CHapter 41
I. Key Assessment Points for Cardiovascular Disorders in Children
Health History (Know this cold):
• Feeding: Poor feeding, fatigue with feeding, sweating (especially during feeds) – classic signs in infants.
• Color Changes: Cyanosis (especially lips, tongue, nail beds); ask “What color does the skin turn when crying?”
• Respiratory: Tachypnea, dyspnea, frequent pneumonia.
• Growth: Failure to thrive, poor weight gain, delayed motor milestones.
• Activity: Squatting (in toddlers – relieves dyspnea by increasing SVR), inability to keep up with peers.
• Past Medical: Prematurity, maternal infections, chromosomal anomalies, corticosteroid use.
Exam Tip: They love asking “What is the most concerning history detail?” – Answer: Sweating while feeding, cyanosis that doesn’t improve with O2, frequent respiratory infections.
II. Specific Physical Signs You Must Memorize
Inspection:
• Clubbing: Late sign of chronic hypoxia (>1 year old).
• Precordial bulge: Often in older children with cardiomegaly.
• Color: Look for gray-blue tone = central cyanosis.
• Edema: In infants → face; older children → lower extremities.
Palpation:
• Femoral Pulse: Weak or absent = suspect coarctation of aorta.
• Hepatomegaly: Suggests right-sided heart failure.
Auscultation:
• Apical pulse: Listen full minute!
• Murmurs:
• S3: Pathological if heard when child is upright → suspect heart failure.
• S4: Suggests decreased compliance (e.g., cardiomyopathy).
• Click at apex: May be mitral or aortic origin.
• Bounding pulse: Suspect PDA.
• Thread pulse: Aortic stenosis or shock.
Exam Trap: “A mother hears a murmur when the child lies down” – benign? Not always! Check position, grade, and any associated findings (e.g., thrills, symptoms).
III. Cardiac Catheterization – Exact Pre/Post-op Nursing
Before:
• NPO: 4–6 hours.
• Allergy Check: Shellfish/iodine (contrast dye).
• Baseline: Weight (for med dosing), vitals, pedal pulses, O₂ saturation.
• Sedation prep: Explain to parents, include child based on age.
After:
• Leg straight: For 4–8 hours (vein entry).
• Monitor site: Bleeding, hematoma.
• Pedal pulse check: Every 15 minutes initially.
• Monitor urine output: Contrast can damage kidneys.
• S/S infection or poor perfusion: Cool limb, low pulse, discoloration.
If bleeding after apply pressure 1 in above the site to create pressure over area reducing blood flow
Exam Question Clue: “A nurse notes the right foot is cooler and paler than the left after cardiac catheterization.” → Call provider immediately.
IV. Lab & Diagnostics: Match Test with Purpose
V. Medication Education – Critical Nursing Implications
Digoxin:
• Hold if HR <90 (infant), <70 (child).
• Monitor for toxicity: Vomiting, bradycardia, anorexia, visual halos.
• Therapeutic level: 0.8–2 ng/mL
• Missed dose? → Give if within 12 hours, skip if close to next.
Furosemide (Lasix):
• Monitor: BP, electrolytes (esp. K+), hearing.
• Give with food or milk to reduce GI upset.
• Causes photosensitivity.
Alprostadil:
• Maintains ductus arteriosus.
• Watch for apnea in neonates (20% risk).
• Monitor pO₂, temp, and for abdominal distention.
Exam Trap: If a child is on digoxin and furosemide, always be alert for hypokalemia, which increases digoxin toxicity risk.
VI. Nursing Diagnoses with Interventions (Chart-style)
VII. Red Flag Scenarios
• Cyanosis that doesn’t improve with O₂ = Cardiac, not pulmonary cause.
• Sweating with feeds = Strong indicator of infant heart failure.
• Bounding upper extremity pulse but weak femoral = Coarctation of the aorta.
• Squatting = Classic in Tetralogy of Fallot; increases SVR to improve oxygenation.
Got it! Let’s break this down into hyper-specific, exam-focused nursing care and education points based on what your textbook covered. This will help you confidently answer scenario-based, priority-focused, and trick questions on your exam.
