CAD 34 Flashcards
Major cause of death in US
cardiovascular dz
most common type of cardiovascular dz
CAD
CAD is included in what general category?
atherosclerosis
Word Break down: “athere” is Greek for
“fatty mush”
Word Break down: “skleros” is Greek for
“hard”
CAD is
focal deposit of cholesterol and lipid, primarily within the intimal wall of the artery
Two things that play a central role in the development of atherosclerosis
inflammation and endothelial injury
C-reactive protein is
a protein produced by the liver, nonspecific marker of inflammation
CRP rises in?
systemic inflammation, many patient with CAD have a increase CRP
Chronic elevations of CRP are associated with
unstable plaques and oxidation of LDL, leading to increasing uptake by macrophages in the endothelial lining
When CAD because symptomatic the dz is_______.
advanced
What are the developmental stages in atherosclerosis?
1) Fatty streak, 2) fibrous plaque resulting from smooth muscle cell proliferation, 3) Complicated lesion
What is are Fatty Streaks?
the earliest leasion of atherosclerosis. Characterized by lipid filled smooth muscle cells
When does a yellow tinge appear on smooth muscle cells?
when streaks of fat develop
What is it called when collagen covers the fatty streak?
Fibrous Plaque
What are complicated lesions?
final stage in atherosclerosis. Fibrous plaque grows, and inflammation can result in plaque instability, ulceration and rupture
What happens when the inner wall of the artery is compromised?
platelets accumulate in large numbers which may lead to a thrombus
what are the two factors that contribute to the growth of collateral circulation
1) the inherited predisposition to develop new blood vessels, 2) the presence of chronic ischemia
what are the nonmodifiable risk factors for CAD?
age, gender, ethnicity, family hx, genetic inheritance
what are the modifiable risk factors for CAD?
elevated serum kipds, elevated blood pressure, tobacco use, physical inactivity, obesity, diabetes, metabolic syndrome, psychological states and elevated homocysteine level
who has the highest incidence of CAD and MI? (gender/race/age)
white, male middle aged
compare heart disease to breast cancer (risk)
heart dz kills 10 times more women than breast cancer
Serum cholesterol level associated with a risk for CAD?
more than 200mg/dL
fasting triglyceride level associated with a risk for CAD?
more than 150mg/dL
what are lipoproteins?
lipids that combine with proteins. Vehicles for fat mobilization and transport
The three classifications of lipoproteins
high density lipoproteins, low density lipoproteins, and very low density lipoproteins
what do HDLs do?
carry lipids away from arteries and to the liver for metabolism
What are the two types of HDLs?
HDL2 and HDL3
who have higher levels of HDL?
children and women
HDL levels decrease with
CAD and with age
things that increase HDLs
physical activity, moderate alcohol consumption and estrogen administration
describe LDLs
contain more cholesterol than any of the other lipoproteins and have affinity for arterial walls
desribe VLDLs
contain both cholesterol and triglycerides and may deposit cholesterol directly on the walls of the arteries
Diseases/drugs and genetic disorders associated with elevated triglycerides
type 2 diabetes, chronic renal failure, corticosteroids, HRT, and some genetic disorders
lifestyle factors that contribute to elevated triglycerides
high alcohol, high intake of refined carbohydrates and simple sugars, and physical inactivity
what are the 7 factors that generate a risk score for having a nonfatal MI or dying from a coronary event
age, gender, use of tobacco, Systolic BP, use of BP medication, total cholesterol, HDL levels
Low risk for development of CAD
one of the risk score factors and an LDL <160mg/dL
HTN increase the risk of death from CAD by
10 fold in all persons
Normal BP
<120/80
prehypertension
120-139/80-89
Stage 1 HTN
140-159/90-99
Stage 2 HTN
> or equal to 160/100 mmHg
third major risk for CAD
tobacco use
tobacco use increase risk of development of CAD by
two to six fold
benefits from smoking cessation
are dramatic and almost immediate, CAD mortality rates drop to those of nonsmokers within 12 months
examples of smoking cessation strategies
group counseling sessions, nicotine replacement therapy, smoking cessation medications and hypnosis
describe physical inactivity
lack of physical exercise on a regular basis
