What Do You Know About Electrophysiology? Trivia Quiz

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What Do You Know About Electrophysiology? Trivia Quiz - Quiz


Electrophysiology is the division of physiology that studies the electrical properties of biological cells and tissues. It entails measuring voltage changes or electric current on single ion channel proteins or even the heart. On this quiz, you will be asked various questions related to the heart and how to read it. What do you know about electrophysiology? Take the quiz and find out. Even if you think you can’t answer the more challenging questions, this quiz will give you a change of heart.


Questions and Answers
  • 1. 

    Which is known as the heart's natural pacemaker?

    • A.

      Atrioventricular Node

    • B.

      Bundle of HIS

    • C.

      Sinoatrial Node

    • D.

      Purkunje fibers

    Correct Answer
    C. Sinoatrial Node
    Explanation
    The sinoatrial node (SA node), also known as sinus node, is a group of cells located in the wall of the right atrium of the heart. These cells have the ability to spontaneously produce an electrical impulse, that travels through the heart via the electrical conduction system causing it to contract. In a healthy heart, the SA node continuously produces action potential, setting the rhythm of the heart and so is known as the heart's natural pacemaker.

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  • 2. 

    Deoxygenated blood reaches Right Atrium through?

    • A.

      Inferior Vena Cava

    • B.

      Pulmonary Veins

    • C.

      Aorta

    • D.

      Superior Vena Cava

    • E.

      Coronary Sinus

    Correct Answer(s)
    A. Inferior Vena Cava
    D. Superior Vena Cava
    E. Coronary Sinus
    Explanation
    *##*Coronary Sinus, Inferior & Superior Vena Cava carries deoxygenated blood to the Right Atrium*##*Pulmonary Veins carry oxygenated blood to the Left Atrium. Aorta pumps the blood to all parts of the body

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  • 3. 

    What are the statements related to the SA Node is/are True? i. It is the heart's natural pacemaker ii. Group of cells located in the wall of the right of the heart. iii. The lower back section of the interatrial septum near the opening of the coronary sinus. iv. The main role of a sinoatrial node cell is to initiate action potentials. v. Conducts the normal electrical impulse from the atria to the ventricles.

    • A.

      I, iii, iv, v is True

    • B.

      I, ii, iv is True

    • C.

      All of the Above is True

    • D.

      All of the Above is False

    • E.

      I, ii & iv is True

    Correct Answer
    E. I, ii & iv is True
    Explanation
    The SA Node is the heart's natural pacemaker, located in the wall of the right atrium of the heart. Its main role is to initiate action potentials and conduct the normal electrical impulse from the atria to the ventricles. Therefore, statements i, ii, and iv are true.

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  • 4. 

    QT Interval is the length of time as measured on ECG between ventricular depolarization and re-polarization.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement is true because the QT interval on an ECG represents the time it takes for the ventricles of the heart to depolarize and then repolarize. It is an important measurement in evaluating the electrical activity of the heart and can provide information about the risk of certain cardiac conditions, such as arrhythmias.

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  • 5. 

    P-R Interval 

    • A.

      Represents Atrial Depolarization.

    • B.

      Onset of P Wave to beginning of QRS Complex.

    • C.

      Represents conduction time from beginning of Atrial Excitation to beginning of Ventricular Excitation.

    • D.

      Represents Ventricular Depolarization

    Correct Answer(s)
    B. Onset of P Wave to beginning of QRS Complex.
    C. Represents conduction time from beginning of Atrial Excitation to beginning of Ventricular Excitation.
    Explanation
    The P-R interval represents the conduction time from the beginning of atrial excitation to the beginning of ventricular excitation. It is measured from the onset of the P wave to the beginning of the QRS complex. This interval reflects the time it takes for the electrical signal to travel from the atria to the ventricles, allowing for coordinated contraction and efficient blood pumping.

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  • 6. 

    Systole is the phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill in the blood.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The given statement is false. Systole is actually the phase of the heartbeat when the heart muscle contracts and pumps blood out of the chambers. Diastole, on the other hand, is the phase when the heart muscle relaxes and allows the chambers to fill with blood.

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  • 7. 

    Order the sequence of events in the Cardiac Conduction System:  
    1. Impulse Formation at the SA Node
    2. Delay at the AV node
    3. Depolarization of the Left and Right Atrium
    4. Conduction at The Bundle Branches
    5. The Mechanical Relaxation of the Ventricle, or Diastole
    6. Conduction Through the Purkinje Fibers
    7. The Mechanical Contraction of the Ventricle, or Systole

    • A.

      1, 4, 7, 5, 6, 2, & 3

    • B.

      1, 3, 2, 4, 6, 7 & 5

    • C.

