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D. Cardiovascular
System
D.1 Hyperlipidemia/Atherosclerosis
Content
Areas
- Cholesterol
- Lipoproteins
- Hyperlipidemia
- Metabolic
Syndrome
- Dietary
fatty acids
- Antioxidants
- Vitamin
and methionine influences on homocyst(e)ine levels
- Fiber:
soluble and insoluble
- Complex
carbohydrate
- Alcohol
- Plant
sterols and stanol ester
- Sodium
- National
Cholesterol Education Program and American Heart Association dietary
guidelines
- Prevention
and lifestyle modification
- Physical
activity
- Medical
nutrition therapy
| After
training, the learner will be able to: |
| Knowledge
Objectives: Medical Students |
- Describe
how fatty acids and cholesterol are absorbed in the intestine
and how the body controls cholesterol absorption, including
the role of the ABC protein.
- Outline
the pathways of cholesterol and triglyceride transport between
tissues and identify sites of regulation that influence
VLDL, LDL, and HDL levels.
- Describe
the role of the three major lipoprotein classes in atherogenesis.
- Identify
the effects of saturated, monounsaturated and polyunsaturated
fatty acids on plasma LDL and cholesterol levels.
- Identify
at least three common foods that are high in cholesterol,
saturated, monounsaturated and polyunsaturated fatty acids.
- Compare
and contrast the structure of saturated fatty acids and
trans fatty acids and their differential effects on atherogenesis.
- Identify
at least three common foods high in n-3 fatty acids.
- Evaluate
the utility of lowering homocyst(e)ine levels to prevent
atherosclerosis.
- Outline
homocyst(e)ine metabolism and the roles of folate, B6
and B12.
- List
at least two common foods high in folate, B6,
B12, or methionine.
- Distinguish
between soluble and insoluble fiber.
- Identify
at least three common foods that are high in soluble and
insoluble fiber.
- Describe
the effects of soluble and insoluble fiber on LDL and triglyceride
levels.
- Identify
the effects of soluble and insoluble fiber on the absorption
of bile acids and simple sugars.
- Compare
and contrast the effects of complex carbohydrates and simple
sugars on plasma glucose and triglyceride levels.
- Identify
at least five common foods that are high in complex carbohydrates.
- Describe
the effect of the level of alcohol consumption on VLDL and
HDL in normal and hypertriglyceridemic persons and any subsequent
effect on atherosclerosis.
- Describe
how plant sterols and stanols influence cholesterol absorption
and LDL levels.
- Identify
at least three common foods that are high in dietary sodium,
calcium, and potassium.
- Identify
NCEP ATP-III criteria defining the metabolic syndrome.
- Explain
how weight loss affects LDL and HDL levels, insulin resistance,
abdominal obesity, glucose intolerance, hypertriglyceridemia,
and the risk of diabetes.
- Summarize
the Therapeutic Lifestyle Change (TLC) diet recommendation
of the National Cholesterol Education Program (NCEP). Compare
the TLC Diet with diets advocating extremely low or high
fat intakes and the expected effects on levels of the major
classes of lipoproteins.
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| Knowledge
Objectives: Residents |
- Evaluate
the utility of lowering homocyst(e)ine levels to prevent
atherosclerosis.
- Provide
at least two examples of individual genetic variations affecting
the efficacy of the nutritional management of cardiovascular
disease.
- Describe
the gender-related differences in energy balance, diet-associated
lipoprotein levels, and the incidence of CVD.
- Describe
the controversy surrounding the use of antioxidant vitamin
supplements/foods to prevent CVD.
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| Knowledge
Objectives: Specialists |
- Explain
the effects of the metabolic pathways from N-6 and N-3 fatty
acids to prostaglandins on vascular reactivity and platelet
aggregation.
- Explain
the effects of N-3 fatty acids on plasma triglyceride levels
and cardiac electrical conduction.
- Describe
the effects of altering dietary folate, B6, B12,
or methionine on homocyst(e)ine levels and CVD risk.
- Describe
at least five dietary intervention clinical trials and five
observational studies that demonstrated a reduction in the
incidence of CVD, and identify the specific dietary constituents
associated with cardiovascular health in each study.
- Estimate
and justify with scientific evidence the total quantitative
benefit achievable from combining at least five diet and
exercise modifications in the prevention of cardiovascular
disease.
- Describe
the controversy regarding the vascular benefit of adding
antioxidant vitamins and foods to the diet.
- Take
a comprehensive patient medical history, and identify any
risk factors and symptoms of cardiovascular disease present.
- Take
an appropriate nutrition history to determine the intake
of saturated fat, cholesterol, sodium, soluble fiber, fruits,
vegetables, complex carbohydrates, alcohol and vitamin,
mineral and herbal supplements.
- Conduct
a focused physical examination that includes assessment
of abdominal obesity estimated by waist circumference and
accumulation of cholesterol in the skin, tendons, and eyes.
- Given
a patients medical history, select appropriate lipid
laboratory tests to estimate CHD risk using the NCEP ATP
III Guidelines.
- Distinguish
between normal and abnormal serum concentrations of total
cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides
using NCEP ATP-III criteria.
- Assess
a patients risk using the Framingham Risk Assessment
Tool for Estimating 10-year Risk of Developing CHD.
- Given
a patients medical history and the results of appropriate
lipid laboratory tests, propose an optimal set of goals
for nutritional risk factor reduction using the NCEP and
AHA guidelines for nutrition and exercise.
- Recognize
the cumulative significance of appropriate dietary fats
and maintaining a diet in the prevention of CVD.
- Demonstrate
a commitment to promoting dietary and lifestyle modifications
that can diminish the risk of cardiovascular disease.
- Recognize
the value of a cardiovascular disease prevention diet for
nutritional health in general, including maintaining normal
body weight.
- Demonstrate
a personal commitment to serve as a positive role model
for patients by maintaining a healthy diet and active lifestyle
consistent with reducing CVD risk.
- Encourage
fellow physicians to refer patients with CVD or CVD risk
to registered dietitians or other credentialed healthcare
professionals as appropriate to assist with medical nutrition
therapy goals.
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Food
examples for some of knowledge objectives
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Foods
high in
Cholesterol:
egg yolks, shrimp, liver, kidney
Saturated
fat: Palm oil, coconut oil, whole milk and cheese, fatty
red meat
Monounsaturated
fat: olive oil, avocado, canola oil, nuts
Polyunsaturated
fat: safflower oil, corn oil, soybean oil, sunflower oil
N-3
fatty acids: salmon, herring, halibut, flax seed, nuts
Folate:
brewers yeast, orange juice, liver, legumes, leafy vegetables,
fortified grain products
Vitamin
B6: Meat, poultry, fish, green leafy vegetables,
whole grains, legumes
Vitamin
B12: Meat, poultry, fish, eggs, dairy products
Methionine:
whole grains, sesame seeds, sunflower seeds, brewers yeast
Sodium:
canned, frozen and dehydrated foods, chips, restaurant food
Potassium:
Fruits and vegetables, milk, potatoes
Calcium:
dairy products, calcium-fortified foods (e.g. orange juice, cereals)
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Examples
of genetic variations/control of cholesterol levels:
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2
examples
Apo E4: raises LDL
Apo A-IV polymorphisms: may reduce response to dietary cholesterol
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