I. Key Assessment Points for Cardiovascular Disorders in Children
Health History (Know this cold):
• Feeding: Poor feeding, fatigue with feeding, sweating (especially during feeds) – classic signs in infants.
• Color Changes: Cyanosis (especially lips, tongue, nail beds); ask “What color does the skin turn when crying?”
• Respiratory: Tachypnea, dyspnea, frequent pneumonia.
• Growth: Failure to thrive, poor weight gain, delayed motor milestones.
• Activity: Squatting (in toddlers – relieves dyspnea by increasing SVR), inability to keep up with peers.
• Past Medical: Prematurity, maternal infections, chromosomal anomalies, corticosteroid use.
Exam Tip: They love asking “What is the most concerning history detail?” – Answer: Sweating while feeding, cyanosis that doesn’t improve with O2, frequent respiratory infections.
II. Specific Physical Signs You Must Memorize
Inspection:
• Clubbing: Late sign of chronic hypoxia (>1 year old).
• Precordial bulge: Often in older children with cardiomegaly.
• Color: Look for gray-blue tone = central cyanosis.
• Edema: In infants → face; older children → lower extremities.
Palpation:
• Femoral Pulse: Weak or absent = suspect coarctation of aorta.
• Hepatomegaly: Suggests right-sided heart failure.
Auscultation:
• Apical pulse: Listen full minute!
• Murmurs:
• S3: Pathological if heard when child is upright → suspect heart failure.
• S4: Suggests decreased compliance (e.g., cardiomyopathy).
• Click at apex: May be mitral or aortic origin.
• Bounding pulse: Suspect PDA.
• Thread pulse: Aortic stenosis or shock.
Exam Trap: “A mother hears a murmur when the child lies down” – benign? Not always! Check position, grade, and any associated findings (e.g., thrills, symptoms).
III. Cardiac Catheterization – Exact Pre/Post-op Nursing
Before:
• NPO: 4–6 hours.
• Allergy Check: Shellfish/iodine (contrast dye).
• Baseline: Weight (for med dosing), vitals, pedal pulses, O₂ saturation.
• Sedation prep: Explain to parents, include child based on age.
After:
• Leg straight: For 4–8 hours (vein entry).
• Monitor site: Bleeding, hematoma.
• Pedal pulse check: Every 15 minutes initially.
• Monitor urine output: Contrast can damage kidneys.
• S/S infection or poor perfusion: Cool limb, low pulse, discoloration.
Exam Question Clue: “A nurse notes the right foot is cooler and paler than the left after cardiac catheterization.” → Call provider immediately.
IV. Lab & Diagnostics: Match Test with Purpose
V. Medication Education – Critical Nursing Implications
Digoxin:
• Hold if HR <90 (infant), <70 (child).
• Monitor for toxicity: Vomiting, bradycardia, anorexia, visual halos.
• Therapeutic level: 0.8–2 ng/mL
• Missed dose? → Give if within 12 hours, skip if close to next.
Furosemide (Lasix):
• Monitor: BP, electrolytes (esp. K+), hearing.
• Give with food or milk to reduce GI upset.
• Causes photosensitivity.
Alprostadil:
• Maintains ductus arteriosus.
• Watch for apnea in neonates (20% risk).
• Monitor pO₂, temp, and for abdominal distention.
Exam Trap: If a child is on digoxin and furosemide, always be alert for hypokalemia, which increases digoxin toxicity risk.
VI. Nursing Diagnoses with Interventions (Chart-style)
VII. Red Flag Scenarios
• Cyanosis that doesn’t improve with O₂ = Cardiac, not pulmonary cause.
• Sweating with feeds = Strong indicator of infant heart failure.
• Bounding upper extremity pulse but weak femoral = Coarctation of the aorta.
• Squatting = Classic in Tetralogy of Fallot; increases SVR to improve oxygenation.