      1, 2, 3, 4, 5, 6, & 7

    • D.

      4, 3, 1, 7, 5, 6, & 2

    Correct Answer
    B. 1, 3, 2, 4, 6, 7 & 5
    Explanation
    The correct order of events in the Cardiac Conduction System is as follows:
    1. Impulse Formation at the SA Node
    2. Delay at the AV node
    3. Depolarization of the Left and Right Atrium
    4. Conduction at The Bundle Branches
    5. Conduction Through the Purkinje Fibers
    6. The Mechanical Contraction of the Ventricle, or Systole
    7. The Mechanical Relaxation of the Ventricle, or Diastole

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  • 8. 

    ECG is 
    1. A graphic surface recording of electrical cardiac events
    2. A recording made of an cardiac electric activity from an electrode placed in the heart

    • A.

      1 is True & 2 is False

    • B.

      1 is False & 2 is True

    • C.

      Both is True

    • D.

      Both is False

    Correct Answer
    A. 1 is True & 2 is False
    Explanation
    ECG stands for electrocardiogram, which is a graphic surface recording of electrical cardiac events. It is not a recording made from an electrode placed in the heart. Therefore, option 1 is true and option 2 is false.

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  • 9. 

    Identify the correct statement (s).

    • A.

      ECG I, II & III are Augmented Voltage Leads

    • B.

      ECG I, II & III are Limb Leads

    • C.

      ECG aVR, aVL & aVF are Limb Leads

    • D.

      ECG V1 - V6 are Chest/Precordial Leads

    • E.

      ECG V1 -V6 are Augmented Voltage Leads

    Correct Answer(s)
    B. ECG I, II & III are Limb Leads
    D. ECG V1 - V6 are Chest/Precordial Leads
    Explanation
    ECG I, II & III are Limb Leads because they are derived from the electrical activity between the limbs. These leads provide information about the electrical activity of the heart in the frontal plane. On the other hand, ECG V1 - V6 are Chest/Precordial Leads. These leads are placed on the chest to provide information about the electrical activity of the heart in the horizontal plane.

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  • 10. 

    The period immediately following the firing of a nerve fiber when it cannot be simulated no matter how great the stimulus is 'Absolute Refractory Period'.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The absolute refractory period refers to the period immediately after the firing of a nerve fiber when it is unable to be stimulated, regardless of the strength of the stimulus. During this time, the nerve fiber is in a state of temporary inactivity and cannot generate another action potential. This is a protective mechanism that ensures proper signaling and prevents excessive firing of the nerve fiber. Therefore, the statement that the period immediately following the firing of a nerve fiber when it cannot be stimulated, regardless of the stimulus strength, is true.

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  • 11. 

    Pick the correct response. Doctors use an Electrophysiology study to: i. See where an Arrythmia is coming from ii. How well certain medicines work to treat your arrythmia iii. To decide if they should treat the problem by performing Cardiac Ablation iv. To decide if a Pacemaker or Implantable Cardioverter Defibrillator CD will help

    • A.

      Ii, iii & iv is Incorrect

    • B.

      All of the Above is Incorrect

    • C.

      None of the Above is Incorrect

    • D.

      I, ii & iv is Inorrect

    Correct Answer
    C. None of the Above is Incorrect
    Explanation
    An Electrophysiology study is used by doctors to determine the source of an arrhythmia, evaluate the effectiveness of certain medications in treating the arrhythmia, and decide if treatment should be done through cardiac ablation or the use of a pacemaker or implantable cardioverter defibrillator. Therefore, "None of the Above is Incorrect" is the correct response as it accurately represents the purposes of an Electrophysiology study.

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  • 12. 

    Identify the Arrhythmia's whose site of origin is Atria

    • A.

      Atrial Fibrillation

    • B.

      Atrial Flutter

    • C.

      Paroxysmal Supraventricular Tachycardia

    • D.

      Wolf Parkinson White Syndrome

    • E.

      Premature Ventricular Contractions

    • F.

      Ventricular Fibrillation

    Correct Answer(s)
    A. Atrial Fibrillation
    B. Atrial Flutter
    C. Paroxysmal Supraventricular Tachycardia
    D. Wolf Parkinson White Syndrome
    Explanation
    Atrial Fibrillation, Atrial Flutter, Paroxysmal Supraventricular Tachycardia, and Wolf Parkinson White Syndrome are arrhythmias that originate in the atria. These conditions involve abnormal electrical activity in the atria, leading to irregular heart rhythms. Premature Ventricular Contractions and Ventricular Fibrillation, on the other hand, originate in the ventricles, not the atria.

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  • 13. 

