1. Disorders of the Heart 1. Arteriosclerosis: narrowing of the arteries due to the deposit of cholesterol-rich plaques inside the wall of an artery.

2. 2. Atherosclerosis – when cholesterol becomes deposited under the lining of arteries, forming plaque. Video: http://www.youtube.com/watch?v=oZJlZywgQL8

4. Treatments for blocked arteries 1. Aspirin - used to prevent platelets from sticking together. Video: http://www.youtube.com/watch?v=K- KLqiYWeCQhttp://www.youtube.com/watch?v=K- KLqiYWeCQ 2. Clot busting drugs - used to dissolve clots. These drugs can work within three hours and prevent the full onset of a stroke.

5. Angioplasty - a surgical procedure in which a fine plastic tube is inserted into a clogged artery and a balloon is inflated to push the artery open. Video: http://www.youtube.com/watch?v=S 9AqBd4RExk http://www.youtube.com/watch?v=S 9AqBd4RExk

6.  Coronary by pass - involves removing a segment of a healthy blood vessel and using it to create a new pathway around a blocked vessel in the heart. Video: http://www.youtube.com/w atch?v=ymVNmmHc-BQ

7. 3. Hypertension: This is high blood pressure. The heart must work harder to pump blood and it weakens over time.  This may result in a heart attack. Blood vessels in the brain may rupture causing a stroke. Video: http://www.thevisualmd.com/health_centers/cardiovascular_health/hyperten sion/what_is_hypertension_video http://www.thevisualmd.com/health_centers/cardiovascular_health/hyperten sion/what_is_hypertension_video

9. What causes hypertension? Cholesterol can cause arteries to become clogged A diet high in salt can cause the blood to retain more water and increase the volume of blood. Nicotine, caffeine and alcohol can increase heart rate Heredity, age, lack of exercise, smoking and obesity