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7 primary risk factors for CHF?
- 1. CAD
- 2. advanced age
- 3. HTN
- 4. DM
- 5. smoking
- 6. obesity
- 7. high serum cholesterol
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Culture/Ethnic disparities in CHF & its Tx?
- 1. AA high incidence, mortality, & develops at earlier age than in whites
- 2. AA have more ACE inhibitor angioedema
- 3. Asians have extremely high risk for ACE cough
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Only medication approved specific for AA for CHF?
bidil
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Primary causes of HF?
- 1. CAD including MI--> kills tissue --> HF
- 2. HTN & hypertensive crisis --> stretches heart tissue --> HF
- 3. rhumatic heart disease
- 4. congenital heart defects
- 5. pulmonary hypertension
- 6. cardiomyopathy: potpartum, substance abuse
- 7. hyperthyroidism
- 8. valvular disorders
- 9. myocarditis
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3 primary precipitating causes of CHF?
7 others?
- 1. anemia
- 2. infection
- 3. dysrhythmias
- 1. thyrotoxicosis
- 2. hypothyroidism
- 3. bacterial endocarditis
- 4. pulmonary disease
- 5. paget's disease
- 6. nutritional deficiencies
- 7. hypervolemia
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What is hemodynamic monitoring?
What is it used for?
shows CO, SVR (vasoconstriction/dilation)
used to calculate CO, SVR, pulmonary art wdge pressure, SV, central venous pressure
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What does pulmonary artery wedge pressure show?
function of L side of heart
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Swan-Ganz?
Where is it & what does it show?
pulmonary artery catheter
sits in pulmonary artery & shows R-side pressure
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How is central venous pressure measured?
What does it show?
can measure with a central line
shows fluid status (overload or dehydration) & gives info about why BP is decreased
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Tx of decreased central venous pressure?
blood & fluids or if r/t heart not pumping can Tx with HF meds
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Preload?
volume coming back to heart
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What occurs with preload in CHF?
it is increased
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What meds are given for increased preload/CHF?
diuretics & vasodilators/BP meds
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Nursing intervention that can decrease preload in CHF pt?
dangling legs
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What AE can occur when placing central venous lines?
can go too far & hit ventricle --> arrhythmias
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How would lasix affect preload?
decrease
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How would vasodilation affect the preload?
decreases preload
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3 goals of CHF Tx?
- 1. decrease preload
- 2. decrease afterload
- 3. increase CO
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What effect does lasix have on SVR?
decreases
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Should CHF pt legs be elevated?
no - will drown them
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What is CO? What is normal CO?
volume of blood pumped by heart in one minute
normal -4-8L/min
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What is SVR? What does it indicate?
systemic vascular resistance - afterload
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What is central venous pressure?
What does central venous pressure indicate?
R atrial pressure
indicates preload
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What hemodynamic devices are used to measure R atrial pressure/CVP?
What do they also indicate?
Schwann Ganz or pulmonary wedge
fluid status, increased CVP, volume overload or R ventricular failure, decreased CVP, hypovolemia
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What is reflected by pulmonary wedge pressure?
L ventricle preload (measures pulmonary capillary pressure & R atrial pressure)
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What is indicated by an elevated PAWP?
heart failure/fluid overload
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Counterregulatory mechanisms that occur in HF?
natriuretic peptides (ANP & BNP) are released by heart muscle & promote vasodilation to reduce afterload & preload
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What will occur with systolic failure?
no forward BF, decreased EF & BP
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Causes of systolic failure?
- 1. MI
- 2. htn
- 3. cardiomyopathy
- 4. valvular heart disease
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Hallmark of systolic failure?
decreased EF
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Diastolic failure?
ventricles do not fill during diastole --> decreased SV & CO
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Swan-Ganz & pulmonary artery wedge are used to measure what?
CVP & R atrial pressure - shows functioning of the L side of the heart
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Patho of diastolic failure?
high filling pressure in ventricles r/t noncompliance/stiffness --> venous engorgement in pulmonary & systemic systems --> pulmonary congestion, pulmonary HTN, ventricular hypertrophy, and normal EF
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Cause of diastolic failure?
results from LV hypertrophy r/t chronic systemic HTN, aortic stenosis, or hypertrophic cardiomyopathy
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How does dilation of the ventricles contribute to CHF?
