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Latest AIIMS CRE ECG Technician Exam Question (Objective Questions), MCQ in English

Subjects : Concerned Subject, General Knowledge, Quantitative Aptitude, Computer Knowledge

Question Bank AIIMS CRE ECG Technician Exam - English
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Concerned Subject

Question 1Single Answer
Which part of the cardiac conduction system is known as the pacemaker of the heart?
  1. AAV Node
  2. BSA Node
  3. CBundle of His
  4. DPurkinje Fibers
Question 2Single Answer
What is the role of the AV node in the cardiac conduction system?
  1. ATo generate electrical impulses
  2. BTo act as a delay point for the impulses
  3. CTo transmit signals directly to the Purkinje fibers
  4. DTo depolarize the atria
Question 3Single Answer
Which structure conducts electrical impulses from the atria to the ventricles?
  1. APurkinje fibers
  2. BSA node
  3. CAV node
  4. DBundle of His
Question 4Single Answer
The right and left bundle branches originate from which structure?
  1. ASA Node
  2. BAV Node
  3. CBundle of His
  4. DPurkinje Fibers
Question 5Single Answer
What is the function of the Purkinje fibers in the cardiac conduction system?
  1. ATo delay impulses
  2. BTo depolarize the atria
  3. CTo rapidly conduct electrical signals to the ventricles
  4. DTo generate impulses in place of the SA node
Question 6Single Answer
Which wave on the ECG represents atrial depolarization?
  1. AP wave
  2. BQRS complex
  3. CT wave
  4. DU wave
Question 7Single Answer
Which part of the conduction system is responsible for the depolarization of the ventricles?
  1. ASA Node
  2. BAV Node
  3. CPurkinje Fibers
  4. DBundle of His
Question 8Single Answer
What is the intrinsic firing rate of the SA node?
  1. A20-40 beats per minute
  2. B40-60 beats per minute
  3. C60-100 beats per minute
  4. D100-120 beats per minute
Question 9Single Answer
If the SA node fails, which structure takes over as the pacemaker?
  1. ABundle of His
  2. BPurkinje Fibers
  3. CAV Node
  4. DLeft Bundle Branch
Question 10Single Answer
What is the intrinsic firing rate of the AV node?
  1. A10-20 beats per minute
  2. B20-40 beats per minute
  3. C40-60 beats per minute
  4. D60-100 beats per minute
Question 11Single Answer
Which part of the conduction system prevents electrical signals from traveling directly from atria to ventricles without a delay?
  1. ASA Node
  2. BAV Node
  3. CPurkinje Fibers
  4. DBundle Branches
Question 12Single Answer
What does the QRS complex on an ECG represent?
  1. AAtrial depolarization
  2. BVentricular depolarization
  3. CVentricular repolarization
  4. DAtrial repolarization
Question 13Single Answer
Which structure ensures that the heart's contractions are coordinated?
  1. APurkinje fibers
  2. BSA Node
  3. CCardiac muscle cells
  4. DCardiac conduction system
Question 14Single Answer
What is the primary role of the Bundle of His?
  1. ATo depolarize the atria
  2. BTo transmit impulses to the bundle branches
  3. CTo generate impulses
  4. DTo act as the pacemaker
Question 15Single Answer
Where is the SA node located?
  1. AIn the right atrium near the superior vena cava
  2. BIn the left atrium near the pulmonary veins
  3. CAt the junction of the atria and ventricles
  4. DWithin the ventricular septum
Question 16Single Answer
What causes the T wave in an ECG?
  1. AAtrial depolarization
  2. BVentricular depolarization
  3. CVentricular repolarization
  4. DAtrial repolarization
Question 17Single Answer
Which structure distributes electrical impulses to the myocardium?
  1. AAV Node
  2. BPurkinje Fibers
  3. CSA Node
  4. DBundle of His
Question 18Single Answer
What happens during the plateau phase of cardiac muscle action potential?
  1. ARapid depolarization occurs
  2. BCalcium ions enter the cells, maintaining depolarization
  3. CRapid repolarization occurs
  4. DThe muscle returns to resting potential
Question 19Single Answer
What is the primary function of the left and right bundle branches?
  1. ATransmit impulses to the Purkinje fibers
  2. BAct as the heart’s pacemaker
  3. CSlow down electrical conduction
  4. DGenerate electrical impulses
Question 20Single Answer
How does the SA node initiate an impulse?
  1. ABy depolarizing spontaneously due to ion exchange
  2. BBy receiving signals from the AV node
  3. CBy responding to signals from the brain
  4. DBy being stimulated by the Purkinje fibers
Question 21Single Answer
What is the function of the cardiac conduction system?
  1. ATo regulate blood pressure
  2. BTo coordinate the contraction and relaxation of heart muscles
  3. CTo increase the heart rate during exercise
  4. DTo maintain oxygen levels in the blood
Question 22Single Answer
What does the PR interval on an ECG indicate?
  1. ATime taken for ventricular depolarization
  2. BTime taken for atrial depolarization
  3. CTime taken for impulses to travel from the atria to the ventricles
  4. DTime taken for ventricular repolarization
Question 23Single Answer
What is the physiological significance of the AV node delay?
  1. AIt ensures ventricles contract before atria
  2. BIt allows atria to fully contract and empty before ventricular contraction
  3. CIt prevents overloading of electrical signals in the ventricles
  4. DIt reduces heart rate during rest
Question 24Single Answer
Which ion is most critical for the depolarization of the SA node?
  1. ASodium
  2. BPotassium
