EKG Tech Leads Only
Chapter 2 (Based on textbook ECG Interpretation Made Incredibly Easy, 4th Edition). This is a test over just the leads as discussed in chapter 2.
Questions and Answers
- 1.
Which type of ECG provides continuous cardiac monitoring?
- A.
12-Lead
- B.
Single-lead
- C.
Dual-lead
- D.
Both single and dual lead
Correct Answer
D. Both single and dual leadExplanation
Both single and dual lead ECGs provide continuous cardiac monitoring. Single-lead ECGs use only one electrode to measure the electrical activity of the heart, while dual-lead ECGs use two electrodes. Continuous monitoring is important for detecting any changes or abnormalities in the heart's electrical signals over a period of time. By continuously monitoring the heart, healthcare professionals can quickly identify any potential cardiac issues and provide appropriate medical intervention.Rate this question:
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- 2.
Six limb leads provide information about the heart's ___________ plane.
Correct Answer
frontal
verticalExplanation
Six limb leads provide information about the heart's frontal and vertical planes. The frontal plane refers to the direction of electrical activity in the heart from the front to the back, while the vertical plane refers to the direction of electrical activity from the top to the bottom of the heart. These leads are used in electrocardiography to obtain a comprehensive understanding of the heart's electrical activity and diagnose any abnormalities.Rate this question:
- 3.
Bipolar leads require which type of electrode(s) for monitoring?
- A.
Positive
- B.
Negative
- C.
Both
Correct Answer
C. BothExplanation
Bipolar leads require both positive and negative electrodes for monitoring. This is because bipolar leads measure the electrical activity between two specific points on the body. The positive electrode is placed on one point, while the negative electrode is placed on another point. By measuring the electrical difference between these two points, bipolar leads can provide valuable information about the electrical activity of the heart or other body parts.Rate this question:
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- 4.
Unipolar leads record information from one lead and require only one electrode.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Unipolar leads are a type of electrocardiogram (ECG) leads that record electrical activity from one specific lead and require only one electrode. Unlike bipolar leads, which record information from two leads and require two electrodes, unipolar leads provide a single perspective of the heart's electrical activity. Therefore, the statement that unipolar leads record information from one lead and require only one electrode is true.Rate this question:
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- 5.
The six precordial leads (V1 - V6) provide information about which plane?
- A.
Vertical
- B.
Frontal
- C.
Anterior
- D.
Horizontal
Correct Answer
D. HorizontalExplanation
The six precordial leads (V1 - V6) provide information about the horizontal plane. These leads are placed on the chest to record the electrical activity of the heart in this specific plane. By analyzing the waveforms and patterns obtained from these leads, healthcare professionals can assess the heart's function and detect any abnormalities or irregularities. Therefore, the precordial leads are essential for diagnosing and monitoring heart conditions in the horizontal plane.Rate this question:
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- 6.
A transverse cut through the middle of the heart, provides a superior or inferior view.
- A.
Horizontal
- B.
Frontal
- C.
Neither
Correct Answer
A. HorizontalExplanation
A transverse cut through the middle of the heart provides a horizontal view. This means that the cut is made parallel to the ground, dividing the heart into superior (upper) and inferior (lower) portions. A horizontal view allows for a better understanding of the structures and relationships within the heart, as it provides a clear view of the chambers, valves, and blood vessels in a side-by-side arrangement.Rate this question:
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- 7.
A _______ refers to a cross-section view of the electrical activity of the heart.
Correct Answer
planeExplanation
A plane refers to a cross-section view of the electrical activity of the heart. In this context, a plane is a two-dimensional representation that allows us to visualize and understand the electrical patterns and abnormalities within the heart. By examining the electrical activity from different angles and perspectives, healthcare professionals can gain valuable insights into the functioning of the heart and diagnose any potential issues or conditions. This helps in the effective treatment and management of cardiovascular diseases.Rate this question:
- 8.
A _______ plane refers to a vertical cut through the middle of the heart. Provides an anterior-posterior view.
