CVPV Flashcards
What is the amount of blood pumped in one minute called?
cardiac output
Lower cardiac output means
poor perfusion
Hypertension is the cause of
every other heart problem
1/8 death in the world
3rd leading cause of death
Hypertension BP is usually
140/90 or higher
What is the most common primary diagnosis in the US?
Hypertension
What is the most common modifiable risk factor for CV disease?
Hypertension
As hypertension gets higher, the cardiovascular disease
it gets worse
Hypertension Crisis
180/120
- a lot of concern (stroke, perfusion)
Why is there more and accelerating hypertension in the US?
obesity (poor diet and exercise) - sitting
Causes of hypertension
- increase in cardiac output (too much fluid)
increase heart rate and stroke volume - increase peripheral resistance (hypothermia/stress)
increase viscosity, vasoconstriction
Vasoconstriction
decrease in vessel diameter (shrink)
Vasodilation
increase in vessel diameter (expand)
Primary hypertension
not caused by identifiable disease/cause
- overactive sympathetic nervous system (RAAS, too much sodium)
Secondary hypertension
caused by another disease, stress
- renal vascular disease
- valve disorders
- sleep apnea
- pregnancy
- thyroid disorders
- drugs (oral contraceptives, antihistamines, corticosteroids)
If a patient has secondary hypertension, how should it be treated?
treat the cause
Secondary hypertension can be caused by what types of drugs?
oral contraceptives
antihistamines
corticosteroids
What does continued HTN do to the blood vessels?
Hypertrophy (enlarge)
Hyperplasia (replicate)
inflammatory
due to stress and stretching of vessels causes damage
macrophages will come to help but only narrow the vessels
Hypertrophy
enlargement of cells
Hyperplasia
replicate
What 2 things happen to the cells during the inflammatory response?
Hypertrophy
Hyperplasia
Risk factors Hypertension and cardiovascular disease
family hx
cig smoking
obesity
- high sodium, low potassium, calcium, and magnesium
heavy alcohol consumption
African American and age
diabetes
Men are at a higher risk factor of hypertension in what age range?
Women?
early to middle adulthood
over 50
What is considered the “silent killer”?
hypertension
- early stage no s/s other than gradually increasing B/P
- only noticed in crisis
S/S of hypertension
asymptomatic
HA
blurry vision
chest pain
dizzy
epistaxis
flushed face
Epistaxis
nose bleeds
Complicated Hypertension
sustained hypertension effects beyond hemodynamics organ involvement
What 2 major mechanisms of tissue damage can occur with having complicated hypertension?
Ischemia (decrease O2 to certain areas)
Edema (swelling of tissues/organs and fluid seeps out)
If we have decreased blood flow, we also have
decreased O2
Complicated HTN occurs commonly in
Kidneys (renal disease) - uncontrolled HTN
Brains - Strokes and vision
Heart (myocardium and coronary arteries)
Lower extremity vessels
When the ventricle’s walls thicken then
less blood goes into the heart
heart now has to work harder to pump out more blood
What lab/test can evaluate hypertension?
none
- looking for underlying reason but not dx
When is hypertension usually dx?
when pt comes in for something else
Log of BP for a month to see a trend and come back
Hx - smoking, diet, listen to lungs
If you see a patient who has one high BP, do you dx them now?
no, only after several months of BPs
What is the most accurate way of evaluating BP
auscultation manual
sit/laying down quietly for 5 mins
arm at heart level
appropriate size
White Coat Syndrome
BP will be high in a Dr’s office
Hypertension Treatment
fix the systolic, then the diastolic will follow
Goal is 130/80
- treat preexisting conditions
1st - lifestyle modifications (DASH)
- moderate exercise and alcohol consumption
- stop smoking
What diet should Hypertensive patients be on?
- rich in fiber and potassium, low in dietary sodium and saturated fats including fruits and veggies, low in dairy and total fat and carbs
- encourages the intake of whole grain products, fish, poultry, and nuts
- limits red meats and sweets recommended
DASH (Dietary Approaches to Stop Hypertension)
Any drugs used to treat the patient are also accompanied by the nurse
educating the pt on lifestyle modifications
- combine with diet and exercise
Antihypertensive Drugs
Ace Inhibitors
Beta Blockers
Calcium Antagonists
ACE Inhibitors end in
pril
Beta Blockers end in
olol
Calcium Antagonists have what in the name
Ca
Alpha-Adrenergic Antagonists (Alpha - Blockers)
Side Effects
orthostatic hypotension
vertigo
tachycardia
sexual dysfunction
Alpha Blockers end in
osin
Furosemide is also known as
Lasix
How long can furosemide stay in the body
LA sts SIX hours
usually during the day (if night, get up often for bathroom)
Side effects of Furosemide
Dysrrhthmias
due to a decrease K
decrease BP
increase blood glucose
sunburn very easily
Furosemide is used for
too much fluid
(edema, hypertension, ascites)
Hydrochlorothiazide is used
diuretic used to lower BP (mild diuretic)
What is the downside of HCTZ?
