CVPV/EOL EXAM 2 Flashcards
The big picture of CVPV is if blood is flowing to which three locations?
- heart
- extremities
- organs
If blood is not flowing to the heart, extremities or organs why might this be?
- blockage
- Clot
- Vasoconstriction
- Stretched out veins.
What are questions we should ask when we want to know if the heart is being an effective pump?
- are we generating a good cardiac output
- Are the organs being perfused
What is cardiac output?
The amount of blood pumped in 1 min
What might be some reason that the heart is not being an effective pump? list 3
- Ischemic/Infarct issues
- Heart failulre
- Valve problem
The lower the cardiac the __1__ the perfusion to organs and extremities
- Poorer
True or false: The vast majority of cardiac diseases start off as hypertension?
True
Remember the higher the blood pressure __1__ off the problems will be
worse
True or false: Poor diets and poor exercise are a huge factor in hypertension?
True
What are two causes of hypertension?
- Increased cardiac output
- Increased peripheral resistance
Can be both or either or…
What is stroke volume?
The volume of blood pumped out of the left ventricle of the heart during each systolic cardiac contraction
When you have increased peripheral resistance as a cause of hypertension what is going on?
- increased Blood viscosity
- Decreased vessel diameter
True or false: Vasoconstriction due to hyperthermia is a cause of hypertension?
True
What is primary hypertension?
Type of hypertension that can not be placed on a treatable factor
What is secondary hypertension?
- Hypertension that can be fixed by fixing the factor that is causing it?
What salt goes…. water…. does what
Goes
What are some causes of hypertension?
- Renal vascular disease
- Valve disorder
- Sleep apnea
- Pregnancy
- thyroid disorder
- oral contraceptives
- antihistamines
- corticosteroids
What does continued HTN do to the blood vessels?
- Puts stretch and stress on the vessel leading to damage to the vessel.
- Can cause hypertrophy- enlargement of cells
- Can cause hyperplasia- Over replication of cells (seen often in cancer patients)
- Inflammatory response
** both hypertrophy and hyperplasia happen as a result of an inflammatory response that eventually leads to narrowing of a vessell/
What are some risk factors of hypertension?
- Family history
- increasing age
- Cigarette smoking
- Obesity
- Heavy alcohol consumption
- black race
- Men (early to middle adulthood)
- Women (over 50 years)
- High dietary sodium intake
- Low dietary intake of K+, Ca++, Mg++
- Glucose intolerance
True or false: Hypertension is considered the silent killer?
True- builds gradually, people don’t realize the progression until it has progressed to crisis level hypertension
True or false: it is not important to attend yearly appointment and have blood pressure checked?
False
What are s/s of hypertension?
- Asymptomatic
- Headache *
- Visual disturbances*
- Chest pain*
- Flushed face*
- Epistaxis *
- Dizziness*
** when patients start experiencing these symptoms it likely means theyve been dealing with high BP for awhile now and prob. never knew.
What is complicated HTN??
Sustained hypertension that has effects beyond hemodynamics (organ involvement)
What are two mechanisms of tissue damage?
- Ischemia
- Edema
Why is it important to have blood flow everywhere in our body?
- because it carries oxygen. So if we have decreased blood flow we automatically have decreased oxygen.
What is ischemia?
It is when we have decreased oxygen content to a certain area
What is edema?
When fluid start to seep into the tissue from the vessels. You can also have edema of organs
What common areas “organs” does complicated HTN effect?
- Heart*
-Myocardium
-Coronary arteries. - Kidneys*
-renal disease is most often caused by untreated HTN - Brain
-Storke risk increased - Eyes
- Aorta
- Lower extremity vessels
Individuals with elevated BP are assumed to have __1__ HTN…. if they are not dx?
(primary or secondary?)
- Primary
Is a thorough history and physical assessment important for a patient with possible HTN?
Yes
What are the steps of having a patient officially dx with HTN?
- Usually dx by PCP… patient comes into PCP office for a check up and has a increased BP. The nurse will retake a few times while the patient is in the clinic… if still elevated before the patient gets ready to leave the nurse will teach the patient to take bp at home and keep log… Dr. then can use reading from office plus home log to dx patient with HTN
What dx test or lab can dx HTN?
- There is no lab/dx test that can be done to dx HTN. The patient must have several high readings + home log to be dx
What is white coat syndrome?
- Sometimes patients BP will increase simply because they are in the clinic.
We know that there are no diagnostic labs for HTN but we will have lab orders for what possible labs just to rule out other issues?
- Urine, Blood test, ECG reading
What are the treatment goals for HTN?
- Focus on systolic BP because typically diastolic usually follows
- Goal reading is 130/80 mmhg or lower
- Treat preexisting conditions (diabetes control, renal disease, heart disease)
What are some treatment options for HTN?