1. Atrioventricular Canal Defect (AVSD / AV Canal)
Seen in 35–40% of children with Down syndrome
Pathophysiology:
• Failure of endocardial cushion → ASD + VSD + common AV valve
• Results in left-to-right shunting of oxygenated blood back to lungs
• Causes increased pulmonary blood flow, pulmonary edema, and heart failure
Timing of Symptoms:
• Usually appears at 4 to 8 weeks of age
• Initially asymptomatic due to high pulmonary resistance in neonates
Assessment / Signs:
• Tachypnea, diaphoresis with feeding, poor weight gain
• Frequent infections
• Characteristic harsh holosystolic murmur (left sternal border)
• Adventitious lung sounds (rales if heart failure is present)
• Thrill may be palpable if severe
Diagnostics:
• Echocardiogram or MRI = definitive
• Cardiac cath = pressure/flow eval
• CXR: cardiomegaly, pulmonary congestion
Parent Education:
• Monitor for sweating, fatigue, poor feeding
• Feed every 3 hours or less, limit feedings to <30 minutes
• Monitor daily weight
• Explain possible need for surgical repair and frequent follow-ups
2. Patent Ductus Arteriosus (PDA)
Common in preterm infants, high altitude births
Pathophysiology:
• Ductus arteriosus remains open → aorta shunts blood to pulmonary artery
• Causes volume overload on lungs → pulmonary hypertension
Timing of Symptoms:
• Detected within first 2 weeks of life
• May be asymptomatic if small
Assessment / Signs:
• Tachypnea, fatigue, poor growth
• Bounding peripheral pulses
• Wide pulse pressure (↑ systolic, ↓ diastolic)
• Harsh, continuous “machine-like” murmur under left clavicle
Diagnostics:
• Echo confirms size/severity
• ECG: may show LV hypertrophy if large PDA
• CXR: pulmonary congestion
Parent Education:
• If small, may close on its own
• Medical closure = indomethacin or ibuprofen
• Surgical closure if not resolved
• Teach signs of heart failure: breathing faster, sweating, not eating well
3. Coarctation of the Aorta
Accounts for ~10% of CHDs
Pathophysiology:
• Narrowing of aorta → ↑ pressure before narrowing, ↓ after
• Causes upper extremity hypertension, lower extremity hypoperfusion
• May lead to LV hypertrophy, collateral circulation
Timing of Symptoms:
• Often detected in infancy or school-age child during BP screening
Assessment / Signs:
• BP in upper > lower extremities by ≥20 mmHg
• Bounding radial/brachial pulses, weak or absent femoral pulses
• Leg pain with activity, headaches, dizziness
• Murmur on back or left axilla
Diagnostics:
• Echo = confirms narrowing
• CXR: rib notching (collateral circulation)
• ECG: LV hypertrophy
Parent Education:
• Monitor BP in all 4 extremities
• Educate on importance of early surgical repair
• Watch for leg cramps, poor endurance
• May require lifelong follow-up for re-coarctation or hypertension
4. Aortic Stenosis
Accounts for ~5% of CHDs
Pathophysiology:
• Obstruction at or below the aortic valve
• Causes LV to work harder, leading to LV hypertrophy
• ↓ cardiac output → poor systemic perfusion
Timing of Symptoms:
• Often asymptomatic early
• Can cause exertional chest pain, dizziness, fainting
Assessment / Signs:
• Fatigue, syncope, angina with activity
• Thrill at base of heart
• Systolic murmur at left sternal border, may radiate to neck
Infant-specific Signs:
• Poor feeding, weak pulses, pallor
• May present as shock in severe cases
Diagnostics:
• Echo: visualizes stenosis
• ECG: LV hypertrophy
• Exercise testing may be done in older children
Parent Education:
• Teach activity restrictions based on severity
• Instruct to report chest pain, fainting, or fatigue
• May require balloon valvuloplasty or valve replacement
5. Pulmonary Stenosis
Pathophysiology:
• Narrow pulmonary valve → RV can’t eject blood → RV hypertrophy
• Can cause reopening of foramen ovale → cyanosis
Timing of Symptoms:
• Mild = asymptomatic
• Severe: early onset cyanosis, dyspnea with exertion
Assessment / Signs:
• Systolic ejection murmur at left upper sternal border
• Click after S2
• Cyanosis if foramen ovale reopens
• RV heave, fatigue, exercise intolerance
Diagnostics:
• Echo: valve thickening or narrowing
• ECG: RV hypertrophy
Parent Education:
• Monitor for exertional dyspnea or cyanosis