Important nurse assessment?
electrolyte loss
Monitor electrolyte balance
Which diuretic is used mainly for hypertension but a mild version of a diuretic than furosemide?
HCTZ
Hypertension Nursing Interventions
daily weight
I&O accuracy
Urine output
BP response
Electrolytes
Pulses
Ischemic Episodes (TIA)
4 C Complication
TIA means
Transient Ischemic Attack
4 C’s Complications of hypertension
Coronary Artery Disease
Chronic Renal Failure
Congestive Heart Failure
Cerebral Vascular Accident (stroke)
Success in Tx for Hypertension depends on
compliance (tell them to continue meds despite fatigue)
6 weeks and give them power by checking BP
Orthostatic Hypotension is also known as
Postural Hypotension
Orthostatic Hypotension is considered
Systolic = drop of 20 mmHg or greater
Diastolic = drop of 10 mmHg or greater
when standing up
Acute Orthostatic Hypotension reasons
Altered electrolytes
New med
Prolonged immobility
starvation
physical exhaustion
vol depletion
venous pooling
elderly - esp. falls**
Chronic Orthostatic Hypotension
Secondary to specific disease
- endocrine, metabolic, CNS, PNS
Idiopathic
no known cause
Idiopathic Orthostatic Hypotension
generalized degeneration of the CNS
1/3 of elderly affected (postprandial - after meals)
Orthostatic Hypotension has a significant
fall risk
S/S of orthostatic hypotension
dizzy
blurred loss of vision
syncope
fainting
after meals in elderly
Monitoring Orthostatic BP
lying/sitting/standing BP
3-4 times a day
more than 20
How do you diagnose orthostatic hypotension?
tilt table test
Tx of Orthostatic hypotension
- PRIMARY FALL PRECAUTIONS
- assist pt when moving and repositioning
- supportive devices
- eliminate the cause (meds, volume, electrolyte)
T/F: Vasoconstriction leads to increased blood pressure readings.
True
Orthostatic hypotension is defined as a drop of __________ or more when going from supine to standing. Select all that apply.
a. 10 mmHg systolic
b. 20 mmHg systolic
c. 10 mmHg diastolic
d. 20 mmHg diastolic
b. 20 mmHg systolic
c. 10 mmHg diastolic
The coronary artery supplies blood to the
heart muscle
Preload
stretch of the heart filling up with blood
caused by the pressure created by the volume of blood within the ventricle
Afterload
the amount of resistance to the ejection of blood from the ventricle
In terms of a slingshot, explain preload and the afterload
Preload is the stretch before the shot
Once let go the afterload kicks the blood out
Atherosclerosis
accumulation of lipid (fatty substance) in vessel walls
- inflammatory response
- fibrous cap forms
- ischemia
Atherosclerosis is more common in what vessels
coronary arteries
bc of tiny turns
In simple terms, explain atherosclerosis
A tiny injury attracts cells to fix it
Inflammation occurs and plaque causes narrowing
Blood clots cause complicated lesions when caught into the injury
preload increases in
hypervolemia
regurgitation of cardiac valves
Post-catheter femoral pt what do you do with a dressing
Look and palpate (hematoma) at the site
Check pulse distal to the site (pedal)
If you see bleeding, circle
2-6 hours leg straight
HOB at or less than 30 degrees
fluid to flush dye out
In a Post-op FEM-POP bypass graft surgery patient, how often do you check the foot’s pulse, color, temp, and Doppler?
every hour for 8 hours
then every 4 hours for the rest of the 24-hour period
Why do you not give asthma pts Beta blockers?
cause bronchospasms or make theirs worse
What Beta blocker would you give an asthma pt?
Metoprolol (less of bronchospasms)
ST depletion is a sign of
ischemia
ST elevation is a sign of
infarction or injury
When discharge teaching a pt with CHF, what is the most important thing they should check?
daily weight (call if over 3 pounds in a day)
How often do you check VS on a pt post-op from surgery?