- Lifestyle modifications
- Diet
-DASH- Dietary approaches to stop hypertension
- rich in fiber and k+, low dietary sodium and saturated fats, includes fruits, vegetables, low in diary, low in carbs, encourage intake of fish, poultry, nuts. Limited red meats and sweats are recommended. - Exercise
- Moderate alcohol consumption.
Ace inhibitors all end in what suffix?
PRIL
Captopril
Enalapril
Benazepril
Beta-blockers all end in what suffix?
OLOL
Propranolol
Metroprolol
Atenolol
How can you remember Calcium antagonist drugs?
- Very Nice Drugs
V- Verapamil
N- Nifedipine
D- Diltiazem
Alpha-Adrenergic Antagonists are not used often as often due to what reason?
- Side effects..
What side effects can alpha-adrenergic antagonists have?
- Orthostatic hypotension
- Vertigo
- Tachycardia
- Sexual dysfunction
What are two examples of alpha-adrenergic antogonists?
- Daxazosin (cardura)
- Prazosin (minipress)
Furosemide can be used for hypertension… but what might be going on with a patient that the doctor would decide that furosemide was the best tx route?
Edema… fluid build up… causing vessels to stretch which is what causes the HTN
What is the main side effect of furosemide that we should be concerned about?
- Low potassium… dysrhythmias
Most the time a patient on furosemide will also be on what?
K+ supplement because they are unable to get enough through diet
How long does furosemide work for?
6hours
hydrochlorothiazide HCTZ is used to tx HTN… what is something we should monitor when a patient is on this med?
- Electrolytes balance
D-I-U-R-E-T-I-C is a way to remember hypertension nursing care… what does each letter stand for?
D- Daily weight
I- I & O’s - kidneys can be effected
U- Urine output
R- Response of B/P
E- Electrolytes
T-Take pulses
I- Ischemic Episodes (TIA)
C- Complications; 4C’s
-CAD- Coronary artery disease
- Chronic renal failure
- Congestive heart failure
- Cerebral vascular accident
What ensures the best success in tx of HTN?
- Compliance
What is orthostatic hypotension also known as?
Postural hypotension
What is orthostatic hypotension?
A decrease in systolic and diastolic pressure upon standing
How much does your systolic and diastolic pressure to drop for it to be considered orthostatic hypotension?
- Drop of 20mmhg or greater systolic
- Drop of 10mmhg or greater diastolic
What are some causes of acute orthostatic hypotension?
- Altered body chemistry
- drug action
- prolonged immobility
- Starvation
- Physical exhaustion
- Volume depletion
- venous pooling
Long car rides, airplane rides are examples…
what age population is at most risk for orthostatic hypotension?
- Elderly
What are some causes of chronic hypotension?
Secondary to a specific disease
1. endocrine (adrenal insuff. , diabetes)
2. Metabolic disorders
3. CNS (intracranial tumors, cerebral infarct)
4. PNS (peripheral neuropathies)
What are patients with orthostatic hypotension at most risk for?
Falls
What are s/s of orthostatic hypotension?
- Dizziness
- Blurring or loss of vision
- Syncope and fainting
- Very common postprandial (after meals) in older adults
How do you monitor orthostatic hypotension?
- Take blood pressure lying, sitting, standing… usually TID/QID
What is the dx test used to diagnose orthostatic hypotension?
Tilt table test
How do you treat orthostatic hypotension?
- Eliminate any known cause
-Adjust meds
- Give volume
-Replace electrolytes
-Assist with frequent repositioning - Assist pt. when sitting/standing
- Supportive devices (handrails, walkers)
- Fall percautions
What is the primary intervention for orthostatic hypotension?
- Fall precautions
What is preload?
The amount of myocardial stretch just before systole caused by the pressure created by the volume of blood within the ventricle (AKA left ventricular end diastolic pressure LVEDP)
What is afterload?
- The amount of resistance to ejection of blood from ventricle
What happens to afterload during HTN or vasoconstriction?
- Increased
True or false: Afterload and cardiac workload are increased during hypertension?
- True
When is preload typically increased?
- Hypervolemia
- Regurgitation of cardiac valves
What is atherosclerosis?
- Accumulation of lipid, or fatty substances in the vessel walls
Where is atherosclerosis most commonly found?
Coronary Arteries due to all the turns, nooks and crannies so its easier to get stuck
What causes atherosclerosis?
- Inflammatory response, fibrous cap atheroma formed, which leads to ischemia
Complicated lesions can have blood clots attached? True or false?
True
What are non-modifiable risk factors of CAD (atherosclerosis)?
