Heart failure Flashcards
Frank starling
More blood (EDV) = more stretching (more preload) = greater contraction (more SV)
Describes the relationship between preload & cardiac performance
Normal systolic contractile performance (SV or CO) is proportional to preload within the normal physiologic range
Contractility is reasonably reflected by EF (percentage of end diastolic volume ejected with each contraction (SV)
Cardiac reserve is the
ability of the heart to increase its performance above resting levels in response to stress or need for increase oxygen consumption
cardiac reserve does what? (think sympathetic) and helps with what in HF?
Increase in HR
Increase in systolic /diastolic volumes
Increase in tissue extraction of oxygen
This compensatory mechanism helps with decreased blood flow in HF
Heart failure - is it the ventricles or the atria?
A clinical syndrome resulting from structural or functional cardiac disorders that impair the ability of the ventricles to fill or eject blood It is a syndrome of ventricular dysfunction.
Left ventricle fails and causes what symptoms? (just 2) (Levi - the one you forget)
shortness of breath and fatigue
Right ventricle fails and causes
peripheral and abdominal fluid accumulations
HF is a clinical syndrome characterized by signs and symptoms of (HF is fluid)
fluid overload or inadequate tissue perfusion.
HF is a complication that results from problems such as (brad, tjan, and val cause HF)
cardiomyopathy, valvular heart disease, endocarditis
HF - gender (HF does not discriminate)
equal between men and women
HF more common at what age? (same as always)
among 65 +, overweight, and african american
death from HF is dropping, but
readmissions are high
The term heart failure indicates myocardial disease, in which there is a problem with the
contraction of the heart (systolic failure) or filling of the heart (diastolic failure)
HF - permanent or reversible?
Some cases are reversible depending on the cause
HF develops fast or slow?
Develops slowly and gradually, as the heart loses the ability to work and pump blood efficiently, d/t a change in normal mechanisms of circulation and cardiac output
Most HF is a chronic,
progressive condition managed with lifestyle changes and medications
In the past, HF was often referred to as
congestive heart failure (CHF), because many patients experience pulmonary or peripheral congestion with edema.
HF - Heart does not provide tissues with adequate
blood for metabolic needs
HF - elevation of pulmonary or systemic venous pressures may result in (pressure on the freeway turns into congestion)
organ congestion
HF Causes abnormalities in systolic or diastolic?
one or the other or both
Structural defects can also cause HF - ex - and what about thyroid?
Congenital defects, valvular disorders, rhythm abnormalities, high metabolic demands (thyrotoxicosis)
HF - collagen
thickens
types of HF
Heart failure with reduced ejection fraction (HFrEF) or systolic HF
Heart failure with preserved ejection fraction (HFpEF) or diastolic HF
Left ventricular failure
Right ventricular failure
what determines HF? (HF is just CO and EF)
Cardiac output
Ejection fraction
HF factors
Factors
HR, SV, preload, afterload, contractility
HF Key
Recognize and assist compensation (BNP and RAAS system)
HF goal
Restore C.O. and gas exchange
HF is determined by just one thing - what is it?
ejection fraction, the percentage
HFrEF (HF with reduced ejection fraction) - caused by what? (the lefties reducies)
Caused by global LV systolic dysfunction
LV contracts poorly, empties inadequately
HFpEF (HF with preserved ejection fraction) (preserve is not preserving the filling)
LV filling is impaired (not necessarily the contraction part)
HFpEF - causes (wizard door)
Age related changes, diabetes, obesity, CKD and/ or causes of systemic inflammation
HFpEF goals - (preserve my BP and DM)
BP control
DM management
LV failure (what about lymph nodes)
Due to LV dysfunction
CO decreases and pulmonary venous pressure increases
When pulmonary capillary pressure exceeds oncotic pressure of plasma proteins, fluid leaks from capillaries to interstitial space and alveoli
Pulmonary compliance is decreased, and work of breathing is increased
Lymphatic drainage increases to compensate but cannot meet demands
Pulmonary edema occurs
Pulmonary effusions develop leading to more dyspnea
MV increases (PaCo2 decreases, pH increases leading to respiratory alkalosis)
Interstitial edema worsens and interferes with ventilation and leads to increase CO2 and respiratory failure
RV failure - what about aldosterone? And anemia? (Alden has anemia in the RV)
Systemic venous pressure increases
Fluid leaks and causes edema (dependent)
Feet, ankles, abdominal viscera
Organs most affected are the liver, stomach, intestines, peritoneal cavity (ascites)
Causes hepatic dysfunction (increase bilirubin, PT, alkaline phosphatase, GGT) and the damaged liver breaks down less aldosterone which then leads to more fluid accumulation
Anorexia, malabsorption, hypoalbunemia, diarrhea, anemia (chronic GI blood loss), ischemic bowel
HF - hemodynamics - Effects of decreased CO (and what about potassium?)
lower BP, decreased oxygen delivery, parasympathetic tone (arterial baroreceptors), renal perfusion, coronary perfusion, potassium excretion
HF - renal system (what happens to sodium and water?) think edema
Renal venous congestion, decreased renal blood flow, filtration and reabsorption and GFR leading to sodium and water retention (RAAS, ADH)
HF - neurohormonal - TNF?