  3. CCalcium
  4. DMagnesium
Question 25Single Answer
What is the heart’s intrinsic backup pacemaker if both the SA and AV nodes fail?
  1. APurkinje fibers
  2. BBundle of His
  3. CVentricular myocytes
  4. DLeft bundle branch
Question 26Single Answer
Which structure generates the fastest electrical impulses in the heart?
  1. AAV Node
  2. BSA Node
  3. CBundle of His
  4. DPurkinje Fibers
Question 27Single Answer
What does a prolonged PR interval on an ECG suggest?
  1. AAtrial fibrillation
  2. BFirst-degree heart block
  3. CBundle branch block
  4. DVentricular hypertrophy
Question 28Single Answer
Which wave on the ECG represents the time when the ventricles are contracting?
  1. AP wave
  2. BQRS complex
  3. CST segment
  4. DT wave
Question 29Single Answer
What is the role of sodium ions in the cardiac conduction system?
  1. AThey initiate the plateau phase
  2. BThey are responsible for rapid depolarization
  3. CThey maintain the resting potential
  4. DThey trigger ventricular repolarization
Question 30Single Answer
Which cardiac conduction component lies in the interventricular septum?
  1. AAV Node
  2. BPurkinje Fibers
  3. CSA Node
  4. DBundle of His
Question 31Single Answer
What would happen if the Purkinje fibers failed to function?
  1. AThe atria would stop contracting
  2. BThe heart would stop pumping blood
  3. CVentricular contraction would be uncoordinated or absent
  4. DThe AV node would stop firing impulses
Question 32Single Answer
Which phase of the cardiac action potential corresponds to ventricular contraction?
  1. APhase 0
  2. BPhase 1
  3. CPhase 2
  4. DPhase 3
Question 33Single Answer
What is the term for an abnormality in the heart's rhythm caused by conduction system issues?
  1. AMyocardial infarction
  2. BArrhythmia
  3. CTachycardia
  4. DAngina
Question 34Single Answer
What ensures unidirectional flow of electrical impulses in the cardiac conduction system?
  1. AAV Node delay
  2. BRefractory period
  3. CPacemaker activity of SA node
  4. DBundle of His
Question 35Single Answer
Which of the following does not directly contribute to the cardiac conduction system?
  1. ASA Node
  2. BPurkinje Fibers
  3. CCardiac valves
  4. DBundle Branches
Question 36Single Answer
Why is the SA node the primary pacemaker of the heart?
  1. AIt is located at the center of the heart
  2. BIt has the highest intrinsic rate of depolarization
  3. CIt is influenced by sympathetic and parasympathetic systems
  4. DIt directly controls ventricular contraction
Question 37Single Answer
What does a complete heart block indicate?
  1. ANo electrical activity in the heart
  2. BElectrical impulses are not transmitted from atria to ventricles
  3. CVentricular contraction occurs without atrial contraction
  4. DRapid firing of the SA node
Question 38Single Answer
What part of the conduction system is also known as the "gatekeeper"?
  1. ASA Node
  2. BAV Node
  3. CPurkinje Fibers
  4. DBundle of His
Question 39Single Answer
What causes the refractory period in cardiac muscle cells?
  1. APotassium outflow
  2. BSodium channel inactivation
  3. CCalcium influx
  4. DATP depletion
Question 40Single Answer
What is the most likely result of a malfunctioning Bundle of His?
  1. AAtrial flutter
  2. BVentricular arrhythmias
  3. CComplete cessation of cardiac output
  4. DAV node failure
Question 41Single Answer
What is the usual duration of a normal PR interval on an ECG?
  1. A0.04–0.08 seconds
  2. B0.08–0.12 seconds
  3. C0.12–0.20 seconds
  4. D0.20–0.30 seconds
Question 42Single Answer
What is the normal range for the QRS duration on an ECG?
  1. ALess than 0.10 seconds
  2. B0.10–0.12 seconds
  3. C0.12–0.15 seconds
  4. DGreater than 0.15 seconds
Question 43Single Answer
How is ventricular fibrillation treated in an emergency?
  1. AAdministering oxygen
  2. BImmediate defibrillation
  3. CSlowing the heart rate
  4. DGiving calcium supplements
Question 44Single Answer
Which ion is primarily responsible for repolarization in cardiac cells?
  1. ASodium
  2. BCalcium
  3. CPotassium
  4. DChloride
Question 45Single Answer
What represents the heart's electrical recovery phase?
  1. AQRS complex
  2. BPR segment
  3. CST segment
  4. DT wave
Question 46Single Answer
Which structure is directly responsible for the rapid transmission of electrical signals in the ventricles?
  1. ASA Node
  2. BAV Node
  3. CPurkinje Fibers
  4. DLeft Bundle Branch
Question 47Single Answer
What does a widened QRS complex on an ECG typically indicate?
  1. ANormal ventricular depolarization
  2. BDelayed conduction through the ventricles
  3. CAtrial fibrillation
  4. DRapid heart rate
Question 48Single Answer
What is the term for a slow heart rate, often caused by issues in the cardiac conduction system?
  1. ATachycardia
  2. BBradycardia
  3. CArrhythmia
  4. DVentricular fibrillation
Question 49Single Answer
Which of the following ensures that atrial contraction occurs before ventricular contraction?
  1. AThe SA Node pacemaker potential
  2. BAV Node delay
  3. CBundle of His activation
  4. DPurkinje Fiber conduction
Question 50Single Answer
What is the function of documentation in the context of ECG interpretation?
  1. ATo record a patient’s heart rate
  2. BTo provide a legal record of the diagnosis and treatment
  3. CTo analyze electrical activity in the heart
  4. DTo facilitate communication between the atria and ventricles
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