• Educate on the possibility of needing a balloon valvuloplasty
• Teach that symptoms may worsen with growth
6. Transposition of the Great Vessels (TGV)
Medical emergency! Requires early surgery
Pathophysiology:
• Aorta and pulmonary artery are switched
• Creates parallel circuits: deoxygenated blood goes to body; oxygenated blood circulates back to lungs
• Not compatible with life without mixing
Timing of Symptoms:
• Presents in first few hours to days of life when PDA closes
• Rapid progression of cyanosis
Assessment / Signs:
• Cyanosis unresponsive to oxygen
• Tachypnea, retractions
• Single loud S2; murmur only if VSD or PDA also present
Diagnostics:
• Echo = confirms diagnosis
• Pulse ox: severe hypoxemia
• CXR: “egg on a string” heart
Parent Education:
• Immediate intervention needed
• Prostaglandin E1 (alprostadil) keeps PDA open until surgery
• Explain corrective surgery (arterial switch) done at 4–7 days old
• Teach signs of hypoxia, poor feeding, or cyanotic spells
What They’ll Test – Exam-Specific Watchpoints
SATA Likely Topics:
• Signs of coarctation = bounding arm pulses, weak leg pulses, BP difference
• Teaching for PDA = indomethacin, signs of HF
• Signs of AV canal = diaphoresis, poor feeding, harsh murmur
• Signs of TGV = cyanosis not relieved by oxygen, emergency prostaglandin
High-Risk Select Options:
• “What would you expect in a child with aortic stenosis?” → Fatigue, weak pulses, systolic murmur
• “What needs immediate intervention?” → O₂ sat 78% in newborn with known TGV
• “Which findings suggest worsening pulmonary stenosis?” → Cyanosis with exertion, fatigue, murmur intensifying
Pages 1485–1493 | Congenital & Acquired Heart Defects: Clinical & Test-Critical Notes
1. Total Anomalous Pulmonary Venous Connection (TAPVC)
Key Point: Pulmonary veins drain into right atrium, not left
• Requires ASD or PFO for survival
• Cyanosis without murmur in newborn
• Murmur appears later if septal defect is present
• Signs: Prominent RV impulse, hepatomegaly, retractions
• Echo + cardiac cath confirm diagnosis
High-Yield Tip: Mixing of oxygenated and deoxygenated blood → severe hypoxia if no ASD
2. Truncus Arteriosus
One major artery (instead of separate aorta/pulmonary) leaves heart
• Mixing of blood from both ventricles
• VSD always present
• ↑ pulmonary flow → pulmonary hypertension
• Signs: Cyanosis, feeding difficulty, grunting, retractions
Murmur: From VSD
Test Focus: Look for single great vessel, mixing, and progressive heart failure
3. Hypoplastic Left Heart Syndrome (HLHS)
Most critical & fatal defect if untreated
• Left ventricle underdeveloped or absent
• PDA-dependent circulation
• As ductus closes → shock & death without surgery
Signs: Rapid cyanosis, gray/blue skin, poor perfusion, gallop rhythm, weak pulses
Key Interventions:
• Prostaglandin E1 to keep PDA open
• Emergent surgery (3-stage Norwood or transplant)
NGN Danger Clue: “Infant begins to crash as ductus closes” = HLHS or TGV emergency
4. BOX 41.1 – Relieving Hypercyanotic (Tet) Spells
They will ask you this.
SATA:
• Knee-to-chest position
• Oxygen
• Morphine
• IV fluids
• Propranolol
5. Nutritional Needs in CHD Infants
• ↑ calorie needs: up to 150 cal/kg/day
• Infant formulas: 24–28 cal/oz
• Gavage feed if too tired
• Feed <20 min to conserve energy
• Small, frequent feedings
• Monitor weight daily
Note: Breastfeeding boosts immunity, may be hard for sick infants
6. Preoperative & Postoperative Care for Cardiac Surgery
Pre-op Priorities:
• Full history, including med/surgical, infections, and parent understanding
• Review recent lab/echo data
• Baseline vitals + weight
• NPO + fluid restrictions
• Educate on: ICU stay, equipment (pacing wires, chest tubes), incisions
• Let parents accompany child to OR if policy allows
Post-op Priorities:
• Vital signs q1h, cap refill, skin color
• Assess: heart rate/rhythm, edema, breath sounds
• Watch for:
• Cardiac tamponade = muffled heart sounds + ↑ HR + ↓ BP
• Chest tube output drop + ↑ HR = EMERGENCY
• Pain control, early ambulation, lung expansion exercises
NGN Trap Tip: Choose all that reflect monitoring perfusion, respiratory function, and bleeding
7. BOX 41.2 – Possible Post-Op Complications
You’ll see a SATA here.