1st hour = every 15 mins
2nd hour = every 30 mins
3-4th hour = every hour
What does infarction mean?
lost blood flow to the area so lost O2 content
In myocardial ischemia, what should you do regarding Oxygen
give them O2 to make the heart work more effectively and slowly
- such as ACE and Metoprolol
Intermittent claudication is associated with what disease?
Peripheral Artery Disease
Pre-op on a FEM-POP bypass, how should the patient sit?
dangling legs
help blood flow
Post-op on a FEM-POP bypass, how should the patient’s leg be situated?
elevated
decrease pressure
If you see blood on a dressing after a patient is post-op from surgery, what should the nurse do?
reinforce with dressing
DO NOT REMOVE
make a circle and palpate for hematoma
What lab is the most specific to identifying myocardiac damage
Troponin
Diagnostic test for angina
stress test (Thalium)
- also with an Echo (dye shows block)
- possible Cath Lab
What test is used to monitor heparin?
AntiXa every 6 hours
Non-modifiable risk of atherosclerosis
age
gender
family hx
ethnicity
Modifiable risk factors of atherosclerosis
Obesity (High cholesterol and inactivity)
smoking
hypertension
hyperglycemia
stress
What type of cholestrol is good to be high?
HDL
What types of cholesterols need to be low?
LDL, total, and triglycerides
What is the #1 killer of women?
Coronary Artery Disease
- >55 y/o CAD is equal to men
Myocardial Ischemia pathology
interfere with blood flow through the coronary arteries
not enough O2
narrowing of vessels = not enough blood flow/O2
What are the 3 possible causes of Myocardial Ischemia
vasoconstriction
atherosclerosis
thrombus formation
- narrowing by 50% greater risk
Myocardial Ischemia either has
decreased supply
increase demand
of blood flow/O2
In Myocardial Ischemia, the demand _________ supply.
exceeds
After ___ secs, the heart will become ischemic due to coronary occlusion, and after a few ________ the heart cells lose the ability to contract
What needs to be done before that time?
10 secs; minutes
- get blood flow/O2 back to the area
Heart cells only remain viable for ____ mins in an ischemic condition.
20 (Time is Muscle)
If perfusion is not restored, then ___________ will begin after 20 mins
infarction
Angina pectoris is just
chest pain
Angina Pectoris is caused by
myocardial ischemia(not enough O2 to heart)
Turbulent blood makes it more likely for
blood to stick and bounce off walls and cause blood clots
- leads to myocardial infarction
Factors causing anginal pain
- physical exertion
- exposure to cold
- eating heavy meal
- stress
Stable angina
predictable pain on exertion
- lasts 3-5 mins with pain relieved at rest/nitrates
- no damage if blood flow restored
Prinzmetal Angina
unpredictable caused by vasospasm
- at rest
Prinzmetal angina is treated with
Calcium channel blockers (CA in name)
help with spasms of the vessel walls
Silent ischemia is a type of
angina
Silent ischemia is known by
EKG changes with no pain or symptoms
- ST changes indicating MI
Unstable angina is also known as
preinfarction
Unstable angina occurs
at rest or minimal activity
increasing severity or frequency
Unstable angina could be with exertion but
does not stop the pain when sitting or treating
Unstable angina (20%)can lead up to
MI (myocardial infarction)
What treatment could possible treat stable angina
nitrates
What pain would we expect pts to feel leading up to a heart attack?
Unstable angina
Modifiable risk factors for coronary artery disease include which of the following?
Select all that Apply.
High cholesterol
Hyperglycemia
Ethnicity
Physical inactivity
Smoking
High cholesterol
Hyperglycemia
Physical inactivity
Smoking
What is the preventative actions and treatment options of angina?
Diet
Exercise (realistic goals and stop with chest pain)
Medications
Tobacco cessation
Managing HTN
Controlling DM
Managing stress
Evaluation of chest pain includes
cardiac assessment (auscultation, when started, rapid or extra sounds)
EKG
Labs
S/S of angina
indigestion
choking or heavy pressure on the sternum
radiate pain to neck, jaw, arms(left)
weak or numb in the upper extremity
SOB, pale, sweating, dyspnea
Dizzy, N/V
Angina/MI pts symptoms can vary greatly with
elderly and women
DIABETICS (neuropathy)
Elderly pts will complain of what s/s of angina AND MI
dyspnea
Women will complain about what s/s of angina and MI
Fatigue (major)
Acute Coronary Syndrome
umbrella term for unstable angina and myocardial infarction