Chapter 27 - Dyslipidemia Flashcards
(123 cards)
Primary (familial) hypercholesterolemias (FH)
Genetic defects that cause severe cholesterol elevations.
Heterozygous familial hypercholesterolemia (HeFH) and Homozygous familial hypercholesterolemia (HoFH).
Familial dyslipidemias are categorized by the Fredrickson classification.
SECONDARY(OR ACQUIRED)
poor diet and lack of physical activity –> central adiposity.
Medical conditions that cause dyslipidemia include hypothyroidism and diabetes.
very high risk and must be treated: LDL > 190 and TG > 500 mg/dL
Friedewald equation:
Lipid panels (i.e.,TC,HDL,TG) are taken after 9- 12hour fast.
Non-HDL and apoB do not require fasting for accurate assessment. If not fasting, the TG level can be falsely elevated, which can cause an incorrect LDLcalculation.
LDL = TC - HDL - (TG/5)
not used when the TGs are > 400 mg/dL.
Drug that inc LDL + TG
Immunosuppressants (cyclosporine and tacrolimus)
Atypical antipsychotics
steroids
Effavirenz
Diuretics
Protease inhibitors
(Imm A Ste Eff Di Pro)
Drugs that inc LDL
fish oil (Except Vascepa)
Drugs that inc TG
Propofol
IV lipids emulsions
bile acid sequestrants (5%)
Conditions that inc LDL/ TG …
obesity
smoking
alcoholism
diabetes
hypothyroidism
nephrotic syndrome
liver/ kidney disease
poor diet
pregnancy
pcos
non HDL
non HDL = TC - HDL
desirable < 130 mg/dl
LDL levels
desirable: <100 mg/dl
high: >= 190
HDL
desirable:
men: >= 40 mg/dl
women: >= 50 mg/dl
TG
desirable: < 150
very high: >= 500 (Severe hypertriglyceridemia)
Calculating ASCVD risk Input
■ Gender, age (20 - 79 years) and race
■ TC and HDL
■ Systolic blood pressure & whether antihypertensive treatment is used
■ The presence of diabetes and smoking status
(9)
when should the ASCVD risk assessment be repeated in those with a low 10 yr risk
This risk assessment should be repeated every 4 - 6 years in those found to be at a low 10-year risk (<7.5%).
Risk score is not needed for patients with:
and why
- clinical ASCVD,
- diabetes or
- LDL >= 190 mg/dL
as all patients in these groups should be started on a statin.
If a risk-based treatment decision is still uncertain after a quantitative risk assessment
Additional risk-enhancing factors should be considered to assist with decision making.
Risk-enhancing factors:
- very high LDL,
- family history of premature ASCVD,
- metabolic syndrome,
- chronic kidney disease,
- history of preeclampsia or premature menopause,
- chronic inflammatory disorders,
- high CRP,
- high coronary artery calcium score (CAC)
- abnormal ankle brachial index.
What does CAC indicates?
The CAC measurement is helpful in deciding if statins should be initiated in those with 10-year ASCVD risk of
7.5 - 19.9%.
A CAC score >= 100 Agatston units indicates statins should be initiated.
What is an ASCVD event?
CVA, TIA, ACS, MI, angina, CAD, PAD
Lifestyle modification
- Diet to maintain a healthy weight (BMI18.5 - 24.9 kg/m 2)
- Rich in vegetables, fruits, whole grains and high-fiber foods, such as in plant-based and Mediterranean diets.
- Fish with high-fat content (rich in omega-3 fatty acids).
- Limit saturated fat, trans fat (partially hydrogenated) & cholesterol by choosing lean meats, non-meat alternatives & low-fat dairy products.
- Aim for 5 - 6%of calories from saturated fat.
- Limit added sugars & salt
- Limit smoking and alcohol
- Aerobic physical activity 3 - 4 times per week,
lasting 40 minutes/session (decreases LDL3 - 6 mg/dL)
NATURAL PRODUCTS that can lower LDL
- Red yeast rice (contains naturally occurring HMG-CoAreductase inhibitors in low amounts.)
- Fibrous foods
What organ damage can many cholesterol lowering drugs cause? Explain.
- Drugs: niacin, fibrates, potentially statins and ezetimibe
- Cause: Liver damage
- Do not use if the AST or ALTis > 3 times the upper limit of normal.
- Statins: nonsignificant inc in liver enzymes but LFTs should still be monitored.
MOA of Statins
inhibits the enzyme 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase, which prevents the conversion of HMG-CoA to mevalonate.
rate- limiting step in cholesterol synthesis.
What statin intensity should be used for Secondary Prevention of ASCVD
high intensity
except: (Give mod)
- not a candidate for high-intensity or
- patient > 75 years with LDL 70-189 mg!dL
primary elevation of LDL >= 190 mg/dl
give high int statin
Diabetes + Age 40 - 75 years + LDL between 70 -189 mg/dl
Regardless of 10-year ASCVD risk –> Mod
Multiple ASCVD risk factors –> High