Why does this occur?
muscles of heart stretch to increase CO & force of contractions --> enlarged heart will start to fail
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What test can be used to distinguish CHF from lung problem?
elevated BNP indicates HF
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What will happen to BNP with Tx of CHF?
will drop
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How does hypertrophy of the ventricles contribute to heart failure?
poor contractility
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How does SNS contribute to HF?
responds to decreased CO by releasing catecholemines (EPI & NE) to increase HR & contractility & vasoconstricts (increased preload) --> strains already failing heart
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What is affected by L sided HF?
lungs
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What diuretic cannot be given to CHF pt?
Why?
mannitol - pulls fluid from tissue into BV --> will stress overworked heart r/t increased BF
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Important consideration with use of mannitol?
need IV filter
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How does the neurohormonal response contribute to fluid retention during CHF?
decreased CO --> renin/angiotensin/aldosterone release --> retention of Na/water & vasoconstriction --> increased BP --> increased stress on heart
decreased CO also causes release of ADH
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What type of CHF is usually seen first?
L sided
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Patho of L-sided HF?
LV dysfunction --> blood backs up through L atrium into pulmonary veins --> increased pulmonary pressure --> fluid from pulmonary capillary bed shifts into interstitum & alveoli --> pulmonary congestion/edema
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4 causes of L sided CHF?
CAD, HTN, cardiomyopathy, rheumatic heart disease
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What may occur as a result of L sided CHF?
R-sided HF
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How may pulmonary congestion be monitored in L sided HF?
CXR will show decreased fluid in the lungs
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R-sided failure patho?
backflow to R atrium & venous circulation --> venous congestion --> peripheral edema, hepatomegaly, splenomegaly, vascular congestion of GI, JVD
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Med that may be given to increase BP & decrease peripheral edema in R sided HF?
albumin
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5 causes of R sided HF?
- 1. L sided dysfunction
- 2. chronic pulmonary HTN/cor pulmonale
- 3. COPD
- 4. pulmonary emboli
- 5. MI
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What occurs in ADHF/acute decompensated HF?
lung alveoli filled with fluid - manifests as pulmonary edema
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12 S/S of acute decompensated HF? (ADHF)
- 1. agitation
- 2. pale
- 3. may be cyanotic
- 4. skin clammy & cold
- 5. dyspnea
- 6. RR >30
- 7. orthopnea: feel like drowning when lay flat
- 8. wheezing
- 9. frothy blood-tinged sputum
- 10. bubbling crackles
- 11. pulmonary edema
- 12. enlarged heart on CXR
- 13. paroxysmal nocturnal dyspnea
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What usually occurs with chronic CHF?
10 S/S?
- usually have biventricular failure
- 1. tachycardia
- 2. edema
- 3 nocturia
- 4. behavioral changes: r/t hypoxia
- 5. skin changes
- 6. weight changes
- 7. chest pain
- 8. fatigue
- 9. dyspnea
- 10. orthopnea: orthopnea X5 - sleep with 5 pillows
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What could be 1st s/s of CHF exacerbation?
dry hacking cough
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Why may anemia occur with HF?
poor nutrition, renal disease, or durg therapy (ACE)
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Orthopnea?
dyspnea when in supine position
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Paroxysmal nocturnal dyspnea?
pt wakes in panic with feelings of suffocation & has strong desire to sit up for relief
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L or R sided HF cause skin open with seeping fluids?
R sided
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Why may tachycardia not be evident in a pt with CHF?
if taking beta blockers
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Where may edema occur with CHF?
peripheral, lungs, liver(hepatomegaly), dependent areas, abd cavity (ascites)
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What is the cause of dyspnea with CHF?
increased pulmonary pressures
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Why does pt with CHF have nocturia?
daytime UO is decreased by decreased CO & fluid in interstitial areas
at night fluid shifts back into BF
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What skin changes occur with CHF?
- 1. dusky
- 2. cool & damp/diaphoretic
- 3. LE shiny & swollen with diminished or absent hair growth
- 4. pigment changes r/t chronic selling
- 5. brown or brawny ankles & lower legs
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What behavioral changes may occur with CHF?
