Which of the following is (are) unipolar leads? aVL Lead II V6 Lead III aVR 3 only 1 and 5 only 2 and 4 only 1,3, and 5 only

Question

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Answer 1

Textbook Question

Chapter 13, Problem 1RQ

Which of the following is (are) unipolar leads?

aVL

Lead II

V6

Lead III

aVR

3 only

1 and 5 only

2 and 4 only

1,3, and 5 only

Expert Solution & Answer

Summary Introduction

Introduction:

The electrocardiogram (ECG) is the representation of the electrical activity of the heart in the form of a graph, which is of clinical significance. ECG uses unipolar and bipolar leads, of which the unipolar leads are the single conductor leads with an electrode at one tip while the bipolar leads have two separate and isolated conductors. Unipolar leads monitor the activities of the heart between the positive electrodes and the zero electrical reference point, at the center of the heart but the heart also functions as the negative electrode and the bipolar leads monitor its function.

Answer to Problem 1RQ

Correct answer:

aVL, V6 and aVR only.

Explanation of Solution

Justification/ Explanation for the correct answer:

Option (d) is 1, 3, and 5. These are aVL, aVR, and V6. The aVR lead is the unipolar lead that faces the right superior surface. The aVR lead is generally ignored because it does not contribute significant information to the 12-ECG interpretation. The AV here stands for augmented vector and ‘R’ refers to the right arm and ‘L’ refers to the left arm. The aVL is the lead of the left arm and its contribution is higher, in the ECG. The V6 is the precordial lead, which monitors the horizontal activities of the heart. It views the left ventricle and is also known as a lateral lead. Hence, option (d) is correct.

The explanation for the incorrect answers:

Option (a) is 3 only. The V6 is a unipolar chest leads but the aVL and aVR are also unipolar leads. The V6 is a lateral lead. So, it is an incorrect option.

Option (b) is 1 and 5 only. The V6 is also a unipolar lead, which is placed in the chest region to monitor the horizontal activities of heart in an electrocardiogram. So, it is an incorrect option.

Option (c) is 2 and 4 only. The lead II and lead III are the bipolar leads. This means they are derived from electrodes attached to arms and legs. These use a negative and a positive electrode to monitor the heart activities. So, it is an incorrect option.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

The aVL, aVR, and V6 are unipolar leads. The V6 is placed in the chest region and it monitors the horizontal activities of the heart. It is a precordial lead.

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Answer 2

Textbook Question

Chapter 13, Problem 1RQ

Which of the following is (are) unipolar leads?

aVL

Lead II

V6

Lead III

aVR

3 only

1 and 5 only

2 and 4 only

1,3, and 5 only

Expert Solution & Answer

Summary Introduction

Introduction:

The electrocardiogram (ECG) is the representation of the electrical activity of the heart in the form of a graph, which is of clinical significance. ECG uses unipolar and bipolar leads, of which the unipolar leads are the single conductor leads with an electrode at one tip while the bipolar leads have two separate and isolated conductors. Unipolar leads monitor the activities of the heart between the positive electrodes and the zero electrical reference point, at the center of the heart but the heart also functions as the negative electrode and the bipolar leads monitor its function.

Answer to Problem 1RQ

Correct answer:

aVL, V6 and aVR only.

Explanation of Solution

Justification/ Explanation for the correct answer:

Option (d) is 1, 3, and 5. These are aVL, aVR, and V6. The aVR lead is the unipolar lead that faces the right superior surface. The aVR lead is generally ignored because it does not contribute significant information to the 12-ECG interpretation. The AV here stands for augmented vector and ‘R’ refers to the right arm and ‘L’ refers to the left arm. The aVL is the lead of the left arm and its contribution is higher, in the ECG. The V6 is the precordial lead, which monitors the horizontal activities of the heart. It views the left ventricle and is also known as a lateral lead. Hence, option (d) is correct.

