Question

Choose the correct answer from each of the four options given below:

The pulse wave is mainly caused by the

• A. Systole of atria
• B. Diastole of atria
• C. Systole of the left ventricle
• D. Systole of the right ventricle.

Answer 1

The correct option is C

Systole of the left ventricle

The correct option is C.

Explanation of the correct option:

Systole of the left ventricle:

1. The pulse is felt over the wrist in the superior artery due to the forceful pumping of blood into the arteries during ventricular systole.
2. For each left ventricular contraction or systole, the blood is forced towards arteries to provide systemic circulation of oxygenated blood and then released towards the tissues during diastole.

Explanation of the incorrect options:

Option A

Systole of atria pushes the additional blood into the ventricles.

Option B

Diastole of atria is the relaxation of atria during which the atrial fills with blood from the vena cava.

Option D

Systole of right ventricle pushes deoxygenated blood through pulmonary valve through the pulmonary arteries to the lungs, thus providing pulmonary circulation

Hence, the Pulse wave is mainly caused by the systole of the left ventricle.