Cardiac Dysfunction Flashcards
Atresia
absent or closure of something
Stenosis
narrowing
What is the blood flow through the body
Superior/Inferior Vena Cava
Right atrium
Tricuspid
R Ventricle
Pulmonary Valve
Pulmonary Artery (only artery with deoxygenated blood)
Lungs
Pulmonary Vein (only veins with oxygenated blood)
L Atrium
Mitral Valve
L Ventricle
Aortic Valve
Aorta
Body
What are the changes in the heart after birth?
The foramen ovale shunt in r atrium is closed
Patent ductus arteriosus closes and becomes ligamentum arteriosus
What is different between the fetal circulation than adult circulation?
fetal closes off the lungs and shunts all blood away from the lungs to the body
What is the normal cardiac anatomy?
4 chambers
superior and inferior vena cava with aorta
Tricuspid, Pulmonary, Mitral, and Aorta values
Left is systemic ha higher pressure in the normal heart due to shunting blood to the entire body
Right is pulmonary pressure is less than the systemic
Cardiac Pressures
highest (left, systemic) to lowest (right, pulmonary)
If there is no flow of blood, then
no grow due to no O2 and nutrients getting to the body
Congenital Heart Disease
abnormalities present at birth
Acquired Heart Disease
after birth
- infection
-autoimmune
- environmental
- family tendencies
Congenital Heart Disease results in
abnormal cardiac function
- major cause of death in 1st year of life
What is the most common defect of congenital heart defects?
Ventricular Septal Defect (VSD
Congenital Heart Disease Causes
90% unknown
Maternal (fetal alcohol syndrome, Dilantin (seizure meds), advance maternal age, DM, Lupus, Rubella)
Chromosome abnormality (Down Syndrome)
Congenital Heart Disease Physical Assessment?
FFT
Cyanotic or pallor (poor perfusion)
Chest enlarged
Jugular pulses distension (unusual pulsations)
Tachypnea, dyspnea, grunting
Clubbing
Palpate liver on right side failure
Murmur
If you can plapate the liver on assessment with s/s, then what heart failure would it be?
Right sided
If suspecting congenital heart disease, what dx procedures would they run?
12 LEAD ECG
XRay - cardiomegaly/pulmonary congestion
ECHO- 1-hour
MRI
Cardiac Cath
Cardiomegaly is when the heart size is
half the size of the chest
ECHO shows what
structures and blood flow patterns
baby or developmental delays need to be still
- possible PICU for sedation
Cardiac Catheterization can be used for
Diagnostic
- measure pressure and see blood flow patterns
- before surgery to see
Interventional
- Balloon procedures for narrowed valves and stents
Electrophysiology
- irregular rhythm
Altered Hemodynamics in Congential Heart Disease
Higher pressure to lower pressure
- path of least resistance
In Congenital Heart Disease,
higher pressure
faster flow
In Congenital Heart Disease,
higher resistance
slower flow
Left to Right Shunt means
blood flows from area of higher pressure to lower pressure
Left to Right shunt is located
allows blood from left ventricle into the right ventricle
Right to Left Shunt
blood shunted from the right side to the left
Congenital Heart Defects
Left to Right Shunt
Right to Left Shunt
Right to Left Shunt location
right ventricle to left ventricle with deoxygenated blood into the rest of the body
Right to Left Shunt can cause what
Pulmonary stenosis for right-sided increase
- Cyanosis starts at the mouth due to deoxygenated blood into the body
Congenital Heart Defects
blood flow patterns
Increased pulmonary blood flow
Decreased pulmonary blood flow
Obstruction to blood flow out of the heart
Mixed blood flow
Congenital Heart Defects with Increased pulmonary blood flow
Atrial septal defect (ASD)
Ventricular septal defect (VSD)
Patent Ductus Arteriosus (PDA)
Increased pulmonary blood flow occurs when a
Defects along the septum or abnormal connection between great arteries
- Left-to-right shunting of blood
- Increased blood volume on the Right side of the Heart
- Increased Pulmonary Blood Flow
Atrial Septal Defect is the
abnormal opening between atria in the septum (failure to close of the foramen ovale)
-allows blood flow from l. atrium to r.atrium
The ASD, pushes more
blood into the lungs
If the ASD is a small defect, then what are the s/s?
asymptomatic
- paradoxical embolus
If the ASD is a small defect, then what are the s/s?
CHF is unusually possible in older children if untx
-fatigue
-SOB
-respiratory infections
When listening to the heart what sounds to do hear and what are the meanings?
LUB - closing of the atrium to ventricles (Tricuspid and Mitral)
DUB - closing of the pulmonary and aortic valves
What heart sound is heard with ASD?
LUB DU-UB
- due to the pulmonary valve closing a little later than the aorta valve because of the massive inflow of more blood than the left atria
ASD Tx
Spontaneous closure (size and age)
Transcatheter Closure
- Septal occluders - smaller defects
Surgical Closure
- small defect-suture
- large (patch with pericardial or Dacron)
After a septal occluder is placed, what medication should the child be on
low-dose aspirin for 6 months
Atrial Septal Defect should be repaired before
school age (5)
Ventricular Septal Defect (VSD) IS THE
Abnormal Opening between Right & Left Ventricles
- BLOOD FLOWS FROM THE LEFT VENTRICLE TO THE RIGHT VENTRICLE
- pinhole to no septum
VSD Heart sounds when ausculated?