healthpromoting regular physical activty example
brisk walking for at least 30 minutes five or more times a week
define obesity
body mass index greater than or equl to 30kg/m2 and a waist circumference greater than or equal to 40 inches for men and 35 inches for women
obese persons may increase
levels of LDLs and triglyercerides
likelyhood of an obese person developing HTN
three times more likely than a person of normal weight
management of diabetes
lifestyle changes and drug therapy to achieve a hemoglobin A1C level <7%
personality type that may be more prone to MI
type A person: suppress anger and hostility, sense or time urgency, is impatient and often creates stress and tension
psych factors that increase risk of CAD
depression, acute and chronic stress, anxiety, hostility, anger, lack of social support
homocysteine is
produced by the breakdown of the essential amino acid methionine
high homocysteine levels possibly contribute to atherosclerosis by
damaging the inner lining of blood vessels, promoting plaque buildup, altering the clotting mechanisms to make clots more likely to occur
use of cocaine and mathamphetamine can (heart related SE)
produce coronary spasm resulting in MI and chest pain. Sinus tachycardia, high BP, angina, anxiety Likely to be seen in ED for chest pain are initially indistinguishable from a patient with CAD.
health history screening topics
family hx, cardiovascular symptoms, environmental factor including eating habits, diet, level of exercise, psychosocial hx (tobacco use, ETOH, stress) negative psych states, work environment, and stress associated with work
FITT formula
Frequency, Intensity, Type, Time of exercise
American College of Cardiology/ AHA recommended exercise program
at least 30 minutes of moderate physical activity on most days of the week, resistance weight training added two days a week can help treat metabolic syndrome and improve muscle strength
diet teaching: food types that are major sources of saturated fat and cholesterol
red meats, eggs, whole milk
diet teaching: fat intake
30% of calories, most coming from monounsaturated fats
fatty acids that reduce the risks associated with CAD when consumed regularly
Omega 3
dietary teaching: for individuals without CAD - AHA recommends eating (omega 3 topic)
fatty fish twice a week because fatty fish such as salmon and tuna contain two types of omega 3 fatty acids, recommends eating tofu, and other forms of soybean, canola walnut, flaxseed because these products contain alpha linolenic acid which becomes an omega 3 in the body
dietary teaching: supplement teaching for CAD patients
recommend taking EPA and DHA supplements
how often is a complete lipid profile recommended
every 5 years beginning at age 20
elevated cholesterol treatment (nonmed)
dietary caloric intake, restriction (if overweight), decreased dietary fat and cholesterol intake, and increased physical activity
most widely used lipid lowering drug
statins- drug inhibit the synthesis of cholesterol in the liver by blocking hydromethylglutaryl coenzyme A reductase
another drug common prescribed for people at risk for CAD (unless contraindicated)
low dose aspirin (81 mg)
chronic stable angina
chest pain that occurs intermittently over a long period with the same pattern of onset, duration and intensity of symptoms
silent ischemia
ischemia that occurs in the absence of any subjective symptoms
patients with diabetes have an increased prevalence of silent ischemia because
diabetic neuropathy affecting the nerves that innervate the cardiovascular system
nocturnal angina
occurs only at night, but not necessary when the person is sleeping or in a recumbent posiion
angina decubitus
occurs only when a person is lying down and usualy relieved by standing or sitting
prinzmetal’s angina
often occurs at rest, in response to a spasm of the major coronary artery. Rare. Frequently seen in patients with hx of migraine headache or Raynaud’s phenomenon. Is not usually precipitated by increased physical demand
prinzmetal angina spasm may occur ( health hx)
in the absense of CAD or with documented dz
prinzmetal’s angina: spasm cause
strong contraction (spasm) of smooth muscle in the coronary artery results from increased intracellular calcium
diagnostic studies for angina
cardiac catheterization and coronary angiography provided images of the coronary circulation and ID the location and severity of any lesions