Heart Failure Flashcards
2/3 of the heart’s mass lies to the ____ of the sternum. The upper base is beneath the ____ rib
2/3 of the heart’s mass lies to the left of the sternum. The upper base is beneath the 2nd rib
Apex is located at the
5th Intercostal space, midpoint to the clavicle
Right Atrium receives systemic venous blood via
the superior vena cava, inferior vena cava, and coronary sinus
Left Atrium receives oxygen rich blood from the
pulmonary circulation via the Pulmonary Veins
These contract as a single unit
cardiac muscles
Simultaneous contraction due to depolarizing at the same time
cardiac muscles
Heart’s ability to pump =
cardiac output (CO)
cardiac output (CO) is
the amount of blood pumped in one minute.
CO is determined by
measuring the heart rate (HR) and multiplying it by the stroke volume (SV)
The amount of blood pumped out of the ventricle with each contraction
The stroke volume (SV)
The amount of myocardial stretch just before systole caused by the pressure created by the volume of blood within the ventricle.
Preload
The amount of resistance to the ejection of blood from the ventricle
Afterload
Refers to the force of contraction
Contractility
High afterload =
high cardiac workload
The inability of the heart to pump sufficient blood to meet the oxygen and nutrient needs of the tissues and organs in the body.
congestive heart failure (CHF)
Disorders which produce a reduction in myocardial contractility
Volume Overload
Pressure Overload
Loss of muscles
Restricted filling
What Are The Symptoms of Heart Failure?
FACES
FACES
Fatigue
Activities limited
Chest congestion
Edema or ankle swelling
Shortness of breath
Clinical Manifestations Left-sided failure:
Pulmonary congestion
Dyspnea, cough
Pulmonary Crackles
Low O2 Saturation
Paroxysmal Nocturnal Dyspnea
Clinical Manifestations Right-sided failure:
Congestion of viscera & peripheral tissues
Edema of lower extremities
Hepatomegaly
Distended jugular veins
Ascites
Weakness
Anorexia & Nausea
Weight Gain
The left ventricle can’t contract vigorously, indicating a pumping problem.
Systolic Heart Failure
The left ventricle can’t relax or fill fully, indicating a filling problem. Heart failure with preserved ejection fraction
Diastolic Heart Failure
Test done to confirm the diagnosis, identify underlying cause, and determine ejection fraction (EF)
Echocardiogram
Normal EF=
55%-65% of ventricular volume
Multigated Analysis Scan
MUGA Scan
Test that evaluates that function of the right and left ventricles of the heart.
Nuclear Stress Test
Provides a more accurate representation of cardiac ejection fraction.
MUGA Scan
Advantages of a MUGA Scan:
More accurate than Echocardiogram
More accurate than Angiogram
Non-invasive
Less expensive (than angio)
NYHA Functional classification, Level of clinical impairment:
No limitation of physical activity. Ordinary physical activity does not cause undue fatigue, palpitation, dyspnea (shortness of breath).
Class I
NYHA Functional classification, Level of clinical impairment:
Slight limitation of physical activity. Comfortable at rest. Ordinary physical activity results in fatigue, palpitation, dyspnea (shortness of breath).
Class II
NYHA Functional classification, Level of clinical impairment:
Marked limitation of physical activity. Comfortable at rest. Less than ordinary activity causes fatigue, palpitation, or dyspnea.
Class III
NYHA Functional classification, Level of clinical impairment:
Unable to carry on any physical activity without discomfort. Symptoms of heart failure at rest. If any physical activity is undertaken, discomfort increases.
Class IV
Neurohormone secreted from ventricles in response to pressure changes
B-Type Natriuretic Peptide (BNP)
Elevated BNP levels are associated with
elevated ventricular filling pressures- (HF worsens)
BNP below 100pg/ml=
no heart failure
BNP of 100-300pg/ml
suggestive of heart failure
BNP above 300pg/ml=
mild heart failure
BNP above 600pg/ml=
moderate heart failure
BNP above 900pg/ml=
severe heart failure
I & O’s nursing implications
shows how the kidneys are working or if diuretic is working
Types of referrals for people with CHF
Dietitians, home care, social worker, PT
Activity intolerance:
For acute exacerbations
Bed rest
Activity intolerance:
Wait 2 hours after eating before
doing physical activity
Activity intolerance:
Positioning
elevation of HOB to facilitate breathing and rest, support of arms
Type of meds that control volume
diuretics
Type of meds that slow progression of disease
ACE inhibitors and beta blockers
Number 1 treatment given for HF
diuretics
How do beta blockers work?
they help reduce BP, afterload, and HR
Treating underlying causes ….