Maintain a normal balance between vasoconstriction, stimulating and dilation, relating of the myocardium
Norepinephrine, RAAS, aldosterone, vasopressin, BNP
TNF (tumor necrosis factor is produced from a failing heart
HF diagonsis - using what? (cath can find HF)
Pulmonary Artery Catheter (Swan-Ganz)
HF diagnosis using an arterial line - which one? (Art can diagnose HF with a radio)
Radial artery, continuous BP measurement
Allen’s test & the 5 P’s for pulses (pain, pallor, pulse, paresthesia, paralysis)
HF - BNP: B-type natriuretic peptide (Bumpin 100 to a 1000)
BNP: B-type natriuretic peptide (ventricular stretch)
> 100pg/mL = heart failure
> 1000 your patient is REALLY sick
HF diagnosis - CXR - xray - (xray my large, fat heart)
Enlarged heart, pulmonary edema
HF diagnosis - ECG measures what? (E for ECG, E for EF)
Echocardiogram
EF, pumping action
HF - New York Heart Association Functional Classification (just 1-4)
1-4 (4 being the worst)
manifestations of right sided failure
Viscera and peripheral congestion
Jugular venous distention (JVD)
Dependent edema
Ascites
Weight gain
Enlarged organs
Hepatomegaly
manifestations of left sided failure - and cough?
Pulmonary congestion, crackles
Dyspnea on exertion (DOE), dyspnea
Low O2 sat
Dry, nonproductive cough initially
Blood-tinged frothy sputum
signs of HF in general (OVERLOAD)
O orthopnea
V ventricular failure
E enlarged heart
R reported weight gain
L lungs congested
O output decreased
A apprehension
D dependent edema
HF gerontologic - signs (really the same ones)
May present with atypical signs and symptoms such as fatigue, weakness, and somnolence
HF and aging - these are all normal parts of aging, but they lower the threshold - left ventricle diastole? (left ventricle got collagen in its old age)
Lowers the threshold for HF
Decline in left ventricular diastolic function due to increase of myocardial collagen, myocardial stiffening and prolonged myocardial relaxation
HF management
Drug therapy
Nutritional therapy
Fluid restriction
Weight monitoring
Research therapies
Transplantation
LVAD (left ventricular heart device) **THESE ppl will not have a BP, just a mean arterial
drugs that decrease afterload (the As decrease A-afterload)
ACE, (end in captopril) ARBs
decrease afterload and preload (Arby’s before and after)
ARB (valsartan)
vasodilators decrease preload or afterload? (dilate when it’s too late)
decrease afterload (hydro and nitro)
diruetics decrease
preload
digotoxin does what? (digs for a deeper contraction)
increases contractility
HF nursing management
provide symptom relieve and education, improve ventilation (RR, O2, position, monitor lungs), energy management (prevent fatigue, monitor activity, encourage activity), hemodynamic regulation (HR, preload, afterload, contractility, electrolytes, fluids, meds, I&O, weights)
ACE inhibitors - monitor for (hyper kalema plays with aces)
ACE inhibitors block aldosterone, which increases sodium. hypotension, hyperkalemia, and altered renal function; cough
beta blockers - how long to start working?
prescribed in addition to ACE inhibitors; may be several weeks before effects seen; use with caution in patients with asthma
dig - monitor for
monitor for digitalis toxicity especially if patient is hypokalemic
IV medications - which one for LV failure?
indicated for hospitalized patients admitted for acute decompensated HF
Milrinone: decreases preload and afterload; causes hypotension and increased risk of dysrhythmias
Dobutamine: used for patients with left ventricular dysfunction; increases cardiac contractility and renal perfusion
Ivabradine (Corlanor) – (Ivan blocks and slows down my heart)
Ivabradine (Corlanor) – blocks SA node channel and decreases HR.
Goal is HR <70 since there is a 30% > risk of death with a HR >70
Take with food
Increases risk for atrial fibrillation