Peds Congenital & Acquired Cardiac Disorders Flashcards
2 Types of PEDS CARDIAC DISORDERS
- Congenital Heart Disease (CHD)
- Acquired Heart Disease
Define:
Structural cardiac abnormalities that are present at birth
Congenital Heart Disease (CHD)
Define:
Cardiac Disorders that occur AFTER birth
Acquired Heart Disease
What aspects of a child’s history are important when assessing for a cardiac disorder?
- Symptom Onset: Note when symptoms began and their duration.
- Symptom History: Assess for history of orthopnea, dyspnea, growth delays, squatting, edema, dizziness, and frequent pneumonia episodes.
- Feeding and Growth Concerns: Identify poor feeding signs such as fatigue, lethargy, vomiting, and failure to thrive.
What PAST medical history? should be assessed?
- Information about child’s past history and mother’s pregnancy history
- Frequent infections
- Chromosomal abnormalities, Autoimmune disorders
- Prematurity
- Stress or asphyxia at birth
- Alcohol, illicit drug use, exposure to radiation
- Use of medications such as corticosteroids
Physically assess babies ___.
undressed!
(no blankets, no clothes)
5 main S/S of babies unable to breath
- Head bobbing: need head up to get more oxygen
- Sternal & Subcostal retractions: subcostal seen only on babies
- Belly breathing
- Tripod position/preferred seating
- Grunting: WITH EVERY SINGLE RESPIRATION- trying to keep airway open
4 S/S of Circulation problems
- Mottling/Pallor
- Any noticeable & significant bleeding
- Cyanosis
- abnormal pulses
If you have a baby with BP lower than 80 for babies what do you do FIRST?
Check the carotid or femoral pulses!
* Dont immediately start CPR
When Auscultating babies heart, we auscultate where & for how long?
1 full minute- APICAL HR
When comparing blood pressure in the upper and lower extremities on a baby, what should be the expected result?
There should be no major differences between the blood pressure readings in the upper and lower extremities.
Q: What should be done BEFORE a Cardiac Catheterization on a child?
List 8
- Baseline vital signs – note fever or other signs of infection
- Height and weight
- Allergies – especially to iodine/shellfish
- Review medications – typically hold anticoagulants
- Assess peripheral pulses – mark pedal pulses with marker
- NPO 4 to 6 hours before procedure- different than adults
- Use variety of teaching methods – videotapes, books, etc.
- Signed consent - from parents
Starting:
Disorders with decreased PULMONARY blood flow
There are 2
- Tetralogy of Fallot
- Tricuspid Atresia
What happens in disorders with decreased pulmonary blood flow?
- There is some obstruction of blood flow to the LUNGS
- Oxygen desaturation (50%-90%)- ranging from mild to severe
- Can lead to severe cyanosis
Q: How do the kidneys compensate for low blood oxygen levels?
kidneys produce more erythropoietin, which stimulates the bone marrow to produce more (RBCs).
What are the results of increased erythropoietin production (EPO) in response to low blood oxygen levels?
-
Polycythemia
-Increased blood volume
-Increased blood viscosity: causes clots
-Increased workload of the heart
Is there a change in the amount of blood reaching the lungs for oxygenation in decreased pulmonary blood flow disorders?
No. Blood flow to the lungs remains unchanged, meaning the same amount of blood reaches the lungs.
* Body adapts thru various mechanisms such as shunting or collateral circulation, to keep blood circulating
* However, this is insufficient for proper oxygenation, leading to compensatory mechanisms like increased RBC produciton, which still does not fully resolve the oxygenation issue.
Q: What is TETRAlogy of Fallot?
is a congenital heart defect that consists of FOUR abnormalities
- Pulmonary stenosis
- Right ventricular hypertrophy
- Overriding aorta: aorta positioned directly over ventricular septal defect (VSD) instead of arising solely from L. Ventricle
- Ventricular septal defect (VSD)
When is Tetralogy of Fallot usually diagnosed, and what are the common signs?
- Usually diagnosed in the first weeks of life due to the presence of a murmur or cyanosis (a bluish tint to the skin from low oxygen levels).
What happens as the Patent Ductus Arteriosus (PDA) closes in the first few days of life in Tetralogy of Fallot?
more severe cyanosis can occur
* due to decreased blood flow to the lungs, further limiting oxygenation.
What are common symptoms of Tetralogy of Fallot in infants?
- Difficulty feeding
- Limited weight gain
- Polycythemia (increased RBCs)
- Dyspnea (shortness of breath)
- Hypercyanotic spells (Tet spells): episodes of severe cyanosis, often triggered by crying or feeding
How should hypercyanotic (Tet spells) be managed?
List 6
- Provide a calm, comforting approach
- Place the infant or child in a knee-to-chest position
- Provide supplemental oxygen
- Supply IV fluids: Restores circulation and helps improve oxygen delivery
2 MEDS given for Hypercyanotic (Tet Spells)
- Administer morphine sulfate (0.1 mg/kg IV, IM, or SQ): Relieves pain and reduces the respiratory rate, improving oxygenation
- Administer propranolol (0.1 mg/kg IV): beta blocker- Reduces the frequency and severity of Tet spells by improving right ventricular function
How is Tetralogy of Fallot managed?
- Surgery for the 4 defects: Typically required during the first year of life to correct the defects.
