The Ultimate ECG Technician Certification Exam Quiz

2.

What is the PR segment?

Ventricular depolarization
Atrial depolarization
Depolarization of AV node and its delay and depolarization of Bundle of His and Bundle branches
Atrial repolarization

Correct Answer

A. Depolarization of AV node and its delay and depolarization of Bundle of His and Bundle branches

Explanation

The PR segment refers to the depolarization of the AV node and its delay, as well as the depolarization of the Bundle of His and Bundle branches. This segment represents the time it takes for the electrical signal to travel from the atria to the ventricles, allowing for coordinated contraction and efficient pumping of blood. It is an important part of the electrical conduction system of the heart.

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3.

What are the small squares horizontally on the EKG paper equal to?

0.1 sec
0.2 sec
0.04 sec
5 sec

Correct Answer

A. 0.04 sec

Explanation

The small squares horizontally on the EKG paper are equal to 0.04 seconds.

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3

4.

What does the QRS complex represent?

Septal depolarization
AV depolarization
The depolarization of ventricles
The depolarization of atria

Correct Answer

A. The depolarization of ventricles

Explanation

The QRS complex represents the depolarization of the ventricles. Depolarization is the electrical activation of the heart muscle cells, causing them to contract. The QRS complex is a waveform on an electrocardiogram (ECG) that represents the spread of electrical activity through the ventricles. It begins with the depolarization of the interventricular septum (septal depolarization) and continues with the depolarization of the ventricular walls. This electrical activity leads to the contraction of the ventricles, which pumps blood out of the heart and into the circulatory system.

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5

5.

What is the correct ratio of breaths to compressions in CPR?

2 breaths to 15 compressions
2 breaths to 30 compressions
1 breath to 30 compressions
1 breath to 15 compressions

Correct Answer

A. 2 breaths to 30 compressions

Explanation

The correct ratio of breaths to compressions in CPR is 2 breaths to 30 compressions. This means that after every 30 compressions, two breaths should be given to the person in need of CPR. This ratio ensures that there is an adequate balance between chest compressions to circulate blood and breaths to provide oxygen to the person's lungs.

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4

6.

The correct lead for the 5th intercostals space, midaxillary line on the left side is:

V1
V3
V4
V6

Correct Answer

A. V6

Explanation

The correct lead for the 5th intercostal space, midaxillary line on the left side is V6. This is because V6 is positioned in the midaxillary line at the same level as the 5th intercostal space. The V leads in the ECG represent specific positions on the chest where the electrical activity of the heart is measured. The V6 lead is commonly used to assess the electrical activity of the left ventricle and is placed in the midaxillary line at the level of the 5th intercostal space.

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7.

What's the amount of blood pumped into the aorta each minute by the heart called?

Stroke volume
Venous volume
Cardiac output
Ejection fraction

Correct Answer

A. Cardiac output

Explanation

Cardiac output refers to the amount of blood that is pumped into the aorta by the heart per minute. It is a measure of the efficiency of the heart in delivering oxygenated blood to the body's tissues. Stroke volume, on the other hand, refers to the amount of blood pumped out of the heart with each contraction. Venous volume is the amount of blood present in the veins, while ejection fraction is the percentage of blood pumped out of the heart with each contraction.

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3

8.

What's the ST segment?

Delay in the atrioventricular node
Ventricular depolarization
The pause between ventricular depolarization and ventricular repolarization
Atrial depolarization

Correct Answer

A. The pause between ventricular depolarization and ventricular repolarization

Explanation

The ST segment is the pause between ventricular depolarization and ventricular repolarization. It represents the time when the ventricles are completely depolarized and preparing for repolarization. During this phase, the ventricles are relaxed and ready to receive the next electrical signal for contraction. Monitoring the ST segment on an electrocardiogram (ECG) can provide important information about the health of the heart, as changes in the ST segment can indicate ischemia or injury to the heart muscle.

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6

9.

Myocardial Infarction occurs when blood flow to the heart muscle stops or is suddenly decreased long enough to cause cell death.