slows progression of the disease, i.e. treating hypertension
Medication type that reduces fluid
diuretics
Medication that dilates blood vessels
ACE inhibitor and vasodilators
Medication type that also treats angina
Calcium channel blockers
Medication type that decreases BP by inhibiting calcium ions and slows cardiac impulse
Calcium channel blockers
Medication type that slows heart rate
Beta blockers
Medication type that needs the apical HR to be checked prior to administering
Beta blockers
Medication type that is dosed in mcg
Digoxin
Medication type that increases the heart’s ability to contract (helps with force of contractions)
Digoxin
Medication type that dilates coronary arteries for more oxygen and nutrients
Vasodilators
Medication type that helps reduce angina and MI
Vasodilators
Medication type that is 1st prescribed after diuretics
ACE inhibitors
Medication type, also prescribed to treat hypertension, that reduces pre and after load
ACE inhibitors
Medication type that is cardio tonic, inotropic, and blocks phosphodiesterase causing stronger contraction
Phosphodiesterase inhibitors
Medication names:
Diuretics
HCTZ (Thiazide)
Furosemide (Loop)
Spironolactone
Medication names:
ACE inhibitors
The “-prils”
Enalapril
Lisinopril
Captopril
Medication names:
Calcium Channel Blockers
Amlodipine
Diltiazem
Medication names:
Cardiac glycosides
Digoxin
Medication names:
Beta blockers
Toprol
Lopressor
Medication names:
Vasodilators
Nitrates
Medication names:
Phosphodiesterase inhibitors
IN amrinone
Medication class:
Decrease in volume
Decrease in venous return
Reduction in BP
Reduce after load & preload
Reduces myocardial work load
Diuretics
Thiazide med name:
Hydrochlorothiazide (HDTZ)
Med that acts on Distal convoluted tubules
Thiazide diuretic
Med that is Indicated for edema of CHF, liver & kidney diseases, HTN
Thiazide diuretic
Medication Adverse Effects:
GI upset
CNS complications (lethargy, sedation, fatigue)
Hypovolemia, Hypokalemia (assess K+)
↑levels of Ca & uric acid (gout)
Thiazide diuretic
Med with Drug to drug interaction:
↑ risk of Digoxin &Lithium Toxicity especially with hypokalemia
↓effectiveness of oral antidiabetics
Thiazide diuretic
Med that acts on the Loop of Henle
Loop diuretics
Med that is indicated for Acute CHF, Acute Pulmonary Edema, liver & kidney diseases, HTN
Loop diuretics
Adverse effects of loop diuretics
Hypokalemia
Volume depletion (↓BP??)
Hyperglycemia (with diabetics)
Ototoxicity (???)
Contraindications for loop diuretics
Allergy, Electrolyte depletion, anuria/renal failure, hepatic coma,pregnancy & lactation
How to avoid ototoxicity with loop diuretics
IV push slowly
Drug to drug interactions for loop diuretics
↑ risk of ototoxicity with Aminoglycosides/Cisplatin. ↑ anticoagulation effect with anticoagulants ,decreased effect when used with NSAIDs.
aminoglycosides
antibiotics (gentamycin)
Med that acts on distal tubule & collecting duct
potassium sparing diuretics
Indications for potassium sparing diuretics
edema in CHF, hypokalemia, liver & kidney diseases, HTN, hyperaldosteronism
Drug to drug interaction with potassium sparing diuretics:
↓ diuretic effect when used with salicylates (aspirin and Pepto bismol)
Name of an ACE inhibitor
benazepril
Major side effect of ACE inhibitors
angioedema
Ace inhibitors decrease…
preload & afterload
Med that blocks the enzyme which converts Angiotensin I to II → prevention of vasoconstriction & release of aldosterone
ACE inhibitors
Vasodilators of choice in treating HF
ACE inhibitors
Many times swelling SE shows in the
lips and face, and can constrict the airway
Angioedema is more common in what population?
African American men
What vital must me assessed before giving cardiac glycosides?
HR
Overall effect of cardiac glycosides:
↓ in myocardial workload & relief of CHF.
Cardiac glycosides onset of action is…
rapid
Negative chronotropic effect
Slows HR
Cardiac glycosides are safe for patients with
liver dysfunction
Cardiac glycosides are excreted in urine & can cause
toxicity in renal diseases
What must be monitored when giving cardiac glycosides?
Serum potassium
Signs and symptoms of digoxin toxicity
Nausea, anorexia, confusion, visual disturbance (halos), and bradycardia
IHSS
Idiopathic hypertrophic subaortic stenosis (a genetic condition)
Contraindication for cardiac glycosides:
allergy, lethal ventricular arrhythmias, IHSS, acute MI, renal insufficiency
Treating CHF acronym
UNLOAD FAST
UNLOAD FAST
Upright position
Nitrates
Lasix
Oxygen
ACE inhibitors
Digoxin
Fluids decrease
Afterload decrease
Sodium restriction
Test
A, B, C, D, E’s of Heart Failure Therapy
A. Angiotensin converting enzyme inhibitors, anticoagulants
B. Beta blocking drugs
C. Calcium channel blocking drugs
D. Diet, diuretics, digitalis, dobutamine
E. Exercise
Acute event that results from HF
Pulmonary Edema
Abnormal accumulation of fluid in the interstitial spaces or the alveoli
Pulmonary Edema
Clinical manifestations of Pulmonary edema
Increasing restlessness & anxiety from hypoxia
Breathlessness
Extremities become cold & moist
Nail beds become cyanotic
Distended Neck Veins
Management of Acute Pulmonary Edema
Improve ventricular function and increase respiratory exchange
O2
Medication therapies
Nursing support
Med that ↓anxiety & preload in PE
Morphine