The explanation for the incorrect answers:

Option (a) is 3 only. The V6 is a unipolar chest leads but the aVL and aVR are also unipolar leads. The V6 is a lateral lead. So, it is an incorrect option.

Option (b) is 1 and 5 only. The V6 is also a unipolar lead, which is placed in the chest region to monitor the horizontal activities of heart in an electrocardiogram. So, it is an incorrect option.

Option (c) is 2 and 4 only. The lead II and lead III are the bipolar leads. This means they are derived from electrodes attached to arms and legs. These use a negative and a positive electrode to monitor the heart activities. So, it is an incorrect option.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

The aVL, aVR, and V6 are unipolar leads. The V6 is placed in the chest region and it monitors the horizontal activities of the heart. It is a precordial lead.

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Answer 3

Textbook Question

Chapter 13, Problem 1RQ

Which of the following is (are) unipolar leads?

aVL

Lead II

V6

Lead III

aVR

3 only

1 and 5 only

2 and 4 only

1,3, and 5 only

Expert Solution & Answer

Summary Introduction

Introduction:

The electrocardiogram (ECG) is the representation of the electrical activity of the heart in the form of a graph, which is of clinical significance. ECG uses unipolar and bipolar leads, of which the unipolar leads are the single conductor leads with an electrode at one tip while the bipolar leads have two separate and isolated conductors. Unipolar leads monitor the activities of the heart between the positive electrodes and the zero electrical reference point, at the center of the heart but the heart also functions as the negative electrode and the bipolar leads monitor its function.

Answer to Problem 1RQ

Correct answer:

aVL, V6 and aVR only.

Explanation of Solution

Justification/ Explanation for the correct answer:

Option (d) is 1, 3, and 5. These are aVL, aVR, and V6. The aVR lead is the unipolar lead that faces the right superior surface. The aVR lead is generally ignored because it does not contribute significant information to the 12-ECG interpretation. The AV here stands for augmented vector and ‘R’ refers to the right arm and ‘L’ refers to the left arm. The aVL is the lead of the left arm and its contribution is higher, in the ECG. The V6 is the precordial lead, which monitors the horizontal activities of the heart. It views the left ventricle and is also known as a lateral lead. Hence, option (d) is correct.

The explanation for the incorrect answers:

Option (a) is 3 only. The V6 is a unipolar chest leads but the aVL and aVR are also unipolar leads. The V6 is a lateral lead. So, it is an incorrect option.

Option (b) is 1 and 5 only. The V6 is also a unipolar lead, which is placed in the chest region to monitor the horizontal activities of heart in an electrocardiogram. So, it is an incorrect option.

Option (c) is 2 and 4 only. The lead II and lead III are the bipolar leads. This means they are derived from electrodes attached to arms and legs. These use a negative and a positive electrode to monitor the heart activities. So, it is an incorrect option.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

The aVL, aVR, and V6 are unipolar leads. The V6 is placed in the chest region and it monitors the horizontal activities of the heart. It is a precordial lead.

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Answer 4

Textbook Question

Chapter 13, Problem 1RQ

Which of the following is (are) unipolar leads?

aVL

Lead II

V6

Lead III

aVR

3 only

1 and 5 only

2 and 4 only

1,3, and 5 only

Expert Solution & Answer

Summary Introduction

Introduction:

The electrocardiogram (ECG) is the representation of the electrical activity of the heart in the form of a graph, which is of clinical significance. ECG uses unipolar and bipolar leads, of which the unipolar leads are the single conductor leads with an electrode at one tip while the bipolar leads have two separate and isolated conductors. Unipolar leads monitor the activities of the heart between the positive electrodes and the zero electrical reference point, at the center of the heart but the heart also functions as the negative electrode and the bipolar leads monitor its function.

Answer to Problem 1RQ

Correct answer:

aVL, V6 and aVR only.

