The state of the heart when it is not pumping blood effectively enough to meet the needs of the body is known as:

Hypertension is not caused by

The deposition of calcium,fat,cholesterol,and fibrous tissues in the lumen of arteries causes:

Give scientific reasons:
$(1)$ Plaque stimulates/causes the formation of a blood clot on the wall of an artery.
$(2)$ Blood pressure and smoking have a direct relation with obesity.

$A$ chemical that prevents blood clotting is most useful in the treatment of

Select the correct option for $Angina$ $pectoris$.