- REgular follow up visits with Cardiologists
What is the prognosis for most infants after surgery for Tetralogy of Fallot?
Most infants can expect to live active, healthy lives after surgery
2nd form of Decreased Pulmonary Blood Flow
Tricuspid Atresia
Q: What is Tricuspid Atresia?
- A congenital heart defect where the TRICUSPID VALVE is absent
- Blocking blood flow from the right atrium to the right ventricle.
How does blood flow to the lungs in Tricuspid Atresia?
- Right side of the heart unable to pump blood to the lungs
- Blood must flow through an atrial septal defect (ASD) (or patent foramen ovale (PFO)) to allow some oxygen-poor blood from the right side of the heart to mix with oxygen-rich blood in the left ventricle and then flow directly into the pulmonary artery.
In tricuspid atresia, many patients may also have a ___ defect.
Ventricular septal defect (VSD)
What happens if a LARGE Ventricular septal defect (VSD) is present in Tricuspid Atresia?
A large VSD allows more blood to move into the lungs, which can lead to heart failure (cor pulmonale)
What are common S/S of Tricuspid Atresia?
- Blue or gray skin and lips due to low blood oxygen levels (hypoxia)
- Tachycardia
- Difficulty breathing (dyspnea)
- Tiring easily
- Poor feeding or slow weight gain
- Symptoms of heart failure
- Clubbing of fingers with chronic hypoxemia
- Increased risk of RESPIRATORY infections
Tricuspid Atresia Management
- Monitor BP and HR closely: detect any changes in stability.
- Monitor cardiac rhythm: Watch for atrial arrhythmias
- Observe for signs of hypoxia: administer oxygen as needed.
- Echocardiogram: confirms the absence of the tricuspid valve
- Cardiac catheterization (angiography): reveals full extent of structural defects and blood flow issues.
- Early surgical correction: ESSENTIAL!!
- Prostaglandin e1 (Alprostadil): Medication that keeps the ductus arteriosus open to ensure blood flow to the lungs until surgery can be performed. -KNOW!!!!
Prostaglandin E1 is made by what woman organ during pregnancy?
Placenta
Can pregnant women take acetaminophen or ibuprofen for pain (headache) relief?
acetaminophen- tylenol
There are 3 things that CLOSE a ductus arteriosus
- Prostaglandi E1 supply is cut OFF
- Oxygen (O2)
- Anti-inflammatory meds: ibuprofen, etc
Q: A newborn is diagnosed with Tricuspid Atresia. Which of the following interventions is most important to ensure proper pulmonary blood circulation until surgical correction can be performed?
a) Administering intravenous fluids
b) Keeping the ductus arteriosus open with prostaglandin (Alprostadil)
c) Monitoring for signs of hypoxia and administering oxygen
d) Administering antibiotics to prevent infection
b) Keeping the ductus arteriosus open with prostaglandin E1 (Alprostadil)
Explanation: In tricuspid atresia, the absence of the tricuspid valve causes blood flow obstruction to the lungs. The ductus arteriosus, a fetal blood vessel, allows blood to bypass the nonfunctional right side of the heart and reach the lungs. Prostaglandin (Alprostadil) is used to keep the ductus arteriosus open until surgical intervention can correct the heart defect. This is a critical step in ensuring adequate oxygenation and blood flow to the lungs in these patients.
Next Congenital Disorder:
3 Disorders with INCREASED pulmonary blood flow
- Atrial Septal Defect
- Ventricular Septal Defect
- Patent Ductus Arteriosus
S/S of INCREASED Pulmonary Blood Flow
- Most CHDs involve INCREASED pulmonary blood flow: Many congenital heart defects result in more blood being directed to the lungs.
- LEFT side of the heart has HIGHER pressure than the right side: This pressure difference is a key factor in blood flow patterns in the heart.
- Increased blood flowto the RIGHT side of the heart: Leads to higher pressure in the lungs.-right side sends blood to lungs
- Increased blood flow to the lungs: Elevates the risk of pulmonary infections.
- Heart failure (HF) may develop EARLY in life: If the blood flowing to the lungs is excessive, heart failure can occur.
- Heart failure is a common reason for hospitalization:
____ is the most common cause for admission in children with Congenital Heart Defects (CHD).
Heart Failure (HF)
Interventions for INCREASED Pulmonary Blood Flow
Digitalis, ACE inhibitors, and diuretics to improve heart function and reduce fluid overload.
* Monitor for signs of digoxin (dig) toxicity
* Measure blood pressure (BP) before and after ACE-I administration: Hold the medication if BP drops more than 15 mmHg.
* Daily weights: Track fluid balance and detect early signs of fluid retention.
* Carefully monitor potassium levels:
* Oxygen supplementation is generally NOT helpful
Why is O2 supplementation generally NOT helpful for patients with INCREASED pulmonary blood flow?
Oxygen acts as a pulmonary vasodilator, which can increase blood flow to the lungs and worsen congestion.
1st Disorder:
What is Atrial Septal Defect (ASD)
- A hole exists in the wall (septum) between the right atrium and left atrium.
- Blood flows from the left atrium to the right atrium, causing an increased volume of blood in the right atrium.
- This results in increased blood flow to the lungs, which can lead to congestion and additional strain on the heart.