    Re-entrant Arrhythmia occur when an entire chamber of heart is involved in multiple re-entry circuits and is therefore quivering with chaotic electric impulses.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Re-entrant arrhythmia occurs when there is a re-entry circuit in a specific area of the heart, not necessarily involving the entire chamber. It can cause abnormal electrical impulses and irregular heartbeats, but it does not necessarily result in the entire chamber quivering with chaotic electric impulses. Therefore, the statement is false.

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  • 14. 

    Pick the correct response based on the statements provided below.  
    1. RF Cardiac Ablation is done to ablate the heart tissues which conduct abnormal electrical impulses. 
    2. Ablation Catheter connected to RF Generator is used for delivering RF Energy (a low-voltage, high frequency current) to the heart tissues.
    3. Ablation Catheter delivers Nitrous Oxide to freeze and destroy arrhythmogenic tissues.
     

    • A.

      All of the above is Correct

    • B.

      None of the above is Correct

    • C.

      1 & 3 is Correct, 2 is Incorrect

    • D.

      2 & 3 is Correct, 1 is Incorrect

    Correct Answer
    A. All of the above is Correct
    Explanation
    RF Cardiac Ablation is a procedure used to treat abnormal electrical impulses in the heart by ablating or destroying the affected heart tissues. This is done using an Ablation Catheter connected to an RF Generator, which delivers RF Energy (a low-voltage, high frequency current) to the heart tissues. Additionally, the Ablation Catheter can also deliver Nitrous Oxide to freeze and destroy arrhythmogenic tissues. Therefore, all three statements provided are correct.

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  • 15. 

    How many entries we have in Right Atrium ?

    • A.

      2

    • B.

      3

    • C.

      5

    • D.

      6

    Correct Answer
    B. 3
    Explanation
    The correct answer is 3 because the right atrium of the heart typically has three main openings or entries: the superior vena cava, the inferior vena cava, and the coronary sinus. These openings allow blood to enter the right atrium from different parts of the body, including the upper body, lower body, and the heart's own blood supply.

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  • 16. 

    What is the name of the structure, supports the cusps of Tricuspid and Mitral Valves

    • A.

      Superior & Inferior Venacava

    • B.

      Purkunje Fibers

    • C.

      Papillary Muscles

    • D.

      Coronary Sinus

    Correct Answer
    C. Papillary Muscles
    Explanation
    Papillary muscles are the structures that support the cusps of the Tricuspid and Mitral valves in the heart. These muscles are located in the ventricles and are attached to the valves by chordae tendineae. When the ventricles contract, the papillary muscles also contract, pulling on the chordae tendineae and preventing the valves from prolapsing or inverting into the atria. This ensures that blood flows in the correct direction through the heart, preventing backflow and maintaining efficient circulation.

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  • 17. 

    What are the Atypical AVNRT (Atrioventricular Nodal Reentry Tachycardia) ?

    • A.

      Slow - Fast AVNRT

    • B.

      Slow - Slow AVNRT

    • C.

      Fast - Very Fast AVNRT

    • D.

      Fast - Slow AVNRT

    Correct Answer
    B. Slow - Slow AVNRT
    Explanation
    Slow-slow AVNRT is a type of atrioventricular nodal reentry tachycardia where both the antegrade and retrograde limbs of the reentry circuit have slow conduction properties. This means that the electrical signals in both directions through the atrioventricular node are slow, resulting in a slower heart rate during the tachycardia. This type of AVNRT is less common compared to other types and may require different treatment approaches.

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  • 18. 

    Identify the statement(s) which is/are CORRECT ?

    • A.

      ICD stands for Implantable Cardioverter Defibrillator

    • B.

      ICD is a battery operated device which is permanently implanted into the body

    • C.

      ICD stands for Implantable Cardiovascular Defibrillator

    • D.

      If your ICD has a pacemaker feature when your heartbeat is too slow, it works as a pacemaker and sends tiny electric signals to your heart

    • E.

      When your heartbeat is too fast or chaotic, it gives defibrillation shocks to stop the abnormal rhythm.

    Correct Answer(s)
    A. ICD stands for Implantable Cardioverter Defibrillator
    B. ICD is a battery operated device which is permanently implanted into the body
    D. If your ICD has a pacemaker feature when your heartbeat is too slow, it works as a pacemaker and sends tiny electric signals to your heart
    E. When your heartbeat is too fast or chaotic, it gives defibrillation shocks to stop the abnormal rhythm.
    Explanation
    The correct statements are that ICD stands for Implantable Cardioverter Defibrillator, ICD is a battery operated device which is permanently implanted into the body, If your ICD has a pacemaker feature when your heartbeat is too slow, it works as a pacemaker and sends tiny electric signals to your heart, and When your heartbeat is too fast or chaotic, it gives defibrillation shocks to stop the abnormal rhythm.

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