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CHF/HF
All types of heart failure
65
Nursing
Undergraduate 1
11/01/2010

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Cards

Term

Significance

Definition
1. 5 million in U.S; due in part to improved survival after cardiovascular events and in part to increased aging population. 470,000 new cases each year
Term
Causes
Definition
Syndrome – caused by hypertension or respiratory hypertension
Term
Risk factors
Definition

1.CAD & Age

2. Diabetes

3. Smoking

4. Obesity

5. High serum cholesterol

Term
Risk increases with...
Definition
...Severity of hypertension; either both, or systolic or diastolic. Each give a different beginning of HF but all roads lead to total failure
Term
Risk for HF after bypass surgery...
Definition
...usually 10-20 years after bypass.
Term
Acute Causes
Definition

1. Acute MI

2. Dysrhythmias

3. PE

4. Thyrotoxicosis

5. Hypertensive crisis

6. Rupture of papillary muscle IE mitral valve

7. Ventricular septal defects

8. Myocarditis

Term
Chronic Causes
Definition

1. CAD

2. Hypertension

3. Rheumatic heart disease

4. Congenital heart disease

5. Cor Pulmonale

6. Cardiomyopathy

7. Anemia

8. Bacterial endocarditis

9. Valvular disorders

Term
Barney style ->  HF = Inefficient pump
Definition

..Due to

1. Sudden change in heart's ability to pump

2. Secondary to chronic condition

3. Primarily is the ventricles

Term
Short Patho of HF
Definition

1. Cannot meet body's metabolic needs; demand excced supply

2. Unable to remove waste products

3. Double pump, one side or the other may fail

Term
Patho of Ventricular Failure - Systolic
Definition
Most common cause of HF; results from inability to pump blood; usually from defect in ventricle contraction; HALLMARK of systolic dysfunction is decrease in the left ventricluar ejection fraction
Term
Cause of Systolic Failure -
Definition

Impaired contractile function IE MI

mechanical abnromalities IE valve disease

increased after-load - HTN

Term
Systolic HF
Definition
usually left sided, myofibrils cannot shorten or contract
Term
Systolic HF Results in
Definition

Decreased ejection fraction

increased LVED and PAWP (pre-load and afterload)

Term
Diastolic Failure -
Definition
impaired ability of ventricles to relax and fill during diastole; normal ejection fraction and systolic function;
Term
Diastolic Failure - leads to
Definition
decreased filling of the ventricles resulting in decreased stroke volume and CO.
Term
Diastolic Failure characterized
Definition
by high filling rpessures due to still noncompliant ventricles; results in venous pooling in pulomnary and systemic vascular systems
Term
Diastolic Failure - Diagnosis
Definition

1. presence of pulmonary congestion

2. pulmonary HTN

3. ventricular hypertrophy

4. normal ejection fraction

Term
Diastolic Failure result of...
Definition

left ventricular hypertrophy from

1. HTN

2. Aortic stenosis

3. hypertrophic cardiomyopathy

Term
S/S of Left side HF
Definition

1. orthopnea

2. PND

3. Cough-hemoptysis

4. dyspnea on exertion

5. rapid/irregular pulse

6. anxiety

7. dyspnea

8. elevated BP

9. S3/S4 sounds

10. Shallow respirations-32-40

11. decreased urine output

12. restlessness

13. confusion

Term
S/S of Right Sided HF
Definition

1. Gradual weight gain

2. Dependent edema

3. Ascites

4. Hepatomegaly

5. JVD

6. Nausea

7. Fatigue

8. Anorexia

9. GI bloating

Term
Left Ventricular failure is usually...
Definition
first, then causes RIGHT SIDED FAILURE
Term
Left ventricular failure short patho
Definition

1. Fluid accumulates and creates pulmonary congestion

2. Fluid escapes into alveoli

3. Impairs gas exchange

Term
Right sided failure - patho
Definition
causes backup of blood into the right atrium and venous circulation
Term
Right sided failure - patho
Definition

can cause

JVD

hepatomegaly

splenomegaly

vascular congestion of GI tract

peripheral edema

Term
Primary cause of right side failure is left side failure due to...
Definition
pulmonary congestion and increased pressure in the blood vessels of the lung (pulmonary HTN); Cor pulmonale may cause also tho this is usually a late result of pulmonary HTN
Term
Diagnostic tests for HF
Definition

1. CXR

2. ECG - shows ejection fraction

3. ABGs - bad labs are in left side failure

4. Increased Na+ and BUN

5. Decreased CO

6. ECG

7. Lung scan/pulmonary arteriography - right side failure

8. Liver enzymes - hepatomegaly the enzymes increase

9. Thyroid function tests

9. CBCs

10. Stress -testing

11. Cardiac catheterization - PAWP/LVED

Term
Compensatory mechanisms
Definition

SNS

Ventricular Dilation

Hypertrophy

Hormonal Release

 

