Cardiovascular- Exam 1 Flashcards
A physiological state where cardiac output is insufficient to meet the needs of the body
heart failure
Heart failure can be a problem with ___ or ___ of the heart
structure
function
Causes of heart failure
CAD
Uncontrolled HTN
MI
Renal Dysfunction
Cardiomyopathy
DM
Heart valve disorders
Causes of atherosclerosis
Tobacco
Elevated lipids
Diet
Sedentary
Causes of renal dysfunction
volume overload
Volume of blood pumped throughout the body per minute
Cardiac output
Cardiac output equation
HR x SV = CO (L/min)
Volume of fluid in ventricles at end of diastole
preload
The amount ventricles stretch at end of diastole
Preload
Relaxation and filling phase
Preload
AV valves are ____ in the preload
Open
Name the AV valves
Mitral
Tricuspid
The resistance that the left ventricle must overcome to eject and circulate blood
afterload
______ is the squeeze
Afterload
Name the semilunar valves
Pulmonic and aortic
Pressure opens semilunar valves to push blood out through circulation
Right to lungs, left to peripheral
Afterload
The right side of the heart pushes blood to the
lungs
The left side of the heart pushes blood to the
peripheral/systemic
The afterload is affected by the
Systemic Vascular Resistance (SVR)
Increasing the preload will increase what two other factors?
Stroke volume and cardiac output
How to increase preload amount?
IV Fluids
Stimulate SNS
How do you decrease preload?
Diuretics
Vasodilation
Diagnosis requiring increased preload
hypovolemic shock
Diagnosis requiring decreased preload
fluid overload in HF
HowTo increase afterload:
increase vasoconstriction
Diagnoses requiring increased afterload
Aortic stenosis
Pulmonary HTN
Measurement in percentage of total blood volume that the left ventricle pumps out with each contraction
Ejection fraction
The right ventricle plays a supporting yet important role in?
Circulation
The right ventricle sends deoxygenated blood to the?
Lungs for oxygenation and then back to the left side of the heart
The right ventricle pumps what kind of blood?
Deoxygenated
Right-sided HF is AKA
Systolic failure
Systolic failure is a _____ problem
contraction
The left ventricle is the _________ of the heart
Powerhouse
The left side of the heart sends blood where?
To the peripherals or systemically
Left-sided HF is AKA
Diastolic failure
Left-sided HF is a ______ problem
Relaxation
Deterioration of a structure or system previously working with the help of compensatory mechanisms
Decompensated
Organ that functions to circulate blood and perfuse tissue
Heart
A state of insufficiency or declined performance leading to dysfunction of a body system or organ
Failure
Symptoms of Acute Decompensated HF (ADHF)
Increased respiratory rate
Fluid shift with interstitial edema
Tachypnea and SOB
Pulmonary edema with hemoptysis
Symptoms of pulmonary edema with hemoptysis
Crackles
Tachycardia
Hypotension
Severe dyspnea
Orthopnea
Use of accessory muscles to breathe
Where does liquid accumulate in the lungs with pulmonary edema?
tissue
alveoli
What are some concerns for patients with pulmonary edema?
Impaired gas exchange
Acute respiratory failure
What are the 5 things we are trying to prevent with ADHF?
Acute respiratory distress
Cardiogenic pulmonary edema
Acute respiratory failure
Cardiogenic shock
Death
ADHF Rapid Interventions:
ABC’s
Place on monitor
Position
What does oxygen therapy treat in a patient with ADHF?
treat hypoxemic respiratory failure
What questions would you ask a pt presenting to the ED with ADHF?
-Are you allergic to any meds?
-What is your med hx?
-Are you taking any rx meds?
-Are you taking your meds as prescribed?
What may you see in the physical assessment portion of a pt with ADHF?
Decreased activity tolerance
Increased respirations and dyspnea
Rales or crackles on auscultation
Increased HR
Abnormal heart sounds
Peripheral edema
Jugular venous distention
High BP
Cardiac arrhythmias
How is HF diagnosed?
med hx
assessing s/s
diagnostic tests
What is HFpEF?
Heart failure preserved ejection fraction
What is HFrEF?
Heart failure reduced ejection fraction
Why is an ECG used on a patient who presents to the ED with heart symptoms?
To assess and rule out MI
What heart structure changes might you see on an ECG?
left ventricle hypertrophy
What is the cause of left ventricular hypertrophy?
The heart pumping too hard
A patient with heart symptoms presents to the ED - his CXR shows fluid in the lungs. What does this suggest?
pulmonary edema
A patient with heart symptoms presents to the ED - his CXR shows an enlarged heart suggesting?
Pulmonary arterial hypertension
A patient with heart symptoms presents to the ED - her CXR shows air between her lung and chest wall, what does this suggest?
pneumothorax
A patient with heart symptoms presents to the ED - the CXR shows infiltrates (blood, pus), what does this indicate?
Pneumonia
What labs may be run to determine if a cardiac event has occurred?
- Cardiac biomarkers (troponins, CK-MB, BNP, myoglobin)
- Renal function (BUN/cr)
- Electrolytes (K+, mg)
Normal range of BNP
<100 pg/mL
the hormone secreted by cardiomyocytes in the heart ventricles in response to stretching caused by increased ventricular blood volume
BNP (brain natriuretic peptide)
Why is a loop diuretic given to a patient with HF?
fluid excretion and elimination
(furosemide)
Why is nitroprusside given to a patient with HF?
To generate rapid onset vasodilation
Why is an ACE inhibitor given to a patient during a cardiac event like HF?
To reduce cardiac workload by increasing vasodilation to lower BP
(Lisinopril)
How does an angiotensin receptor blocker affect a patient in HF?
It decreases BP and cardiac workload
(Valsartan)
Why is hydralazine given to HF patients?
to lower BP by vasodilation
What does digitalis accomplish for a patient in HF?
Increases cardiac contractility and LV function
What medication directly blocks negative effects of SNS on a failing heart by decreasing the HR to allow the L ventricle time to fill more completely?
Beta blockers
Why is morphine given to a patient in HF?
Vasodilation to decrease dyspnea, anxiety, and cardiac workload
When would you not give morphine to a HF patient?
When their RR are too low
What do you give a patient if they become hypotensive during HF treatment?
Give vasopressin
(Dopamine or dobutamine)
What are the priority nursing interventions for a patient in HF?
Monitor vital signs
Admin O2
Positioning
Intake & Output - Na and fluids?
Daily weights
Venous thromboembolism Prevention: SCD, heparin
Admin medications