
Physiologic Q wave
90
What is the term for a Q wave that is longer than 0.04 second in duration and is greater than or equal to one-third of the height of the R wave in a lead?
Pathologic Q wave
91
What does a pathologic Q wave indicate?
tissue death
92
fourth intercostal space, right sternal border
V1
93
fourth intercostal space, left sternal border
V2
94
halfway between V2 and V4
V3
95
fifth intercostal space at the midclavicular line
V4
96
At the anterior axillary line on the same horizontal level as V4
V5
97
At the midaxillary line on the same horizontal level as V4
V6
98
Where the main part of the sternum and the manubrium attach to the second pair of ribs is called the:
angle of louis
99
When attempting to place electrodes on the arms, how should you handle a patient whose one arm is hooked to an IV, is in a cast, or has been amputated?
Choose an alternate site (the shoulders) and place both arm electrodes (right and left) on the right and left shoulders.
100
Frequently, for infants or children with very fast heart rates, you will need to adjust the paper speed to ________
50 mm/sec
101
Somatic tremors are caused by:
muscle movement
102
If your patient has an amputated left lower leg, you should place the electrodes as follows:
LL on left lower thigh, RL on right thigh