Cause?
unusual behavior: restlessness, confusion, decreased att. span or memory
caused by decreased CO --> decreased BF to brain & hypoxia
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Why may chest pain occur with CHF?
decreased CO --> decreased coronary circulation
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Weight changes that occur with CHF?
may initially gain r/t fluid retention
eventually will lose weight b/c of anorexia & N: loss of muscle & fat
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Why may pt muscle & fat loss with CHF go unnoticed?
may be masked by fluid retention & edema
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5 complications of CHF?
- 1. pleural effusions
- 2. arrhythmias: high risk for fatal
- 3. L ventricular thrombus
- 4. hepatomegaly
- 5. renal failure
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What causes pleural effusion r/t CHF?
Where effusion usually seen?
increase pressure in pleural capillaries --> fluid into pleural space
in R lower lobe
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What is the cause of nearly 1/2 of sudden cardiac death in CHF?
ventricualr tachyarrhythmias
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What arrhythmias may occur with CHF?
tachyarrhythmias & afib
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2 causes of arrhythmias with CHF?
low EF increases risk
lasix & other drugs that alter K
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2 risks associated with low EF?
- 1. arrhythmias
- 2. formation of clots in L ventricle r/t blood pooling
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How may clots be prevented with CHF?
may be on heparin
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What may occur is thrombus forms in L ventricle r/t decreased EF & CHF?
can further decrease CO & can cause embolism
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When is hepatomegaly most likely to occur with CHF?
What can it lead to?
more likely with R-sided failure
can lead to liver failure & cirrhosis
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Why may renal failure occur with CHF?
decreased perfusion of the kidneys
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Acronym to remeber s/s of CHF?
- FACES
- Fatigue
- Activity limitation
- Cough
- Edema
- Shortness of breath
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How is CHF classified?
based on tolerance of physical activity
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Class I CHF?
no limitation of activity
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Class II CHF?
slight limitation of activity: no s/s at rest
ordinary activity causes fatigue, dyspnea, palpitations, or pain
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Class III CHF?
marked limitation of activity: usually comfortable at rest & some s/s with activity
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Class IV CHF?
inability to carry on anyphysical activity without discomfort
s/s of cardiac insufficiency or anigna may be present even at rest
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Dx studies for HF?
- 1. physical exam
- 2. CXR
- 3. ECG
- 4. hemodynamic assessment
- 5. echo
- 6. cardiac cath
- 7. BNP
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What may show on ECG for CHF?
may have BBB r/t enlarged heart
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2 tests that will show EF for CHF?
Which is more accurate?
echo & cardiac cath
cath more accurate
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Tx of acute decompensated HF?
- 1. high folwers
- 2. O2 by mask or BNC
- 3. BiPaP
- 4. ET & mechanical ventilation
- 5. cont ECG & pulse ox monitoring
- 6. hemodynamic monitoring
- 7. VS, UO at least q 1h
- 8. drug therapy
- 9. possible cardioversion (for afib, etc)
- 10. ultrafiltration
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Meds used for acute decompensated HF?
- 1. diuretics
- 2. ACEs, ARBs, & aldosterone inhibitors
- 3. vasodilators: nipride, nitrates, B-type natriuretic peptides, hydralazine, isosorbide dinitrate, & bidil
- 4. Beta blockers
- 5. positive inotropes: dig, beta agonists: dopamine, dobutamine; phosphodiesterase inhibitors: inocor, primacor
- 6. antidysrhtyhmic drugs
- 7. anticoagulants
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Tx goals for CHF?
- increase Co without increase work of heart
- 1. decrease intravascular volume
- 2. decrease venous return (preload)
- 3. decrease afterload
- 4. improve gas exchange
- 5. increase CO
- 6. decrease anxiety
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Med that may be given for anxiety in CHF?
morphine
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What finding can be used to distinguish b/t systolic and diastolic failure?
EF
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BNP levels correlate with what?
degree of L ventricular dysfunction
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Ultrafiltration?
remove extracellular & intravascular fluid volume
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4 core measures for heart failure?
What will occur if these are not done?
