Pain in the heart muscle is known as........

Heart attack is also called . . . . . . .

Deposition of fatty substances in the lining of arteries is termed as . . . . . . .

The figure below shows an angioplasty of the coronary blood vessel. Which one of the following statements correctly describes what is being done?

Heaviness with severe chest pain which may disappear with rest indicates:

Given below are the abnormal conditions related to blood circulation. Name the disorders.
$(a)$ Acute chest pain due to failure of $O_{2}$ supply to heart muscles
$(b)$ Increased systolic pressure