Blood cancer is the excess production of leucocytes. It is known as:

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.

Wenckebach phenomenon is seen in

Arterial inelasticity or hardening of arteries in human is called . . . . . . .

In which disease does acute chest pain appear when not enough oxygen is reaching the heart muscle?

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