• Cardiac tamponade
• Arrhythmias
• Hemorrhage
• Pneumonia
• Seizures
• Wound infection
• Postpericardiotomy syndrome
• Atelectasis
• Endocarditis
8. Teaching Guidelines 41.2 – Parent Teaching: CHD Child
SATA/NCLEX-Style Must-Know:
• Give meds as ordered
• Weigh daily same time, same scale, same clothes
• Allow child to rest between activities
• Provide high-calorie, nutritious food
• Teach infection prevention
• Track signs of worsening heart failure:
• ↓ wet diapers
• SOB
• Color changes
• Irritability
9. Heart Failure in Children
Most common cause = CHD
Up to 20% of CHD kids develop HF
Systolic Dysfunction Signs:
• Pulmonary congestion, ↑ work of breathing, feeding fatigue
• Rales, wheezing, retractions
Diastolic Dysfunction Signs:
• Hepatomegaly
• Jugular distention
• Periorbital/facial edema
Red Flags to Ask Parents:
• “Baby stops drinking and resumes later”
• “Sweats while feeding”
• “Sleeps better upright”
• “Rapid breathing during feeds”
10. Therapeutic Management & Meds
• Digoxin: Hold if HR < 90 (infants), <70 (kids), watch for vomiting/bradycardia
• ACE inhibitors: Watch for hypotension, monitor K+
• Diuretics: Daily weight, K+ loss
• Beta-blockers: For cyanotic spells
Perfect — here is a hyper-specific, exam-focused summary of pediatric cardiac disorders from pages 1480–1492, aligned to NGN/NCLEX and textbook-level questions. I’ve included must-know teaching points, SATA bait, red flag signs, and lab/assessment priorities. This covers exactly pages 1480 through 1492 — which includes AV Canal, PDA, Coarctation, Stenosis types, TGV, TAPVC, HLHS, CHF, and Cardiac Surgery Nursing Care.
I. Atrioventricular Canal Defect (AV Canal)
Hallmark Teaching/Exam Tips:
• Strongly associated with Down syndrome (35–40% of affected kids).
• Left-to-right shunt → increased pulmonary blood flow → heart failure
• Key Signs: sweating with feeds, poor feeding, failure to thrive
• Patho Tip: Oxygenated blood enters L atrium → re-circulates to lungs again via septum.
• Murmur: Characteristic holosystolic harsh murmur at L sternal border
Parent Education:
• Signs of heart failure (tachypnea, diaphoresis)
• Expect murmur early (4–8 weeks old)
• Early intervention often needed
II. Patent Ductus Arteriosus (PDA)
Clinical Highlights:
• Very common in preemies
• Allows oxygenated blood from aorta → pulmonary artery
• Causes left-to-right shunt
• SATA Red Flags:
• Bounding pulses
• Wide pulse pressure
• Diastolic BP may be low
• “Machinery-like murmur” (continuous, loudest at 1st–2nd ICS)
Exam Scenario Trap: PDA can keep cyanotic infants oxygenated briefly → watch for worsening symptoms when PDA closes
III. Coarctation of the Aorta
Key Signs You MUST Know:
• Upper extremity HTN; lower extremity hypotension
• Weak or absent femoral pulses
• BP in arms >20 mmHg higher than legs
• Systolic murmur (back or left axilla)
SATA Traps:
• Look for leg pain with activity
• Headaches
• Epistaxis (nosebleeds)
• RIB NOTCHING on CXR
• Murmur most audible at base of heart or left axilla
IV. Aortic Stenosis
• Obstruction between left ventricle and aorta
• Most common: narrowing at the valve
• Signs: chest pain, dizziness with standing, fatigue
• May be asymptomatic or have a systolic ejection murmur
• Pulse may be faint, thrill at base of heart
Exam Angle: if infant – look for poor feeding + faint pulses. With exertion → syncope, angina.
