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Monday, October 1, 2012

Cardiovascular system MCQs ( True / False )

Cardiovascular system MCQs ( True / False )

01) Heart rate,
a) Decreases during inspiration.
b) Is about 60/min in complete heart block.
c) Increases in hypovoleamic shock.
d) Is higher at rest after cardiac transplantation.
e) Increases in obstructive jaundice.

02) Patient with congestive cardiomyopathy presents with swelling of both feet. He is detected to have anejection fraction of 30%.
a) Ejection fraction depends on end diastolic volume.
b) Ejection fraction is normal in this patient.
c) Ejection fraction is assessed by echocardiogram.
d) The oedema is due to left ventricular failure.
e) He is likely to have systolic dysfunction.

03) Systolic blood pressure,
a) Is mainly determined by total peripheral resistance.
b) Blood pressure of 180mmHg is normal in 25 year old normal individual.
c) Is expressed as mmHg in SI units.
d) Contribute to the afterload of the heart.
e) Increase with exercise.

04) Regarding coronary circulation,
a) Coronary musculature has a good anastamosissuppl in a man without ischemic heart disease.
b) 70 - 80% O2 is extracted at rest.
c) Left ventricular blood flow is more during systole than diastole.
d) Sub epicardial region is more affected by ischemia than sub endocardial region.
e) Left coronary artery occlusion causes ST elevation in Lead 1

05) Regarding cardiovascular regulation,
a) Auto regulation in the cerebral blood flow is done by baro receptor reflex.
b) Accumulation of CO2 increases cerebral blood flow.
c) Systemic blood pressure increase as a result of Cushing reflex.
d) Acute control of blood flow is mainly achieved through vasodilator substances.
e) Increase in K+ ion cause vasodilatation.

Click here for cardiac cycle MCQs

06) True of false regarding JVP tracing given below.
a) ‘ B ‘ is due to bulging of tricuspid valve.
d) ‘ A ‘ disappears in atrial fibrillation.
c) ‘ A ‘ is prominent in pulmonary hypertension.
d) Giant ‘ B ‘ is seen in comlete heart block.
e) ‘ D ‘ coincides with ventricular filling.

07) What are true or false regarding cardiac output?
a) Amount of blood pump out from the heart per beat.
b) Lower than the cardiac index.
c) Change with stature.
d) Increased with positive inotrophic agents.
e) Decreases with negative chornotrophic agents.

08) A 10 year boy presented in a hospital with a heavy blood loss and hypovolemic shock.Which of the following can be elevated in his blood at this stage?
a) Renin.
b) Anti diuretic hormone.
c) Growth hormone.
d) Aldosterone.
e) Thyroxin.

09) The following cardiac indices are from 60 year old man.
CO = 4200 ml
HR = 70 beats/min
EDV = 150 ml

The following can be concluded using above data,

a) His SV is normal.
b) His left ventricular ESV is 80 ml.
c) His ejection fraction of left ventricle is 40%.
d) He has diastolic dysfunction.
e) His heart doesn’t obey the Starling;s low.

10) Valsalvamaneuver
a) Involves inspiration against a closed glottis.
b) Results in bradycardia in stage five.
c) Is useful in the diagnosis of autonomic neuropathy.
d) Is useful in the treatment of supraventricular tachycardia.
e) Is useful in the treatment of atrial fibrillation.

11) The following is a pressure volume curve of the left ventricle in a normal person.

a) ‘ E ‘ indicates stroke volume.
b) The opening of mitral valve is at point ‘ D ‘
c) Isovolumetric ventricular relaxation occurs between ‘ A ‘ and ‘ C ‘
d) Aortic valve opening at point ‘ A ‘
e) The pressure at point ‘ A ‘ is approximately 50 mmHg

12) Cardiac output ,
a) Is defined as the pump of blood from each ventricle per beat.
b) Varies with the posture.
c) Increase with elevation of afterload.
d) Increase with stimulation of parasympathetic.
e) Decrease in cardiac tamponade.

13) The following are correctly paired,
a) Diastolic murmur – Aortic regurgitation.
b) First heart sound – Opening of the mitral valve.
c) Second heart sound – Splitting during inspiration.
d) Third heart sound – Atrial contraction.
e) Absence of radial pulse – complete heart block.