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CHEM 181 Midterm 2- lecture 1
Heart Disease
28
Chemistry
Undergraduate 1
02/27/2012

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Cards

Term
Risk Factors for heart disease?
Definition
low birth weight, being male, hypertension, obesity, smoking, diabetes, stress, microbes, homocystene (parallel factor), high triglycerides, cholesterol
Term
Cholesterol?
Definition

steroid, critical to life but not needed from diet

produced by liver naturally

Term
Familial hypercholesterolemia?
Definition

genetic: large, visible deposits of cholesterol below skin

people affected suffer from very high death rates at young age

Term
At what levels of C-reactive protein can a burst occur?
Definition

>2g/L

--> this will form a blood clot & may block passage of blood to heart, resulting in a heart attack

Term
What did the JUPITER study show?
Definition

people who had elevated levels of C-reactive protein & were treated with crestor saw a 100% reduction of cardiovascular events

for each 120 people treated, 1 event was prevented ($290000 to prevent 1 event)

Term
What did the Frammingham study show? 
Definition
that people with high cholesterol levels also saw an increased risk for heart disease
Term
What did the 7 Countries study show?
Definition
a linear relationship between cholesterol levels and cornoray heart disease
Term
Who was first interested in lipoproteins?
Definition
Joseph Goldstein & Micheal Brown
Term
What are lipoproteins?
Definition
proteins that wrap around fat soluble cholesterol so that it can be transported in the blood stream 
Term
What's the difference between HDL & LDL?
Definition

HDL ("good"): picks up exess cholesterol in body and transports it to live

LDL("bad"): transports cholesterol from liver to cells, but if LDL receptors have already received maximum amount, they will simply deposit the cholesterol in the blood stream=build up of excess cholesterol

Term
What are the ideal levels for total cholesterol?
Definition

<5.2 (<200) = GOOD!

5.2-6.2 (200-239) = risky

>6.2 (>240) = BAD!

 

Term
What are the ideal levels for LDL?
Definition

<3.4 (<130) = GOOD!

3.4-4.1 (130-159) = risky

>4.1 (>160) = BAD

Term
What are the ideal levels for HDL?
Definition

>1.56 (>160) = GOOD!

<1.0 (<140) = Bad!

*opposed to the other levels, having a high amount of HDL is actually desired. The benefits of high HDL are more important than the risks of high LDL

Term
What are the ideal ratios of cholesterol?
Definition

LDL/HDL <3

TOTAL/HDL <4

Term
How do you calculate LDL?
Definition
LDL= (Total cholesterol-HDL-Triglycerides)/5
Term
What does A-1 Milano apolipoprotein do?
Definition
Cleans arteries, neutrilizes free radicals, both of which can reduce artery swelling
Term
Why do farmers feed chickens flax seeds?
Definition
Eggs have high cholesterol (which isnt as big of problem as originally thought) so companies wanted to infuse eggs with omega 3s (contained in flax seeds) to counteract the bad press of cholesterol. Although fish omega 3's help reduce heart beat irregularities, the flax variety has no effect.
Term
Which unsaturated fat oil has the greatest negative impact on cardiovascular health: olive, canola or corn?
Definition

Corn: it contains linoleic acid which increases inflammation in the blood vesssels

Olive & Corn are not beneficial, but neither has any negative effect on cartiovascular health

Term
What did the Women's Health Initiative show?
Definition
women who took diets low in saturated fats, saw no change in heart disease risk
Term
What are some foods that lower cholesterol?
Definition
sitosenol (from pine trees): margarine substitute, soy beans, flax (decreases bile acids), oats (decrease LDL), beans, wine (maaaybe?)
Term
Drug treatments to lower cholesterol?
Definition
garlic, niacin, questrin, statins, Zetia
Term
How do statins work?
Definition
the act as an anti-inflammatory
Term
What does Mevacor (a statin) do?
Definition

active ingredient=lovastatin

interferes with the synthesis of cholesterol in live

Term
What was Lipitor found to do?
Definition
lowered: cholesterol, LDL & triglycerides!
Term
How does Zetia work?
Definition

it blocks cholesterol uptake in the intestine

-> comined with statin it reduced LDL levels but not the already established build up in arteries

preformed no better than a statin alone

Term
What did the Scananavian 4S study show?
Definition

statins reduced risk..

30 patients treated over 5 years for 1 success

Term
What is worse a small LDL or a large one?
Definition

Small: easier to penetrate cells

NMR Lipoprofile tests for LDL size levels

 

low sat fat diets often compensate by taking in more carbs, which can lower overall LDL but increase the amount of small LDL

Term
What is Lipoprotein a?
Definition

A LDL with a new protein attached by an S-S bond

more damaging than LDL alone

interferes with blood coagulation

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