True
False

Correct Answer

A. True

Explanation

The given statement is true. Myocardial Infarction, also known as a heart attack, happens when there is a blockage in the blood flow to the heart muscle. This blockage can occur due to the narrowing or complete blockage of the coronary arteries that supply oxygen-rich blood to the heart. When the blood flow is interrupted or reduced for a prolonged period, it can lead to the death of heart muscle cells, causing a heart attack.

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4

10.

What's the major intracellular ion?

Sodium
Potassium
Magnesium
None of these

Correct Answer

A. Potassium

Explanation

Potassium is the major intracellular ion because it plays a crucial role in maintaining the electrical potential across cell membranes. It is involved in various cellular processes such as nerve impulse transmission, muscle contraction, and maintaining fluid balance. Potassium is found in high concentrations inside cells, while sodium is primarily found outside the cells. This concentration gradient allows for the generation of action potentials and other important cellular functions. Magnesium is also an important intracellular ion, but it is not the major one. Therefore, the correct answer is Potassium.

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3

11.

What's the major extracellular ion?

Sodium
Potassium
Magnesium
Calcium

Correct Answer

A. Sodium

Explanation

Sodium is the major extracellular ion because it is the most abundant positively charged ion outside the cell. It plays a crucial role in maintaining fluid balance, transmitting nerve impulses, and regulating blood pressure. Sodium is actively transported out of cells and is primarily found in the extracellular fluid, while potassium is the major intracellular ion. Magnesium and calcium are also important ions in the body, but they are not as abundant in the extracellular fluid as sodium.

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1

12.

What's the location of the sinoatrial node?

Right atrium
Right ventricle
Inter ventricular septum
Purkinje fiber

Correct Answer

A. Right atrium

Explanation

The sinoatrial node, also known as the pacemaker of the heart, is located in the right atrium. It is responsible for initiating electrical impulses that regulate the heart's rhythm and coordinate its contractions.

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2

13.

Ventricular diastole refers to ventricular:

Contraction
Relaxation
Filling time
Pressure ratio

Correct Answer

A. Filling time

Explanation

Ventricular diastole refers to the phase of the cardiac cycle when the ventricles are relaxed and filling with blood. During this phase, the ventricles are not contracting but rather passively receiving blood from the atria. Filling time, therefore, accurately describes this phase as it represents the duration during which the ventricles are being filled with blood before the next contraction occurs.

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5

14.

Which of these is a major stage of activity in the cardiac cycle?

Inflow
Isovolumic relaxation
Ejection
All of these

Correct Answer

A. All of these

Explanation

All of these options are major stages of activity in the cardiac cycle. Inflow refers to the phase where blood flows into the heart chambers, isovolumic relaxation is the period of relaxation when the heart chambers are not contracting and blood volume remains constant, and ejection is the phase when blood is pumped out of the heart chambers. Therefore, all three options are correct and represent different stages of the cardiac cycle.

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15.

There are ___________ per minute in a normal, healthy heart.

72 cardiac cycles
82 cardiac cycles
81 cardiac cycles
60 cardiac cycles

Correct Answer

A. 72 cardiac cycles

Explanation

A normal, healthy heart typically beats at a rate of 72 cardiac cycles per minute. This is considered the average resting heart rate for adults. Cardiac cycles refer to the complete sequence of events that occur during one heartbeat, including the contraction and relaxation of the heart muscles. Therefore, the correct answer is 72 cardiac cycles.

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The Ultimate ECG Technician Certification Exam Quiz

What do you call the waveforms in the middle of the lines?

Quiz Preview

What is the PR segment?

What are the small squares horizontally on the EKG paper equal to?

What does the QRS complex represent?

What is the correct ratio of breaths to compressions in CPR?

The correct lead for the 5th intercostals space, midaxillary line on the left side is:

What's the amount of blood pumped into the aorta each minute by the heart called?

What's the ST segment?

Myocardial Infarction occurs when blood flow to the heart muscle stops or is suddenly decreased long enough to cause cell death.

What's the major intracellular ion?

What's the major extracellular ion?

What's the location of the sinoatrial node?

Ventricular diastole refers to ventricular:

Which of these is a major stage of activity in the cardiac cycle?

There are ___________ per minute in a normal, healthy heart.