High blood pressure is not a risk for coronary artery disease. When I'm stressed or angry, my blood pressure can go up. In many cases, high blood pressure can be prevented with proper diet and exercise. After a vigorous workout, I should stop and rest. The heart is a muscle.
Blood pressure is the measure of force needed to push blood through the arteries.
The narrower the arteries, the more force needed to push the blood through, therefore the higher the resistance or blood pressure. The medication alters certain factors in the body to allow the pressure to stay low. Without aid of medication, the pre-existing conditions of the body will make the pressure high again. Sodium, which is found in salt, causes the body to retain water, which increases the blood volume. This requires greater effort to push blood through the arteries.