In the 3rd location at the r. ventricular spot you will hear
swoosh DUB(faint) swoosh
-polo systolic murmur
Small VSD s/s
asymptomatic
o2 levels good
no physical restrictions
reassurance and periodic follow-up with cardiologist
Large VSD s/s
CHF
VSD Tx
spontaneous closure (20-60%) - size and age
Transcatheter Closure with septal occluders
Small defects - sutures
Large defects - patch pericardial/Dacron
What is another procedure done on VSD as a possible palliative procedure?
Pulmonary Artery Banding
goal: decrease pulmonary blood flow
Patent Ductus Arteriosus (PDA) is the
Failure of the Fetal Ductus Arteriosus to close within first few weeks of life
PDA blood flow
higher(Aorta) to lower (Pulmonary artery)
Left to right shunt
PDA location is the
aortic arch into the pulmonary arteries
- oxygenated blood goes into the pulmonary artery into the lungs
PDA small defect s/s
asymptomatic
PDA large defect s/s
CHF
FTT
“Machine like murmur” - washing machine
frequent respiratory infections
PDA Tx medication closures
Indomethacin (Indocin)
Premature infants
Some newborns
How is the ductus arteriorous kept open in the womb?
prostaglandin
Indomethacin is what type of medication
prostaglandin inhibitor (ductus to close)
PDA Tx transcatheter
coils
PDA Tx Surgical
Left Thoracotomy Incision for Litigation
- clamp off blood flow through the ductus
- incision is under the shoulder blade
Congenital Heart Defects with DECREASED pulmonary blood flow
Tetralogy of Fallot
Tricuspid Atresia
If a mother has Rubella, what defect could the infant have as a result?
PDA
Decreased Pulmonary blood flow is caused by
obstruction of pulmonary blood flow + anatomic defect between side of the heart **ASD/VSD
With low pulmonary blood flow, the pressures do what
right side pressures increases and exceeds left-sided pressure
The increase of right sided pressure leads to
desat blood shunted right to left and to systemic circulation
Hypoxemia and cyanosis
Tetralogy of Fallot (TOF) has what 4 cardiac defects?
- VSD
- Pulmonary stenosis
- Overriding Aorta
- R. Ventricular Hypertrophy
TOF blood flows from
right to left
TOF s/s
chronic cyanosis
tachypnea - compensate
Acute epi. of cyanosis and hypoxia
Clubbing
Impaired growth
TOF - Hypercyanotic Spells preceded by
feeding, crying, defecation, or stressful procedures
Hypercyanotic spells
infundibular spasm decrease pulmonary blood flow
Increase Right to Left shunt
- desat blood flows to the systemic circulation
- acute cyanosis and hypoxia
Infundibular
funnel-shaped
What can cause a decrease of BP?
hypovolemia
**vasodilation (meds, heat,exercise, fever)
Hypercyanotic spells aka
blue or tet spells
Hypercyanotic spells are frequent in
1st year of life with TOF
- rare less than 2 months
Hypercyanotic spells happen usually in the
morning
Hypercyanotic speels in the morning require
immediate recognition and intervention
- increase risk of emboli, seizures, LOC, death
What nursing interventions would you use for a hypercyanotic spell? SATA
- Knee-Chest Position “Squatting”
- Calm
- Blow-by 100% O2
- Give Morphine and repeat
- IV Fluid replacement PRN
- Knee-Chest Position “Squatting”
- Calm
- Blow-by 100% O2
- Give Morphine and repeat
- IV Fluid replacement PRN
What does the knee-chest squat do for a baby in hyper cyanotic spells?
kinks the femoral arteries and puts more blood to travel to the pulmonary system and increases left-sided pressure
TOF Tx
educate family on recognition/intervention of hypercyanotic spells
-hydration (IVF)
prevent infections (fevers to HCP)
Anemia Tx (less O2 with RBCs)
If the TOF is severe, what tx will be required?
surgical correction WITHIN 1ST year of life
- palliative shunt
-complete repair
TOF is Dx by
ECHO
Obstructive Congenital Heart Defects
Coarctation of the Aorta
Aortic Stenosis
Pulmonic Stenosis
Obstructive Defects are when the blood
exits the heart and meets anatomic narrowing (stenosis)
- obstruction to blood flow
Obstructive Defects increase the pressure of
ventricles and vessel behind obstruction
Obstructive Defects decrease the pressure of
after the obstruction
Coarctation of the Aorta is the
Narrowing of the Aorta near the insertion of the Ductus Arteriosus
COA increases pressure
proximal to the defect (near defect)
- head and upper extremities
COA decreases pressure
distal to the obstruction (away)
- body and lower extremities
COA S/S
- Arms: elevated BP and bounding pulses
- LEGS: low BP, weak/absent femoral pulses and in lower extremities
CHF
COA Tx
Cath Lab through femoral
- Older infants and children: balloon angioplasty
- Adolescents: stents
Surgical Repair (< 6mn.)