CARDIOVASCULAR SYSTEM MCQ – Exercise 22

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. which of the following enhance Ca2+ loading sufficiently to produce delayed after depolarization

digitalis glycoside toxicity

catecholamines

myocardial ischemia

all of the above

Q 2. which of the following causes phase 3 repolarization

inactivation of the calcium current

persistent activation of Ikr

persistent activation of Iks

all of the above

Q 3. Epsilon waves in ECG are a feature of

WPW syndrome

Long QT syndrome

arrhythmogenic right ventricular dysplasia

Burgada syndrome

Q 4. sodium-calcium exchanger transports how many Na+ for one Ca2+

Q 5. ventricular tachyarrhythmias occur more frequently in patients with

ventricular systolic dysfunction

HCM

sarcoidosis

all of the above

Q 6. which of the following is a response to HUT (head up tilt)

initial increase in heart rate

drop in blood pressure

late reduction in heart rate

all of the above

Q 7. ventricular tachycardia is defined as

≥ 3 consecutive VPCs at a rate >100/min

≥ 3 consecutive VPCs at a rate >150/min

≥ 3 consecutive VPCs at a rate >200/min

≥ 3 consecutive VPCs at a rate >250/min

Q 8. contraindications to exercise stress testing include all except

severe aortic stenosis

acute pancreatitis

rest angina within 48 hours

active infective endocarditis

Q 9. HUT (head up tilt) is a useful tool in the diagnosis and therapy for

recurrent idiopathic vertigo

chronic fatigue syndrome

recurrent transient ischemic attacks

all of the above

Q 10. interpolated VPC is defined as a VPC

that does not produce retrograde concealed conduction or influence the oncoming sinus impulse

that produces retrograde concealed conduction and stops the oncoming sinus impulse

that produces an inverted P wave by retrograde conduction

none of the above

Q 11. cellular feature common to induction of delayed after depolarization is the presence of

increased Ca2+ load in the cytosol

increased Na+ load in the cytosol

increased K+ load in the cytosol

increased Mg2+ load in the cytosol

Q 12. in acute MI prophylactic antiarrhythmic therapy is recommended in

all patients

young patients with complicated infarctions

patients with reinfarction

patients with hypertension

Q 13. first catheter ablation using a DC energy source was performed in the early 1980s by

Scheinman

Hille

Josephson

Zipes

Q 14. which of the following methods is related to autonomic nervous system influence on the heart

late potentials

T wave alternans at low heart rates

QT interval variability

all of the above

Q 15. which of the following relates best with Vaghan –wiilliams class IV class of antiarrhythmic drugs

local anesthetic effect due to blockade of Na+ current

interference of catecholamines action at beta adrenergic receptor

delayed repolarization by K+ current inhibition or activation of depolarizing current

interference with calcium conductance

Q 16. delayed after depolarization occur during

phase 1 of the action potential

phase 2 of the action potential

phase 3 of the action potential

phase 4 of the action potential

Q 17. automaticity is a property o

SA node

his purkinje system

coronary sinus

all of the above

Q 18. supraventricular arrhythmias may be associated with

TGA

Ebsteins anomaly

ASD

VSD

Q 19. which of the following relates best with Vaghan –wiilliams class I class of antiarrhythmic drugs

local anesthetic effect due to blockade of Na+ current

interference of catecholamines action at beta adrenergic receptor

delayed repolarization by K+ current inhibition or activation of depolarizing current

interference with calcium conductance

Q 20. which of the following about connexins is false

Gap junction membrane spanning protein

CMT1X is caused by mutations in connexin 32 gene

mutations in connexin 26 causes progressive hearing loss

none of the above

Q 21. chronically ischemic myocardium exhibits downregulation of

connexins 26

connexins31

connexins32

connexins43

Q 22. which of the following relates best with Vaghan –wiilliams class IIl class of antiarrhythmic drugs

local anesthetic effect due to blockade of Na+ current

interference of catecholamines action at beta adrenergic receptor

delayed repolarization by K+ current inhibition or activation of depolarizing current

interference with calcium conductance

Q 23. HUT (head up tilt) is relatively contraindicated in

severe MS

severe cereberovascular disease

all of the above

Q 24. which of the following determines the resting membrane potential of the myocyte

Ik1

It0

Ikr

Iks

Q 25. what was the impact of antarrhythmic agents on mortality in the CAST (cardiac arrhythmia suppression trial)

significantly decreased

significantly increased

remained unchanged

none of the above

Q 26. which of the following relates best with Vaghan –wiilliams class II class of antiarrhythmic drugs

local anesthetic effect due to blockade of Na+ current

interference of catecholamines action at beta adrenergic receptor

delayed repolarization by K+ current inhibition or activation of depolarizing current

interference with calcium conductance

Q 27. which of the following is principal current during phase 4

Ik1

It0

Ikr

Iks

Q 28. which of the following is false about nodal cells

less negative resting membrane potential

most rapid phase 4 depolarization

slow action potential upstrokes(phase 0 )

action potential mediated by Na + rather than Ca2+

Q 29. which of the following increases mortality rates in patients after myocardial infarction

late potentials

T wave alternans at low heart rates

decrease in heart variability

all of the above

Q 30. early after depolarization occur during

phases 0 and 1 of the action potential

phases 1 and 2 of the action potential

phases2 and 3 of the action potential

phases 3 and 4 of the action potential

CARDIOVASCULAR SYSTEM MCQ – Exercise 22

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CARDIOVASCULAR SYSTEM MCQ – Exercise 22

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