- 1. written discharge instructions or educational materials including: activity, d/c meds, follow-up, weight monitoring, & what to do if s/s worsen
- 2. L ventricular function is documented
- 3. pt EF<40% are prescribed ACE or ARB at discharge
- 4. current smokers are given smoking cessation advice
if not done: insurance won't pay
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Tx of CHF?
- 1. O2 admin
- 2.biventricular pacing or cardiac resynchronization therapy
- 3. implantable cardioverter/defibrillator with CRT
- 4. mechanical options to sustain pt: intraaortic balloon pump, ventricualr assist devices (used as bridge to transplant)
- 5. Drugs: diuretics, ACE/ARB/aldosterone inhibitors, vasodilators, beta blockers, positive ionotropes,
- 6. nutrition: low Na diet & weight mgmt
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Nursing interventions for CHF?
- 1. admin O2 & semi-fowlers & monitor ABG's & pulse ox
- 2. adequate rest to decrease O2 needs
- 3. monitor fluid status: weight, I&O
- 4. give ice chips, gum, hard candy, or popsicles for pt on fluid restrictions to decrease thirst
- 5. Teach: weight gain 2lb/day or 5lb/wk - need to call MD
- 6. Monitor electrolytes
- 7. monitor pulses & circulation to det CO
- 8. reduce anxiety to decrease SNS stimulation: benzos or morphine
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2 psych issues that are common with CHF?
anxiety & depression
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Effects of diuretics on CHF?
decrease venous return/preload, increase CO, & decrease pulmonary congestion --> increased gas exchange
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Pt teaching for CHF?
- 1. low Na diet & lifestyle
- 2.should get vaccinations against flu & pneumonia
- 3.s/s of exacerbations
- 4. s/s of drug toxicity & how to take pulse & home BP monitoring
- 5. s/s of hypokalemia & hyperkalemia
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First choice diuretics for HF?
thiazides
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3 AE of loop diuretics?
3 loop diuretic meds?
- 1. hypokalemia
- 2. ototoxicity
- 3. allergy in pt allergic to sulfa drugs
lasix, demadex, bumex
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Effects of ACE inhibitors?
- 1. decrease hypertrophy
- 2. decrease BP
- 3. increase CO
- 4. increase diuresis
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AE of ACE inhibitors/captopril?
- 1. hypotension
- 2. hyperkalemia
- 3. rebound hypertension if d/c
- 4. angioedema - can develop suddenly & may be life-threatening
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Consideration with elderly & ACE?
Who may also have this issue?
decreased renal efficiency could cause increased drug levels
may also occur in renal failure
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Aldosterone antagonist actions?
Drugs?
decrease Na & fluid retention - K sparing diuretics
spironolactone & inspra
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4 AE/considerations with aldosterone antagonists/K sparing diuretics?
- 1. hyperkalemia
- 2. can decrease dig effects if hyperkalemia occurs
- 3. Teach pt to avoid high K foods: oranges, bananas, apricots
- 4 assess male pt for gynecomastia with long-term use
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2 types of vasodilators used for CHF?
nitrates & bidil
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AE of nitrates to watch for?
decreased BP - must monitor
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Important consideration when giving IV nitrates?
adheres to plastic - must waste 50-100mL before running med
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How may nitrates be used in pt who cannot tolerate ACE or ARBs?
may take nitrate combined with hydralazine
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2 AE of nitrates?
- 1. tolerance
- 2. ED - ED meds are CI
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Bidil?
Use?
Actions?
combo of isosorbide dinitrate & hydralazine
for AA already being Tx with standard therapy
isosorbide - relaxes vessels & releases nitric oxide
hydralazine - relaxes arteries & decreases work of heart
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Action of beta blockers?
block SNS stimulation on failing heart
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2 reasons a pt with HF may have cough?
may be r/t HF or ACE inhibitor
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Major AE of beta blockers?
- 1. edema
- 2. worsening HF
- 3. hypotension
- 4. fatigue
- 5. bradycardia
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S/S of beta blocker OD?
extreme hypotension & bradycardia, bronchospasm, & cardiogenic shock
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How to assess tolerance of beta blocker?
assess standing BP 1h after dose
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3 AE that may occur with abrupt w/d of beta blockers?
sweating, palpitations, & HA
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S/S of dig toxicity?