Correct Answer
FrontalExplanation
A frontal plane refers to a vertical cut through the middle of the heart that provides an anterior-posterior view. This means that the plane divides the heart into front and back halves, allowing us to see the heart from the front and back simultaneously.Rate this question:
- 9.
A lead provides a view of the heart's electrical activity between a positive and a negative pole.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
A lead is a device that measures the electrical activity of the heart. It consists of two electrodes, a positive and a negative pole, which are placed on the body to capture the electrical signals. These signals represent the heart's electrical activity and can help diagnose various cardiac conditions. Therefore, it is true that a lead provides a view of the heart's electrical activity between a positive and a negative pole.Rate this question:
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- 10.
When electrical current travels toward the negative pole, the waveform deflects mostly ______
- A.
Upward
- B.
Downward
- C.
Depends on electrode placement
Correct Answer
B. DownwardExplanation
When electrical current travels toward the negative pole, the waveform deflects mostly downward. This is because the negative pole attracts the positively charged particles in the electrical current, causing them to move in the opposite direction. As a result, the waveform is deflected downward.Rate this question:
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- 11.
When the current flows toward the _________ pole, the waveform deflects mostly upward.
Correct Answer
positiveExplanation
When the current flows toward the positive pole, the waveform deflects mostly upward. This is because the positive pole has a higher potential compared to the negative pole. As a result, the electrons in the circuit flow from the negative pole towards the positive pole. This flow of electrons creates a magnetic field that causes the waveform to deflect upward.Rate this question:
- 12.
Leads I, II and III typically produce ________ deflection on ECG tracings.
- A.
Positive
- B.
Negative
- C.
Lead I and II are positive and lead III is negative.
- D.
Depends on lead placement.
Correct Answer
A. PositiveExplanation
Leads I, II, and III typically produce positive deflection on ECG tracings. This is because the positive electrode is placed on the left arm for lead I, on the right arm for lead II, and on the left leg for lead III. The electrical activity moving towards these positive electrodes will result in a positive deflection on the ECG tracing.Rate this question:
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- 13.
The five-electrode system uses an exploratory chest lead to monitor modified chest or standard limb leads.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The five-electrode system is a method used to monitor the heart's electrical activity. It involves placing electrodes on the chest and limbs to record the signals. In this system, an exploratory chest lead is used to monitor modified chest or standard limb leads. This means that the exploratory chest lead helps in monitoring the signals from the modified chest or standard limb leads. Therefore, the statement is true.Rate this question:
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- 14.
The ____ electrode system uses one positive electrode, one negative electrode and a ground.
Correct Answer
three
3Explanation
The question is asking for the type of electrode system that uses one positive electrode, one negative electrode, and a ground. The correct answer is "three" or "3" because it indicates that there are three electrodes in this system.Rate this question:
- 15.
When using a five-leadwire system, where would you place the green lead?
- A.
LL
- B.
RA
- C.
C
- D.
RL
Correct Answer
D. RLExplanation
In a five-leadwire system, the green lead is typically placed on the RL (Right Leg) electrode. This electrode is used to provide a reference point for the electrical activity of the heart. The RL electrode is usually located on the right leg or foot, and it helps to reduce noise and interference in the ECG signal. Placing the green lead on RL ensures accurate and reliable measurements of the heart's electrical activity.Rate this question:
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- 16.
In a telemetry monitoring system, you can create the same leads as the other systems with just two electrodes and a ground wire.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because in a telemetry monitoring system, it is possible to create the same leads as other systems using just two electrodes and a ground wire. Telemetry monitoring systems are designed to transmit data wirelessly, and by properly placing the electrodes on the body, it is possible to capture and transmit the necessary signals for monitoring without the need for additional leads or wires. This makes the system more convenient and less cumbersome for the user.Rate this question:
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- 17.
Current flows from:
- A.
Positive to negative
- B.
Negative to positive
- C.
Depends on electrode placement.
