Cardiac: HF and ACS Flashcards
Define heart failure
inability of the heart to pump sufficient blood to meet needs of tissues for oxygen and nutrients
What is HF characterized by?
fluid overload or inadequate tissue perfusion
What type of heart failure does this describe? (systolic/diastolic): more common, characterized by weakened heart muscle, EF is reduced
systolic
What type of heart failure does this describe? (systolic/diastolic): characterized by stiff and noncompliant heart muscle = difficulty filling ventricle, EF is normal
diastolic
What are risk factors for HF? (8)
ischemic heart disease
hypertension
diabetes mellitus
metabolic syndrome
hyperlipidemia
smoking
coronary artery disease (CAD)
myocardial infarction (MI)
Define forward failure effects in HF
Forward failure = insufficient cardiac pumping manifested by poor CO
Define backward failure effects in HF
Backward failure = congestion of blood behind the pumping chamber
what is the main symptom of left sided HF?
pulmonary congestion
increased systemic vascular resistance
What are some other S&S of left sided HF? (9)
Dyspnea
cough
fatigue
crackles
low O2 sat
orthopnea
frothy sputum
oliguria
tachycardia
What are some of the main S&S of right sided HF?
jugular vein distention
increased hydrostatic pressure
fluid retention
peripheral/dependent edema
What are some of the manifestations of fluid retention and edema in R sided HF? (6)
peripheral/dependent edema: when standing or sitting
increased JVD
Hepatomegaly (enlargement of liver)
Anorexia & GI discomfort (nausea)
Pleural effusion (fluid in pleural space)
Ascites (fluid in peritoneal cavity)
What is the key diagnostic indicator for HF?
Brain natriuretic peptide (BNP):
- high = high cardiac filling pressure
What diagnostics are included in HF? (3 main)
- Brain natriuretic peptide (BNP) - high
- Ejection fraction (EF) = low
- echocardiogram
- other: electrocardiogram (ECG), labs (electrolytes, blood urea nitrogen (BUN), creatinine, thyroid stimulating hormone, CBC, urinalysis
What does echocardiogram do?
echocardiogram uses ultrasound to check for anomalies in the heart’s structure
identify underlying cause and determines EF (for type and severity of HF)
What are some nursing interventions for pulmonary edema? (6)
Oxygen
Sitting up /sleeping with extra pillows
Avoid cold or extreme heat
Balance between exercise & rest
Reduce fluid & sodium intake
Pharmacology (diuretics)
What are some nursing interventions for peripheral edema? (4)
Skin care
Elevate extremities
Reduce sodium & fluid intake (Replace with ice chips etc)
Balance between rest & exercise
What are some medications used for HF? (7)
ACE-Inhibitors
Beta-Blockers
calcium channel blockers
Angiotensin Receptor Blockers
Diuretics
Cardiac Glycosides (digoxin)
Phosphodiesterase Inhibitors
What is the action of angiotensin-converting Enzyme inhibitors (ACE-inhibitors)?
Promote vasodilation and diuresis by decreasing afterload and prelaod
Reduces BP and kidneys excrete sodium and fluid (diuresis) = decreased O2 demand
What are some contraindications for ACE-I?
hypotension, hyponatremia, hypovolemic, hyperkalemic
What are some side effects from ACE-I? (5)
dry persistent cough
hypotension
renal insufficiency (MONITOR serum creatinine, serum electrolytes, blood urea nitrogen)
angioedema (swelling of the deeper layers of the skin)caused by a build-up of fluid - usually in eyes, lips, genitals)
hyperkalemia
What are some things to monitor with ACE-I? (6)
BP, urine output, serum sodium, potassium, creatinine, COUGH
What is an example of ACE-I?
Lisinopril (“prils”)
What is the action of angiotensin II receptor blockers (ARB)?
Decrease activation of angiotensin II = decrease BP and systemic vascular resistance and improve CO
What is an example of ARBs?
Valsartan (“sartan”)
What is the action of beta-adrengeric blockers/antagonists?
Blocking beta-adrenergic sympathetic stimulation to the heart
Reduces heart rate, slows conduction of impulses, decreases BP, reduces myocardial contractility to balance myocardial oxygen demands and oxygen supply = helps control chest pain and delays onset of ischemia during exercise
Reduce incidence of recurrent angina, infarction, and cardiac mortality
What are some side effects of beta blockers? (9)
dizziness
hypotension
bradycardia
advanced atrioventricular block
decompensated heart failure
depression
fatigue
decreased libido
masks symptoms of hypoglycemia
When are beta blockers contraindicated?
Contradicted in patients with pulmonary obstructive diseases (ex. Asthma): Can affect beta-adrenergic receptors = bronchoconstriction
What is an important assessment to take before administration of beta blockers?
take apical pulse prior to administration. If heart rate is less than 50 bpm or if arrhythmias occur, hold medication and notify health care provider
T or F: you can stop taking beta blockers at any time
False: discontinue gradually, can worsen angina or MI may develop
What is an example of a beta blocker?
Carvedilol (Coreg) and metoprolol (lopressor, toprol) (“lol”)
What is the action of calcium channel blockers (CCB) in HF?
Decrease sinoatrial node automaticity and atrioventricular node conduction = Slower heart rate and decrease in strength of heart muscle contraction = decrease workload
Relax blood vessels = decrease in BP and increase in coronary artery perfusion (decrease afterload)
Prevent and treat vasospasm