- GI: anorexia, NV
- Visual: blurred vision, yellow tinge, visual halos around dark objects
- CNS: fatigue, drowsiness, HA, depression
- CV: dysrhythmias, bradycardia, tachycardia, apical-radial pulse deficit, HF
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What dysrhythmias may occur with dig toxicity?
afib, PVC, Vfib, heart block
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Most common cause of dig toxicity?
K wasting diuretics & hypokalemia
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What pt have increased risk for dig toxicity?
elderly, renal & liver dysfunction
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What is the Tx of dig toxicity?
withhold the med and/or digibind
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When may fluid restrictions be implemented for CHF?
moderate to severe HF & renal insufficiency
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Pt postion that can decrease venous return?
Effects?
high flowlers with feet dangling or horizontal - pools blood in extremeities & improves ventilation
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Consideration if giving beta blocker with CHF?
should check CO & CHF exacerbation before giving beta blocker: any s/s of exacerbation or decreased CO --> should hold beta blocker
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Why is it important to monitor BP in CHF pt?
if give too many BP meds and BP gets too low it cannot be increased with fluids
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Med to decrease afterload?
Effect?
Monitoring?
nipride decreases afterload & preload
potent vasodilator
need to monitor BP
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Consideration when giving nipride IV?
put in paper bag- light sensitive
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2 effects of ACE inhibitors?
What med may be given with ACE inhibitors & why?
decrease afterload & SVR
may be given with thiazide diuretic b/c ACE holds K & thiazides get rid of it
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2 EX of ARBs?
cozaar & diovan
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What meds should be held during exacerbation of CHF?
beta blockers - will decrease CO too much
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Interventions to improve gas exchange?
- 1. morphine - decreases O2 demand
- 2. sats decreased may need mask or nonrebreather
- 3. severe pulm edma may need vent
- 4. monitor ABG, pulse ox,
- 5. rest
- 6. may use BiPaP to deliver O2
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Drug of choice for pt in pulmonary edema?
nipride
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Interventions to improve cardiac function?
- 1. dig
- 2. dobutrex, inocor, primacor, natrecor - peripheral vasodilation
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AE of meds that cause vasodilation in CHF?
dobutrex, inocor, primacor, natrecor
can die if stop taking these meds abruptly: when d/c must monitor for CHF exacerbation
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Nursing care for chronic CHF?
- 1. ID underlying cause: HTN, valvular defects, etc
- 2. ventricular tachyarrhythmias - implantable cardioverter (ICD)
- 3. Swan-Ganz
- 4. intra-aortic balloon pumps (IABP) - balloon inflates during diastole so heart doesn't have to pump as hard to pump blood out during systole
- 5. ventricular assist devices (VAD) - longer-term support to wait for heart transplant
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Does pt with VAD have a pulse?
may or may not have pulse
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Complication of IABP?
- 1. if balloon moves can block aorta & BF to areas of body
- 2. dislodging plaque
- 3. aortic dissection
- 4. thrombocytopenia
- 5. infection
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Complication of VAD?
sepsis & death
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Major AE of nipride?
Therapeutic use?
hypotension - monitor BP, cyanide poisoning after 48h
need to keep MAP>60
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Monitoring of IABP?
pulses, UO, bowel sounds (ischemia & embolism)
CV checks, neuro, & hemodynamic assessments q15-60 minutes
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Nursing care after IABP?
- 1. relatively immobile in sidelying or supine positions with HOB elevated <45 degrees
- 2. sedation, pain relief, skin care & comfort measures
- 3. weaning pt off of IABP
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IABP causes increased risk for ___ & ____ especially.
clots & sepsis
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Action of VAD?
augment or replace ventricular action when heart is failing and needs to recover or when waiting for transplant
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Nutritional therapy for CHF?
- 1. low Na diet: mild CHF <2g, severe <500-1000mg
- 2. fluid restrictions with no more than 2L/day
- 3. daily weight before breakfast: gain of 3lb in 2 days or 3-5lb in a week: need to call
- 4. no alcohol- cardiotoxic
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Ejection fraction?
normal?
percentage of total ventricular volume ejected during each contraction
normal is >55% & usually is 65%
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Aquadex?
pulls off fluid but doesn't affect electrolytes
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