LIPIDS Flashcards
Population of Europe 2016 roughly
0.7 billion
Population of US roughly 2016
0.3 billion
Population in low income countries roughly 2016
0.6 billion
Population in high income countries 2016 roughly
1.2 billion
Total no of deaths worldwide 2016 roughly
Near 60 million
Percentage and number of deaths due to cardiovascular disease worldwide
30% and 17.5 million in 2015-16 . In US also 30%, but in Europe nearly 50% . I don’t know the reason
Most common types of cardiovascular disease
80% heart attack and strokes
_______% of reduction seen in CVD is due to change in risk factors and ______% due to improved treatment.
50 & 40
SCORE system is not required for assessing risk in
- CVD
- Diabetes
- CKD
SCORE estimates
First FATAL Heart attack, stroke, other occlusive arterial disease, SCD
How to convert SCORE risk estimate to total CVD event risk
Multiply with 3 for males
With 4 for females
Lower in older persons
Most frequent monogenic disorder a/w premature CVD
Familial hypercholesterolemia
——is technically not fat
Cholesterol = steroid plus alcohol
Incidence of DM with statins
1in 500
SGPT and statins
> 3 times change or reduce
CPK and statins
> 10 times stop??
Statins for Diabetes at less than 40 yrs
Consider if multiple risk factors
Role of statins in pregnancy
CONTRA INDICATED
Why statins not used for primary prevention in young age 20s& 30s
- SAFETY of statins over decades of therapy uncertain .
- Also uncertain whether long term treatment leads to better OUTCOMES compared with postponing treatment until CV risk rises to an absolute level where treatment becomes warranted .
Mobile and precautions of PPI
- Don’t keep on same side pocket
- Keep on opposite ear
- May be keep 15-20 cm away from PG
Bile salts are made from
Cholesterol
—-% of bile acids are re absorbed
95% by enterohepatic circulation
Indications for statin treatment in children with hyperlipidemia
LDL above 190 and AGE 8 yrs or above not controlled with diet
Incidence of FH-hetero and homo
Heterozygous 1:200-500
Homo-1: 1 million
3 conditions where statin treatment is considered as secondary prevention (other than CAD &stoke)
- Peripheral arterial disease
- Multiple risk factors that confer a 10-year risk of CVD >20%
- Chronic kidney disease with estimated GFR <45 mL/min per 1.73 m2*
Effect of diet on LDL Cholesterol
In occasional patients with poor baseline diets, marked dietary change can lower LDL-C by as much as 30 percent
Otherwise around 5_7%
Framingham is a place in
Northeastern US
Why statins are given at night
The majority of cholesterol synthesis appears to occur at night
Criteria for FH Diagnosis-3 types
- Dutch lipid clinical network criteria - commonly used
- Simon Broom register criteria
- WHO criteria
Total cholesterol level beyond which FH is to be suspected
310
Gall stones are an indication to stop treatment with……….
Fenofibrate
USPSTF 2016 recommendations for primary prevention with statins
ASCVD risk more than 10 % and at least one risk factor:: (Age40-75) Risk factors 1. Dyslipidemia-LDL > 130; or HDL <40 2.DM 3.HTN 4.Smoking
NOT FOR LDL>190 or FH
NNT to prevent one major adverse CV event or death with statin primary prevention
50-200
Total cholesterol level in Homozygous FH
More than 500
Homozygous FH patients develop —– before 20
CAD and Aortic stenosis before 20 and die before 30
Lomitapide is
Microsomal Triglyceride Transfer Protein
If left untreated Heterozygous FH will develop CAD before
55/60- males/ females
Frequency of Heterozygous FH
1/500 to 1/200
Around 14-34 million estimated pts worldwide
The risk of CHD in definite or probable Heterozygous FH
At least 10 fold
Incidence of FCH( familial combined hyperlipidemia)
1:100
Useful criteria for diagnosis of FCH
Apo B > 120 +TG>133 +family h/o of premature CAD
LDL particle number starts increasing when TG is more than
133 i.e. 1.5 mmol/l
SCORE risk assessment is for people without
DM,CKD, or FH
Name a bile acid sequestrant
ColeSEVelam
Role of statins in NAFLD/NASH
Statins are safe and may help Resolution of liver disease
Reduces ASCVD more than in people with normal liver function
Risk of new onset DM with moderate intensity statins
1 per 1000 pt years
Incidence of permanent liver damage with statins
1 in 2 million treated subjects
Moderate intensity statins should be able to reduce LDL cholesterol by
> 30-<50%
High intensity 50% or more
Effect of statins on HDL
5-15% increase
Effect of Alcohol consumption in South asians in INTERHEART study
No protective effec
INTERHEART study population
Acute MI patients in 52 countries- case control study
Atherogenic dyslipidemia of South Asians
High TG + Low HDL
But total cholesterol and LDL are lower than western popln
CKD Stage 3 b is
GFR- 30-44 ml/mt
Stg 3A is 45-59ml/mt
Ankle brachial index of — is considered as ASCVD
<0.9
Coronary artery calcium score more than—-puts pt at high risk of coronary disease
300 or more (above 100 is moderate risk)
Also non stenotic carotid plaque
Lp(a) 50 or more (Above 20 moderate risk)
Indian guidelines
When to start statins in Diabetes
Age of 40yrs
Or if DMof > 15 yrs and Age of 30 yrs
Documented CAD by angiography means
> 10% stenosis
Canadian lipid guidelines
If triglycerides more than ——don’t use friedwald formula
400
Apo B is equivalent of