Explanation of Solution

Justification/ Explanation for the correct answer:

Option (d) is 1, 3, and 5. These are aVL, aVR, and V6. The aVR lead is the unipolar lead that faces the right superior surface. The aVR lead is generally ignored because it does not contribute significant information to the 12-ECG interpretation. The AV here stands for augmented vector and ‘R’ refers to the right arm and ‘L’ refers to the left arm. The aVL is the lead of the left arm and its contribution is higher, in the ECG. The V6 is the precordial lead, which monitors the horizontal activities of the heart. It views the left ventricle and is also known as a lateral lead. Hence, option (d) is correct.

The explanation for the incorrect answers:

Option (a) is 3 only. The V6 is a unipolar chest leads but the aVL and aVR are also unipolar leads. The V6 is a lateral lead. So, it is an incorrect option.

Option (b) is 1 and 5 only. The V6 is also a unipolar lead, which is placed in the chest region to monitor the horizontal activities of heart in an electrocardiogram. So, it is an incorrect option.

Option (c) is 2 and 4 only. The lead II and lead III are the bipolar leads. This means they are derived from electrodes attached to arms and legs. These use a negative and a positive electrode to monitor the heart activities. So, it is an incorrect option.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

The aVL, aVR, and V6 are unipolar leads. The V6 is placed in the chest region and it monitors the horizontal activities of the heart. It is a precordial lead.

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Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

Introduction:

The electrocardiogram (ECG) is the representation of the electrical activity of the heart in the form of a graph, which is of clinical significance. ECG uses unipolar and bipolar leads, of which the unipolar leads are the single conductor leads with an electrode at one tip while the bipolar leads have two separate and isolated conductors. Unipolar leads monitor the activities of the heart between the positive electrodes and the zero electrical reference point, at the center of the heart but the heart also functions as the negative electrode and the bipolar leads monitor its function.

Answer to Problem 1RQ

Correct answer:

aVL, V6 and aVR only.

Explanation of Solution

Justification/ Explanation for the correct answer:

Option (d) is 1, 3, and 5. These are aVL, aVR, and V6. The aVR lead is the unipolar lead that faces the right superior surface. The aVR lead is generally ignored because it does not contribute significant information to the 12-ECG interpretation. The AV here stands for augmented vector and ‘R’ refers to the right arm and ‘L’ refers to the left arm. The aVL is the lead of the left arm and its contribution is higher, in the ECG. The V6 is the precordial lead, which monitors the horizontal activities of the heart. It views the left ventricle and is also known as a lateral lead. Hence, option (d) is correct.

The explanation for the incorrect answers:

Option (a) is 3 only. The V6 is a unipolar chest leads but the aVL and aVR are also unipolar leads. The V6 is a lateral lead. So, it is an incorrect option.

Option (b) is 1 and 5 only. The V6 is also a unipolar lead, which is placed in the chest region to monitor the horizontal activities of heart in an electrocardiogram. So, it is an incorrect option.

Option (c) is 2 and 4 only. The lead II and lead III are the bipolar leads. This means they are derived from electrodes attached to arms and legs. These use a negative and a positive electrode to monitor the heart activities. So, it is an incorrect option.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

The aVL, aVR, and V6 are unipolar leads. The V6 is placed in the chest region and it monitors the horizontal activities of the heart. It is a precordial lead.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

The electrocardiogram (ECG) is the representation of the electrical activity of the heart in the form of a graph, which is of clinical significance. ECG uses unipolar and bipolar leads, of which the unipolar leads are the single conductor leads with an electrode at one tip while the bipolar leads have two separate and isolated conductors. Unipolar leads monitor the activities of the heart between the positive electrodes and the zero electrical reference point, at the center of the heart but the heart also functions as the negative electrode and the bipolar leads monitor its function.

Answer to Problem 1RQ

Correct answer:

aVL, V6 and aVR only.