V. Pulmonary Stenosis
• Obstructs blood flow from RV to pulmonary artery
• Often tied to Tetralogy of Fallot
• RV hypertrophy develops
• Key Murmur: systolic ejection murmur with click
• SATA Signs:
• Dyspnea on exertion
• Cyanosis if severe
• Right-sided heart failure signs if prolonged
VI. Transposition of the Great Vessels (TGV)
Critical Exam Red Flags:
• Severe cyanosis that doesn’t improve with oxygen
• Aorta arises from RV and PA from LV → deoxygenated blood goes to body
• Often detected in first few days of life
• PDA may initially compensate
Must-Know: Surgery required within 4–7 days
VII. Total Anomalous Pulmonary Venous Return (TAPVC)
• Pulmonary veins connect to RA instead of LA
• Mixing of oxygenated & deoxygenated blood
• Causes volume overload of RA and RV → pulmonary edema
• Assessment:
• Cyanosis
• Tachypnea
• Edema
• Fixed splitting of S2
• Palpable liver
VIII. Truncus Arteriosus
• One large artery instead of aorta + pulmonary artery
• Mixed blood enters systemic + pulmonary circulation
• High risk of pulmonary over-circulation → CHF
• May have a murmur; may be associated with DiGeorge syndrome
IX. Hypoplastic Left Heart Syndrome (HLHS)
• L side of heart is nonfunctional
• Often fatal unless surgically corrected
• Blood shunted through PDA and ASD until closed
• Early Signs:
• Cyanosis
• Shock after PDA closes
• Gallop rhythm, poor feeding, weak pulses
Critical Teaching:
• Surgery needed in 3 stages OR heart transplant
• May need PGE (prostaglandin) to keep PDA open
X. Signs of Pediatric Heart Failure – Exam Goldmine
SATA/Exam Tip:
• Sweating during feeds
• Poor feeding, failure to thrive
• Tachypnea at rest
• Hepatomegaly
• Irritability
• Periorbital edema
• Frequent infections
• Pulmonary congestion signs:
• Nasal flaring
• Retractions
• Crackles, grunting
Apical HR may be rapid; assess for gallop rhythm, S3/S4
XI. Management of Congenital Heart Disease (1478–1492)
Nutrition Teaching Points:
• Use high-calorie formula (24–28 kcal/oz)
• Feed <30 min per session
• Frequent, small feedings
• NG/gavage if energy too low
• Daily weights, strict I/Os
Improving Oxygenation:
• Semi-Fowler’s for lung expansion
• Monitor SaO₂, respiratory effort, nasal flaring
• Use O2 cautiously with L→R shunts
Preventing Infection:
• Strict hand hygiene
• Endocarditis prophylaxis before dental/valve procedures
XII. Cardiac Surgery Care
Preop Care:
• Establish baselines
• Prepare child/family with developmentally appropriate language
• NPO before surgery
• Teach about expected equipment: chest tubes, O2 sat probes, pacing wires, dressings
Postop Care:
• Vital signs Q1H
• Cardiac monitor
• Check pulses, cap refill
• Assess for:
• Tamponade (↑HR, ↓BP, ↓output)
• Arrhythmias
• Poor perfusion
• Weight gain, crackles (fluid overload)
Key Concept Alert:
Abrupt cessation of chest tube drainage + ↑HR + increased filling pressure = CARDIAC TAMPONADE.
XIII. BOX 41.2 – Post-Cardiac Surgery Complications
• Tamponade
• Seizures
• Endocarditis
• Pneumothorax/pleural effusion
• Postperfusion syndrome
• HF
• Wound infection
• Arrhythmias
XIV. Medication-Specific Pearls (From Digoxin, Diuretics)
Digoxin Dosing Tip (Box 41.1):
• Usual safe dose: 10–15 mcg/kg/day in 2 doses
• Hold if HR <90 in infants, <70 in children
• Toxicity = vomiting, bradycardia, lethargy