Non HDL cholesterol
Even direct assessment of HDL or LDL is accurate only if
TG is normal
Seasons and cholesterol
TC and HDL high during winter
CVD risk assessment is not required if TC is
More than 290 or inFH
Non HDL Cholesterol =
Total number of atherogenic lipoproteins in plasma
Lipoprotein (a) is
LDL + apoprotein(a)
Effect of high TG on Sodium
Pseudohyponatremia
Apo lipoprotein assay and fasting
Not required
If u suspect if high concentration of small dense ldl is suspected
Do Apolipoprotein B assay
Apo C III is
A new Cardiac risk factor
Role of Apo B in risk prediction
Apo B= LDL=Non HDL cholesterol
Apo A level corresponding to low HDL
Less than 120 ms/dl and 140 males and females respectively
Effect of high TG on HDL and LDL
Decrease HDL and increase SMALL DENSE LDL
External manifestations of FH
Xanthoma, Xanthelema, Arcus cornealis before 45
How to do CVD risk scoring in CKD
No risk scoring required
Treatment principles of high LDL
If low risk- treat if LDL > 190
High risk category treat LDL >100
Very high risk category treat if LDL > 70
Markers of sub clinical atherosclerotic vascular damage
ABI, Coronary Artery calcfn,Carotid USG
CPK and stopping statins
> 10 times-STOP
Plenty of water
Weaker statins-Fluva/Prava after CK is normal
Statins dose and muscle toxicity
PRIMARILY at high doses
Cholesterol has the structure of —
Steroid
It is called a STEROL as it is Steroid plus AlcohOL
Pseudo hypertriglyceridemia is seen in
Hyperglycerolemia. The methods used estimate glycerol and triglycerides
Treatment goal in familial hypercholestrolemia
LDL <100 or less than 50% of original value ( for HeFH)
For Homozygous FH LDL<150 is the target
Incidence of FH
1 in 250 Heterozygous
1 in 1 million Homozygous
Difference between criteria for FH Homozygous and Heterozygous
Homozygous- LDL>500 or treated LDL>300 with clinical criteria
Heterozygous- Simon Broom or Dutch Lipid clinic criteria
Total number of FH patients in world
10 million
of these 7000 pts will be Homozygous😏 ( 1in 1 million incidence; total world popln of 7 billion)
So majority HeFH.
85% of males and 50% of these females will develop ASCVD before 65 yrs if proper care not taken
Cholesterol levels in pregnancy
Increase by 25-50%.
B/w 18-36 wks of pregnancy
Only cholesterol medicines permitted in pregnancy
Also lactation
Bile acid Sequestrants.
Not absorbed into blood
Reduce LDL by 15%
LDL apheresis during pregnancy frequency..
Weekly or biweekly
FH is suspected when LDL is above ……. in adults and above…. in children
190/ 160
Cascade screening means
Testing the family members for same illness
PCSK9 inhibitors work by
Preventing LDL Receptor degradation inside liver cells thus increasing LDL Receptors on liver surface
So more and more LDL from extra cellular fluid is removed
Patients with FH has a ….times higher risk of heart disease
20 times
FH foundation
In HeFH , the time by which pts develop heart disease
50% by 50 yrs males
30% by 60 yrs in females
Effect of cetp inhibitors on cardiac risk
Cetrapibs - Neutral or Negative
1% reduction in LDL reduces CAD risk by
1%
Statin studies in ACS population
MIRACL,PROVE IT,A-Z,IMPROVE IT
LDL Goal in high risk patients-American guidelines
1988 ATP 1
1993 ATP 2
2001ATP 3
2004ATP 3 update
2006 AHA ACC update
1988-130 less than FRAMINGHAM
1993-100 equal to or less than
2001- 100 less than
2004- 70 optional - less than ( HPS, PROVE IT, ASCOT LLA,PROSPER, ALLHAT LLT)
2006- reasonable (TNT,IDEAL)
Change Lipid guidelines in 2013 and 2016
2013- ACC AHA removed targets
2016- ESC- came back to Lower the better slogan
Also new entry of 50% or more reduction from baseline in very high and high risk subsets
Primary target in moderate and low risk is <115
Serum levels of LDL is predominantly controlled by ….
Hepatic LDL receptor
LDL receptor binds to …….. on the LDL
Apo B 100
PCSK 9 reduces LDL by what %
57% evolucumab
50-57 Alirocumab
Severe myopathy incidence with statins
0.1%
Increase in creatinine to say rhabdomyolysis
0.5 mg/dL
Statins with less penetration into muscle
Pravastatin, Rosuvastatin- water soluble statins
eGFR and cardiovascular risk
GFR<60- high risk of CAD
GFR < 30– very high risk
PCSK9 inhibitors approved for use in US and Europe
Evolocumab and Alirocumab
Lipoprotein small a is
LDL like particle PLUS apo lipoprotein small a which is attached to apo B of the LDL like particle
When to interrupt Statin therapy
CPK > 5 Times Normal, SGPT >3 Times Normal
Annals of Pediatric cardio 2014
What happens in liver with PCSK9 inhibitors
There will be more cholesterol UPTAKE by liver(as LDL-R in liver is unregulated)and liver will convert these to more bile acids.
INCLISIRAN is ————
Its given as a ——————
PCSK9 synthesis inhibitor.(not Mab like alirocumab etc)
It’s given as twice YEARLY injection
% of 0-14 yr population in world
26%
2017 ORION 1 Trial is with
INCLISIRAN- PCSK9 synthesis inhibitor
Study of CETP inhibitor Evacetrapib inCVD
2017 ACCELERATE study
INCLISIRAN lowers LDL by
50%
CETP inhibitor Evacetrapib reduces LDL by
Around 40% - 2017 ACCELERATE trial
Trials which showed LDL can be reduced to 20 without CNS or Liver problem
IMPROVE-IT( ezetemibe)
FOURIER ( Evolocunab)
Ticagrelor needs to be stopped how many days prior to surgery
3 days( previously 5)
ESC 2017