- Age
- Gender
- Family hx
- Ethnicity
What are some modifiable risk factors of CAD (atherosclerosis)?
- High cholesterol
- Smoking
- Hypertension
- Hyperglycemia
- Obesity
- Physical inactivity
- Stress
True or false: After age 44, CAD incidence in women is equal to men?
False- After age 55
True or false CAD is the # 1 killer of men
False- Women
What is myocardial ischemia?
- Pathologic mechanisms interfere with blood flow through the coronary arteries… no enough blood flow
What are some possible causes of myocardial ischemia?
- Atherosclerosis
- Thrombus formation
- Vasoconstriction
True or false: If we have a vessel that is 50% blocked/occluded/narrowed we are at much greater risk of myocardial ischemia because we are not getting enough blood flow to meet the demands of the heart?
True
In myocardial ischemia has inadequate blood flow/oxygen content: Either has…..
- Decreased supply of blood flow/oxygen
- Increased demand for blood flow//oxygen
another words deman exceeds supply!!
In myocardial ischemia has inadequate blood flow/oxygen content: Either has…..
- Decreased supply of blood flow/oxygen (blockage)
- Increased demand for blood flow//oxygen (physical exercise, sick patient, high altitudes, vasoconstriction)
another words demand exceeds supply!!
What is angina pectoris?
- Chest pain caused by myocardial ischemia
-Insufficient coronary blood flow results in decreased oxygen supply to meet the myocardial demand for o2.
What are factors precipitating anginal pain?
- Physical exertion
- Exposure to cold
- Eating a heavy meal
- Stress or emotional situation
What is stable angina?
- Predictable pain on exertion usually only last 3-5 after exertion is stopped as long as blood flow is restored… no permanent damage.
- Relief when rested
- Nitrates are a possible tx…
What is Prinzmetal angina?
- Unpredictable, caused by vasospasm
- Occurs at rest
- Usually tx with calcium channel blockers because they help with spasms of the chest wall
What is silent ischemia?
EKG changes but no reported symptoms or pain
What is unstable (preinfarction) angina?
- Occurs at rest or during minimal activity; increasing severity or frequency… could be with excretion or at rest… doesnt go away.
- Not relieved with nitrates
20% of these cases will lead to a MI or death
True or false: Unstable angina is the type of pain we would expect to see in a person leading up to a MI?
True
What are prevention/treatment of angina
- Diet changes
- Exercise
- Medications
- Tobacco cessation
- Manage HTN
- Controlling DM
- Manage stress
What is the average workout time for healthy individuals?
- 30 mins of exercise 3-4 times a week
Evaluation of chest pain includes what?
- Physically assessment– a good cardiac assessment
- EKG
- Lab
- Physical exam
-Auscultation– may here rapid or extra heart beat- S/S
What are some s/s of angina
- Feeling of indigestion
- Chocking or heavy pressure in sternum (crushing)
- May radiate to neck, jaw, shoulder, arms, usually left arm
- Weakness or numbness in arms, wrists, and hands
- Shortness of breath, pallor, diaphoresis
- Dizziness, nausea, vomiting
Women- fatigue
Elderly- dyspnea
What are we looking for on an EKG in a patient having chest pain?
- ST depression
- ST elevation
What is ST depression an indication of?
- Ischemia - decreased o2 but not complete loss of
What is ST elevation an indication of?
- Injury or infarction-
True or false: We want to catch patients when there EKG is showing signs of ST depression so that we can fix the blood flow obstruction and prevent ST elevations?
True
True or false: You dont need a 12 lead to “dx” st elevation or depression
False- can use to see but not dx
What is acute coronary syndrome an umbrella term for?
- Unstable angina and myocardial infarction
What are some labs for acute coronary syndrome (ACS)
- CK (Creatinine Kinase) or CK-MB (Creatine Kinase Myocardial bands) CK-MB– More specific to the heart muscle. Just a CK is any muscle injury/damage.
- Myoglobin- Protein that is elevated and released with muscle damage/injury not specific to the cardiac muscle
- BNP- Peptide that is released with overstretched ventricular muscle. Used to dx and evaluate CHF
- Troponin- Most specific lab for cardiac tissue.. Most specific lab to show myocardial lab.
True or false: A patient in the ED that presents with symptoms of an MI has troponin levels checked on arrival and again in 30 mins. If the lab has increased that is a sign the patient is improving?
- False- It is a sign that they are progressing to MI
Which cholesterol level do we want high?
- HDL
True or false: Troponin can tells about our patients heart status up to 14 days prior?
True
Do you want you LDL cholesterol level high or low?
- Low
Do you want your HDL cholesterol level low or high?
- High
Do you want your triglyceride cholesterol level low or high?
- low