Thursday, September 1, 2016

Correlation between CHD and high-fat diets
Eugene Yang 12E
      Many studies show the relationship between Coronary Heart Disease (CHD) and fat diets. However, it does not refer to every type of fats.

      There are three types of fats, saturated fats, unsaturated fats, and trans fats. Saturated fats are the animal products; they raise total blood cholesterol levels which lead to an increase in the possibility of resulting cardiovascular disease. Trans fat is the hydrogenated oils, which are found in daily bakery products. Consuming trans fats have the same effect as consuming saturated fats; it increases the amount of LDL cholesterol (low-density lipoprotein) and decreases the amount of HDL cholesterol (high-density lipoprotein). LDL cholesterol is bad for the body as it is the consonant of plaque. A diet containing both high saturated and trans fats may raise cholesterol level in blood and can lead to atherosclerosis.

      Coronary heart disease is when a substance called plaque builds up inside the wall of coronary arteries; coronary arteries are the main supply of oxygenated blood to the heart. The plaques are formed by fat, cholesterols, and other substances. This plaque is built in the coronary artery over time, which narrows the artery; gradually limiting the amount of oxygen supply for the heart. The amount of plaque built up has a correlation to the amount fat consumption; since saturated and trans fats raise blood cholesterol levels.


      This diagram shows how plaque effects the blood flow in the coronary artery. Figure B shows the normal coronary artery, which has no plaque at all. Therefore, the blood flow is reasonably fast. However, as figure C is represented, the coronary artery is narrower with the plaque. Clearly, less oxygenated blood would be able to pass through the coronary artery, not able to supply sufficient amount of oxygen to the heart.



      However, not every fat is harmful to the body. In fact, unsaturated fats are beneficial for the body. Unsaturated fats are different to saturated fats as it has fewer H-C bonds. There are three types of unsaturated fats. Both monounsaturated and polyunsaturated fatty acids improve blood cholesterol levels, which decreases the risk of CHD. Trans fats are rich in LDL cholesterol which forms the plaque. On the other hand, Omega-3 fatty acids, another type of unsaturated fats, are rich in HDL cholesterol. HDL cholesterol reduces, recycles, and reuses LDL cholesterol by removing it from the arteries and transporting it to the liver for reprocessing. It also keeps the inner wall of the coronary arteries clean and clear plaques.

3 comments:

  1. WWW: Professionally and also easily leading description of CHD and fat diet
    Capability and potential to increase my own knowledge after reading this.
    EBI: If the professional terms were described and well interpreted the whole piece would have been better. For example) atherosclerosis
    Q: What is atherosclerosis and the likely symptom about it.

    ReplyDelete
  2. WWW: Professionally and also easily leading description of CHD and fat diet
    Capability and potential to increase my own knowledge after reading this.
    EBI: If the professional terms were described and well interpreted the whole piece would have been better. For example) atherosclerosis
    Q: What is atherosclerosis and the likely symptom about it.

    ReplyDelete
  3. Atherosclerosis is a disease where plaque is built up in the coronary arteries. Due to reduced and lack of oxygenated blood flow, a heart attack or stroke can follow as heart muscles cannot operate fully.

    ReplyDelete