Cardiac Cycle Practice Questions

Question 1

Cardiac event at the end of isometric relaxation phase:

Accepted Answer

Atrioventricular valves open

Answer

Corresponds to T wave in ECG

Answer

Atrioventricular valves close

Answer

Corresponds to peak of C wave in JVP

Question 2

Aortic valve closure occurs in which part of cardiac cycle?

Accepted Answer

Beginning of isovolumetric relaxation

Answer

Beginning of isovolumetric contraction

Answer

During rapid ventricular filling

Answer

Beginning of ventricular ejection

Question 3

Identify the diagnosis based on the provided ECG image.

Accepted Answer

PSVT

Answer

VT

Answer

AT

Answer

Ventricular fibrillation

Question 4

All of the following statements about the third heart sound (S3) are true, except:

Accepted Answer

Seen in Constrictive Pericarditis

Answer

Seen in Atrial Septal Defect (ASD)

Answer

Seen in Ventricular Septal Defect (VSD)

Answer

Occurs due to rapid filling of the ventricles during early diastole.

Question 5

If the contractility of the heart is decreased, which of the following is seen ?

Accepted Answer

Decreased stroke volume

Answer

Increased ejection fraction

Answer

Increased stroke work

Answer

Increased cardiac output

Question 6

Pressure-Volume loop of cardiac cycle is shown below. What does point C represent?

Accepted Answer

Aortic valve opens

Answer

Aortic valve closes

Answer

Mitral valve closes

Answer

Mitral valve opens

Question 7

What is the correct sequence of phases that follows isovolumic contraction in the cardiac cycle?

Accepted Answer

Ejection, Isovolumic relaxation

Answer

Rapid filling, Diastasis

Answer

Atrial systole, Isovolumic contraction

Answer

Diastasis, Atrial systole

Question 8

Which of the following is correct about the pressure volume loop of left ventricle?

Accepted Answer

Aortic valve opens at 2

Answer

1 to 2 indicates isovolumetric relaxation

Answer

2 to 3 indicates ventricular diastole

Answer

Pulmonic valve opens at 3

Question 9

The recording of cardiac cycle is drawn below. Which of the following is correct about $X$ and $Y$ shown in the image?

Accepted Answer

$X=$ Pre-ejection period and $Y=$ LV ejection time

Answer

$X=$ Pre-ejection period and $Y=$ Electromechanical systole

Answer

$X=$ LV ejection time and $Y=$ Pre-ejection period

Answer

$X=$ Electromechanical systole and $Y=$ LV ejection time

Question 10

Which of the following is correct about the 'X' marking in Arterial Waveform?

Accepted Answer

Closure of aortic valve

Answer

Closure of mitral valve

Answer

Closure of tricuspid valve

Answer

Rapid filling of left ventricle

Cardiac Cycle — MCQs

Cardiac Cycle — MCQs

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