Correct Answer
B. Negative to positiveExplanation
Current flows from negative to positive because conventional current flow is defined as the flow of positive charges. In reality, electrons are negatively charged particles that move in the opposite direction of conventional current. Therefore, electrons flow from the negative terminal of a power source to the positive terminal, creating the flow of current.Rate this question:
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- 18.
Which lead provides a view of the heart that shows current moving from right to left?
- A.
I
- B.
II
- C.
III
- D.
None of these
Correct Answer
A. IExplanation
Lead I provides a view of the heart that shows current moving from right to left.Rate this question:
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- 19.
The negative electrode for lead I is placed which arm or side of the chest?
Correct Answer
Right
the right
RAExplanation
The negative electrode for lead I is placed on the right side of the chest. This is indicated by the abbreviation "RA," which stands for right arm. Placing the electrode on the right side allows for proper positioning and accurate measurement of electrical activity in the heart.Rate this question:
- 20.
Where is the positive electrode for lead II placed?
- A.
LA
- B.
LL
- C.
RA
Correct Answer
B. LLExplanation
The positive electrode for lead II is placed on the left leg (LL). This is because in a standard 12-lead ECG, the positive electrode for lead II is placed on the right arm (RA) and the negative electrode is placed on the left leg (LL). The LL lead measures the electrical activity between the right arm and left leg, providing important information about the electrical conduction of the heart.Rate this question:
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- 21.
The current for this lead travels down from the RA to the LL
- A.
I
- B.
II
- C.
III
Correct Answer
B. II -
- 22.
When continuous monitoring, the positive electrode for lead II can be placed:
- A.
Before the palpable ribs at the right midclavicular line.
- B.
Below the lowest palpable rib at the right midclavicular line.
- C.
Below the lowest palpable rib at the left midclavicular line.
Correct Answer
C. Below the lowest palpable rib at the left midclavicular line. -
- 23.
The positive electrode for lead III is placed on the:
Correct Answer
left leg
LLExplanation
The positive electrode for lead III is placed on the left leg (LL) because lead III is a bipolar lead that measures the electrical activity between the left arm (LA) and the left leg (LL). The positive electrode is placed on the left leg to capture the electrical signal from that specific lead.Rate this question:
- 24.
Where is the negative electrode for lead III placed?
- A.
LL
- B.
RA
- C.
LA
Correct Answer
C. LAExplanation
The negative electrode for lead III is placed on the left arm (LA).Rate this question:
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- 25.
Which leads would be used for detecting changes associated with an inferior wall myocardial infarction?
- A.
I & II
- B.
II & III
- C.
I & III
- D.
The augmented leads
Correct Answer
B. II & IIIExplanation
Leads II and III would be used for detecting changes associated with an inferior wall myocardial infarction. These leads are specifically positioned to provide a view of the inferior wall of the heart, which is the area most commonly affected during an inferior wall myocardial infarction. By monitoring the electrical activity in these leads, healthcare professionals can identify any abnormal changes that may indicate an infarction in this region.Rate this question:
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- 26.
Einthoven's triangle provides a view of which plane?
- A.
Frontal
- B.
Horizontal
- C.
Posterior
- D.
Internal
Correct Answer
A. FrontalExplanation
Einthoven's triangle provides a view of the frontal plane. This is because the triangle is formed by the three limb leads in an electrocardiogram (ECG), which are placed on the limbs of the body. These leads record the electrical activity of the heart in the frontal plane, which is a vertical plane that divides the body into front and back halves. By looking at the ECG waveform from these leads, healthcare professionals can analyze the electrical activity of the heart and diagnose various cardiac conditions.Rate this question:
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- 27.
The "R", "L", and "F" in the augmented leads stands for the negative electrode position of the lead.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The initials stand for the POSITIVE electrode positions.Rate this question:
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- 28.
The positive electrode for lead aVr is placed on the:
- A.
RA
- B.
LA
- C.
LL
Correct Answer
A. RAExplanation
The positive electrode for lead aVR is placed on the RA (right arm). This is because lead aVR is an augmented unipolar limb lead that measures electrical activity between the right arm and a central terminal. Placing the positive electrode on the RA allows for the accurate measurement of electrical signals in this lead.Rate this question:
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- 29.