Term
Compensation - SNS
Definition
least effective system
Term
Compensation - SNS
Definition
increased SNS activation due to lower stroke volume and CO; makes more epinephrine and norepinephrine which increase HR, contractility and constriction to increase CO.
Term
Compensation - SNS
Definition
the reaction increases heart's need for 02 and workload of already failing heart
Term
Compensation - Neurohormonal response
Definition
juxtaglomerular apparatus in kidneys sense drop in blood flow - releases Renin
Term
Compensation - Neurohormonal - RAAS
Definition
Rennin converts angiotensiongen which converts angiotensin II which triggers adrenal cortex release of aldosterone which triggers posterior pituitary secretion of ADH
Term
Compensation - Neurohormonal  - ADH
Definition
retains water and Na+, which increases BP/volume
Term
Compensation - Neurohormonal  - Effects
Definition
increases workload for already failing heart, leads to increased ventricular mass, changes in ventricular shape, and impaired contractility.
Term
Ventricular Dilation -
Definition
enlargement of the chambers of the heart
Term
Ventricular dilation
Definition
occurs when pressure in the heart chambers, usually the left ventricle, is elevated over time; the fibers stretch in response to the pressure at the end of diastole
Term
Ventricular dilation - Frank-Starling Law
Definition
the degree of stretch related to the force of the contraction/systole
Term
Ventricular dilation - Initially
Definition
the increased contraction leads to increased CO and maintenance of arterial BP and perfusion
Term
Ventricular dilation - eventually
Definition
this mechanism becomes inadequate because the fibers are overstretched and cant contract effectively
Term
Ventricular hypertrophy
Definition
the increase in muscle mass and cardiac wall thickness due to overwork and strain
Term
Ventricular hypertrophy - follows/initally...
Definition
... persistent or chronic dilation and further increases the contractile power of muscle fibers
Term
Ventricular hypertrophy eventually..
Definition
has poor contractility requiring more 02 to work, has poor artery circulation (becoming easily ischemic) and prone to ventricular dysrhythmias
Term
Complications of CHF
Definition

1. pleural effusion

2. dysrhythmias - due to electrical fiber stretch from hypertophy

3. left ventricular thrombus

4. hepatomegaly

Term
Nursing care management-chf/decompensated HF
Improve Left Ventricle Function By -
Definition

Decreasing intravascular volume; use diuretics to reduce venous return - decreases preload

 

Term
Nursing care management-chf/decompensated HF
Improve Left Ventricle Function By -
Definition
Decreasing venous return - put pt in high Folwer's. Helps with ventilation
Term
Nursing care management-chf/decompensated HF
Improve Left Ventricle Function By -
Definition
Decrease after-load (the resistance agains the LV) 
Term
Nursing care management-chf/decompensated HF
Improve Left Ventricle Function By -
Definition
Improve gas exchange and oxygenation - admin of 02 or ventilator support or intubation
Term
Nursing care management-chf/decompensated HF
Improve Left Ventricle Function By -
Definition
reducing anxiety - using sedatives, later determining the cause of the HF or PE for futher treatment
Term

Drugs to manage CHF/decompensated HF

Diuretics

Definition

1. Loop - Lasix, Bumetanide - decreases volume, admin by IV and kidney action rapidly. Associated with increased risk of fatal dysrhythmias, renal dysfunction, enhanced RAAS and SNS activation.

Overall, they actually increase systemic resistance(afterload), decrease preload and cause F/E imbalances

 

Term

Drugs to manage CHF/decompensated HF

Vasodilator

Definition

1. IV Nitro - helps decrease preload increasing the heart 02 supply

When titrating IV nitro, BP is monitored frequently (every 5-10 minutes) to avoid symptomatic hypotension

2. IV sodium nitroprusside (Nipride) - reduces pre-and after-load; DRUG OF CHOICE for ADHF and PE.

When titrating IV Nipride, BP is monitored frequently (every 5-10 minutes) to avoid symptomatic hypotension

3. Morphine sulfate - reduces pre/after-load; used in treating ADHF and PE. Dilates both pulmonary and systemic blood vessels

4. Nesiritide (Natrecor) - IV therapy for ADHF - causes both arterial/venous dilation; reduces PAWP and increases CO without increasing 02 consumption or dysrhythmias and increases renal perfusion

Term

Drugs to manage CHF/decompensated HF

Positive Inotrope

Definition

1. Digitalis Glycosides - improves LC function by increasing contractility and increases 02 consumption; requires a loading dose and time to work, not recommended for inital treatment

2. Beta adrenergic agonist  - Dopamine (Intropin), Dobutamine (Dobuterx), Epinephrine, Norepinephrine (Levophed)  short term treatment in ICU/stepdown; can cause tolerance, ventricular irritablity and heart 02 consumption

Term
Digitalis Toxicity
Definition

S/S

- visual disturbances IE yellow vision

- dysrhythmias - late sign of toxicity

-hypokalemia - caused by diuretics, biggest cause of toxicity

 

Term
Digitalis inhibitors
Definition

Hyperkalemia

 

Term
Digitalis F/E imbances
Definition
Hypercalcemia and hypomagnesaemia
Term
Digitalis Antidote
Definition
Digibind
Term

ACE inhibitor

action/use

Definition

vasodilators; FIRST LINE THERAPY IN CHRONIC HF; used in both systolic/diastolic HF; tissue perfusion maintained due to increased CO, diuresis improved by suppresion of Aldosterone; decreases PAP, right and left artieral and ventrical pressure;

 

Term

ACE inhibitor

side effects

Definition

hypotension

hacking cough

allergic reaction - facial edema

renal insufficiency

Term

ACE inhibitor

Names

Definition

-PRILS

Captopril - Capoten

Benaepril - Lotensin

Enalapril - Vasotec

Term

Anti-coagulants

Use

Definition
decrease the viscosity of the blood
Term

Anti-coagulants

Side effects

Definition

Anemia

Bleeding

Hypovolemia

Term

Bronchodilators

uses

Definition
increases the airflow in fluid filled lungs (LSHF)
Term
Nutrition - Diets
Definition

DASH

2-4g Sodium diet ; milk, cheese, bread, cereal, canned soups and canned veggies restricted

Term
Nutrition - Fluid restrictions
Definition
Not commonly prescribed for pt with mild/moderate HF; with renal insufficiency AND moderate/severe HF only.
Term
Nutrition - weight - when do we weigh?
Definition
IN THE MORNING, STUPID!!!
Term
Nursing Dx
Definition

1. Activity intolerance

2. Excess fluid volume

3. Impaired gas exchange

4. Anxiety

5. Deficient knowledge

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