CARDIOVASCULAR SYSTEM MCQ – Exercise 25

The multiple choice questions in this online test paper focuses on CARDIOVASCULAR SYSTEM MCQ. If you are looking for self evaluation of your PG Medical entrance exam preparation then this online CARDIOVASCULAR SYSTEM MCQ Test Paper will help you to evaluate your exam preparation.

Instruction for REPRODUCTIVE BIOLOGY/ REPRODUCTIVE MEDICINE / INFERTILITY MCQs:

1- This online MCQ practice test paper contains 30 questions.
2- Each question in this online practice test paper have four options and only 1 option is correct.
3- You can view the answers of this practice test paper after submitting the practice test paper.
Note: The answers mentioned at the end of practice test are the best suitable option as per our knowledge. Users shall cross-check the answers with their textbooks.

Q 1. escape pacemaker following AV nodal block is usually in

His bundle

bundle branches

purkinje fibers

ventricular myocardium

Q 2. AH interval in the HIS bundle recording represents an indirect method of assessing

AV nodal conduction time

atrial conduction time

sinus node activation time

none of the above

Q 3. the third letter in the pacing code indicates

chamber (s) paced

chamber in which electrical activity is sensed

the response to a sensed electrical signal

programmability and rate modulation

Q 4. the first letter in the pacing code indicates

chamber (s) paced

chamber in which electrical activity is sensed

the response to a sensed electrical signal

programmability and rate modulation

Q 5. which of the following statements about escape pacemaker in distal His purkinje system is false

has a rate of 25-45 beats per minute

wide QRS complex of prolonged duration

is the escape pacemaker following AV nodal block

is unstable

Q 6. normal PA interval in the His bundle recording is

30 ms

40 ms

50 ms

60 ms

Q 7. HV interval in the HIS bundle recording represents conduction time through

AV node

His bundle

his purkinje system

endocardium to epicardium

Q 8. in homogeneties in myocardial conduction and /or recovery leading to reentry is exaggerated by

presence of extra pathways

myocardial ion channel abnormalities

myocardial fibrosis

all of the above

Q 9. how many letters are used for describing pacemakers modes and function

Q 10. abnormal impulse formation due to triggered activity is related to

reentry

extra pathways

myocardial ion channel abnormality

cellular after depolarization

Q 11. Effective refractory period is defined as that portion of action potential during which

no stimulus can evoke another response

stimulus can evoke a local non propagated response

stronger stimulus is required to evoke a response

weaker stimulus can evoke a response

Q 12. class I indication for pacing in SA node dysfunction include all except

documented symptomatic bradycardia

syncope of unexplained origin with major abnormalities of SA node dysfunction

sinus node dysfunction associated long term drug therapy for which typically refersthere ia no alternative

symptomatic chronotropic incompetence

Q 13. late after depolarization in digoxin toxicity may lead to

atrial tachyarrhythmias

junctional tachyarrhythmias

fascicular tachyarrhythmias

all of the above

Q 14. anisotropic conduction means impulse propagation is more rapid

parallel to the fiber orientation than transverse it

transverse to the fiber orientation than parallel it

in a particular fiber type

in a particular fiber length

Q 15. which of the following statements is false

pacing does not provoke automatic rhythms

pacing provokes tachycardia due to triggered activity

abnormal automaticity is responsible for APCs & VPCs

none of the above

Q 16. twiddler syndrome best relates to

failing battery of pacemakers

interference by external stimuli on pacemaker

rotation of the pacemaker pulse generator in its pocket

all of the above

Q 17. normal HV interval in the HIS bundle recording is

10-20 ms

15-35 ms

35-55 ms

60-75 ms

Q 18. after depolarization is due to increase in

intracellular calcium accumulation

altered sodium transport

altered potassium transport

intracellular potassium deficiency

Q 19. the fourth letter in the pacing code indicates

chamber (s) paced

chamber in which electrical activity is sensed

the response to a sensed electrical signal

programmability and rate modulation

Q 20. which of the following conditions do not require electrophysiologic tests for the diagnosis in patients with RCG documentation of

asystole

Sinoatrial block

bradycardia –tachycardia syndrome

all of the above

Q 21. tachyarrhythmias typically refer to

isolated premature complexes

nonsustained forms tachycardia originating from myocardium foci or reentrant circuits

sustained forms of tachycardia originating from myocardial foci or reentrant circuits

all of the above

Q 22. which of the following statements about escape pacemaker in His bundle is false

has a rate of 40-60 beats per minute

is associated with QRS complex of normal duration

is the escape pacemaker following AV nodal block

is unstable

Q 23. the second letter in the pacing code indicates

chamber (s) paced

chamber in which electrical activity is sensed

the response to a sensed electrical signal

programmability and rate modulation

Q 24. which of the following statements is false

first degree AV nodal block is intranodal

Mobitz type 1 second degree AV block is intranodal

none of the above

Q 25. early after depolarization is responsible for

catecholamine sensitive VT

atrial tachyarrhythmias caused by digoxin toxicity

torsades des pointes

all of the above

Q 26. intrinsic discharge rate is highest of which of the following potential cardiac pacemakers

sinus node

specialized fibers of his purkinje system

some specialized atrial fibers

none of the above

Q 27. pacemaker syndrome is associated in those

who do not maintain AV synchrony

who do not have adequate cardiac output

who have chronic illness ( HTN , DM )

all of the above

Q 28. to obtain a recording of left atrial activity the electrode catheter is positioned

across the pulmonary valve

across the tricuspid valve

in the coronary sinus

in the superior vena cava

Q 29. normal AH interval in the His bundle recording is

10-5o ms

60-125 ms

125-180 ms

180-250 ms

Q 30. in tachycardia the ventricle rate should be

> 90 beats /min

> 100 beats /min

> 110 beats /min

>120 beats /min

CARDIOVASCULAR SYSTEM MCQ – Exercise 25

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CARDIOVASCULAR SYSTEM MCQ – Exercise 25

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