In lead aVr, the positive electrode creates a _________ deflection because the heart's electrical activity moves away from the lead.
- A.
Positive
- B.
Negative
- C.
Neutral
Correct Answer
B. NegativeExplanation
In lead aVr, the positive electrode is placed on the right arm, while the negative electrode is placed on the left leg. The heart's electrical activity moves away from the positive electrode and towards the negative electrode, resulting in a negative deflection on the lead aVr.Rate this question:
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- 30.
In lead aVl, the positive electrode produces a ____ deflection.
- A.
Positive
- B.
Negative
- C.
Neutral
Correct Answer(s)
A. Positive
B. Negative
C. NeutralExplanation
In lead aVl, the positive electrode produces a positive deflection. This is because lead aVl is a unipolar lead, meaning it only measures the potential difference between the positive electrode and a reference point. In this case, the positive electrode is placed on the left arm, and when there is a higher potential at this electrode compared to the reference point, it produces a positive deflection on the ECG tracing. If the potential is lower at the positive electrode, it would produce a negative deflection, and if the potential is the same, it would produce a neutral deflection.Rate this question:
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- 31.
In lead aVf, the positive electrode produces a ________ deflection.
- A.
Positive
- B.
Negative
- C.
Neutral
Correct Answer
A. PositiveExplanation
In lead aVf, the positive electrode produces a positive deflection. This means that the electrical activity being recorded at this electrode is moving in a positive direction.Rate this question:
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- 32.
This lead shows the P wave, QRS complex and ST segment very well.
- A.
V1
- B.
V3
- C.
V2
Correct Answer(s)
A. V1
B. V3
C. V2Explanation
The correct answer is V1, V3, V2. This is because these leads provide a good visualization of the P wave, QRS complex, and ST segment. Lead V1 is positioned on the right side of the sternum and is helpful in assessing the right ventricle. Lead V3 is placed between V2 and V4 and provides a good view of the anterior wall of the left ventricle. Lead V2 is positioned on the right side of the sternum, slightly below V1, and is useful in assessing the septum and anterior wall of the left ventricle.Rate this question:
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- 33.
Which lead(s) can be used to detect ST-segment elevation?
- A.
V1
- B.
V2
- C.
V3
- D.
V4
- E.
V1 & V2
- F.
V2 & V3
Correct Answer
F. V2 & V3Explanation
V2 and V3 leads can be used to detect ST-segment elevation. These leads are part of the standard 12-lead electrocardiogram (ECG) and are specifically positioned on the chest to capture electrical activity in the heart. ST-segment elevation is an important indicator of myocardial infarction (heart attack) and can be seen as an upward shift in the ST segment on the ECG. By analyzing the ST segments in V2 and V3 leads, healthcare professionals can identify potential heart attacks and initiate appropriate interventions.Rate this question:
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- 34.
Which lead(s) can show changes in the ST segment or T wave?
- A.
V4 & V5
- B.
V4
- C.
V5
- D.
V3 & V4
Correct Answer
A. V4 & V5Explanation
The ST segment and T wave changes can be observed in leads V4 and V5. These changes can be indicative of various cardiac conditions such as myocardial ischemia, injury, or infarction. Monitoring these leads can provide valuable information about the electrical activity of the heart and help in diagnosing and managing cardiac abnormalities.Rate this question:
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- 35.
Which lead would you most likely use to confirm pacemaker wire placement?
- A.
MCL1
- B.
MCL6
- C.
V2 & V3
- D.
V1
Correct Answer
A. MCL1Explanation
MCL1 is the most likely lead to use for confirming pacemaker wire placement. This is because MCL1 is the standard lead for monitoring the placement and function of pacemaker wires. It provides a clear view of the electrical activity in the heart and allows for accurate assessment of the pacemaker's effectiveness. MCL6, V2 & V3, and V1 are not typically used for this purpose, making MCL1 the correct choice.Rate this question:
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