Explanation of Solution

Justification/ Explanation for the correct answer:

Option (d) is 1, 3, and 5. These are aVL, aVR, and V6. The aVR lead is the unipolar lead that faces the right superior surface. The aVR lead is generally ignored because it does not contribute significant information to the 12-ECG interpretation. The AV here stands for augmented vector and ‘R’ refers to the right arm and ‘L’ refers to the left arm. The aVL is the lead of the left arm and its contribution is higher, in the ECG. The V6 is the precordial lead, which monitors the horizontal activities of the heart. It views the left ventricle and is also known as a lateral lead. Hence, option (d) is correct.

The explanation for the incorrect answers:

Option (a) is 3 only. The V6 is a unipolar chest leads but the aVL and aVR are also unipolar leads. The V6 is a lateral lead. So, it is an incorrect option.

Option (b) is 1 and 5 only. The V6 is also a unipolar lead, which is placed in the chest region to monitor the horizontal activities of heart in an electrocardiogram. So, it is an incorrect option.

Option (c) is 2 and 4 only. The lead II and lead III are the bipolar leads. This means they are derived from electrodes attached to arms and legs. These use a negative and a positive electrode to monitor the heart activities. So, it is an incorrect option.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

The aVL, aVR, and V6 are unipolar leads. The V6 is placed in the chest region and it monitors the horizontal activities of the heart. It is a precordial lead.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

The electrocardiogram (ECG) is the representation of the electrical activity of the heart in the form of a graph, which is of clinical significance. ECG uses unipolar and bipolar leads, of which the unipolar leads are the single conductor leads with an electrode at one tip while the bipolar leads have two separate and isolated conductors. Unipolar leads monitor the activities of the heart between the positive electrodes and the zero electrical reference point, at the center of the heart but the heart also functions as the negative electrode and the bipolar leads monitor its function.

Answer 12

Answer to Problem 1RQ

Correct answer:

aVL, V6 and aVR only.

Answer 13

Explanation of Solution

Justification/ Explanation for the correct answer:

Option (d) is 1, 3, and 5. These are aVL, aVR, and V6. The aVR lead is the unipolar lead that faces the right superior surface. The aVR lead is generally ignored because it does not contribute significant information to the 12-ECG interpretation. The AV here stands for augmented vector and ‘R’ refers to the right arm and ‘L’ refers to the left arm. The aVL is the lead of the left arm and its contribution is higher, in the ECG. The V6 is the precordial lead, which monitors the horizontal activities of the heart. It views the left ventricle and is also known as a lateral lead. Hence, option (d) is correct.

The explanation for the incorrect answers:

Option (a) is 3 only. The V6 is a unipolar chest leads but the aVL and aVR are also unipolar leads. The V6 is a lateral lead. So, it is an incorrect option.

Option (b) is 1 and 5 only. The V6 is also a unipolar lead, which is placed in the chest region to monitor the horizontal activities of heart in an electrocardiogram. So, it is an incorrect option.

Option (c) is 2 and 4 only. The lead II and lead III are the bipolar leads. This means they are derived from electrodes attached to arms and legs. These use a negative and a positive electrode to monitor the heart activities. So, it is an incorrect option.

Hence, options (a), (b), and (c) are incorrect.

Answer 14

Conclusion

The aVL, aVR, and V6 are unipolar leads. The V6 is placed in the chest region and it monitors the horizontal activities of the heart. It is a precordial lead.

Answer 15

Ch. 13 - Which of the following is (are) unipolar...Ch. 13 - Prob. 2RQ Ch. 13 - Prob. 3RQ Ch. 13 - 4. Which of the following monitor(s) the left...Ch. 13 - Prob. 5RQ Ch. 13 - Prob. 6RQ Ch. 13 - Prob. 7RQ Ch. 13 - Prob. 8RQ Ch. 13 - The normal duration of the ST segment is A. 0.12...Ch. 13 - Prob. 10RQ

Which of the following is (are) unipolar leads? aVL Lead II V6 Lead III aVR 3 only 1 and 5 only 2 and 4 only 1,3, and 5 only

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Answer to Problem 1RQ

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