Write short note on the following.
(a) Hypertension
(b) Coronary Artery Disease 

Explanation

Hypertension The high blood pressure can harm heart. brain kidneys and eyes High blood pressure is most common disease affecting the heart and blood vessels, Blood pressure is considered normal at 120/80. When it goes beyond 140 mm Hg and 90 mm it is called hypertension or high blood pressure.
Causes of Hypertension (i) Blockage in the coronary heart vessles (ii) Tobacco smoking speeds up heart rate.It constrict blood vessels and raises blood pressure.
(b ) Coronary Artery Disease (CAD) It is caused due to the deposition of fatty substances on the aterial wall causing atherosclerotic plaques.The lumen of artey decreases,thus obstructing the blood flow and sometimes completely blocks the artery resulting into thus ,heart attack.