Paediatrics: Tetralogy of Fallot: Free MSRA Podcast

⚕️ FREE MSRA PODCAST – Tetralogy of Fallot🎧 A clear, high-yield breakdown of this cyanotic congenital heart defect – perfect for exam prep and real-life paediatrics.🧠 Key Learning Points📌 Definition• Tetralogy of Fallot (TOF) is a congenital heart defect made up of 4 key abnormalities: – Ventricular septal defect (VSD) – Pulmonary stenosis (PS) – Overriding aorta – Right ventricular hypertrophy (RVH)📌 Causes & Risk Factors• Chromosomal abnormalities (e.g. 22q11 deletion, trisomy 21)• Maternal risk factors: smoking, alcohol, certain meds• Environmental exposures in utero🧠 Mnemonic: PROVe = Pulmonary stenosis, RVH, Overriding aorta, VSD📌 Pathophysiology• VSD allows mixing of oxygenated and deoxygenated blood• Pulmonary stenosis reduces blood flow to lungs• Overriding aorta receives mixed blood• RVH results from pressure overload due to PS➡️ Leads to right-to-left shunting and systemic cyanosis📌 Symptoms• Cyanosis (especially on crying or feeding)• “TET spells” – sudden hypoxic episodes• Poor feeding, failure to thrive• Clubbing (later stages), ejection systolic murmur🧠 Mnemonic: C-THRIVE = Cyanosis, TET spells, Harsh murmur, RV heave, Irritability, Very blue, Eating issues📌 Differential Diagnosis• Transposition of the great arteries (TGA)• Truncus arteriosus• Pulmonary atresia• Eisenmenger syndrome📌 Diagnosis• 🩻 CXR: Boot-shaped heart• 📈 ECG: RVH, right axis deviation• 🫀 Echo: Diagnostic gold standard – shows all 4 features• 🧪 Hyperoxia test: Low PaO₂ despite 100% O₂ suggests TOF📌 Management• Definitive: Surgical repair in infancy (VSD patch + PS relief)• Temporizing: Prostaglandin E1 for duct-dependent babies• BT shunt if not suitable for full repair initially• Manage TET spells: Knee-chest position, O₂, morphine, propranolol• Lifelong follow-up: Monitor for arrhythmias, valve dysfunction, RV failure📌 Complications• Arrhythmias (esp. VT), RV dysfunction• Pulmonary regurgitation• Residual defects (e.g. VSD, stenosis)• Neurodevelopmental delay• Infective endocarditis risk📌 Prognosis• Excellent with early surgery – most live active, full lives• Long-term follow-up vital due to risk of late complications📎 More MSRA Resources for Tetralogy of Fallot📝 Revision Notes:https://www.passthemsra.com/topic/tetralogy-of-fallot-revision-notes/🧠 Flashcards:https://www.passthemsra.com/topic/tetralogy-of-fallot-flashcards/💬 Accordion Q&A Notes:https://www.passthemsra.com/topic/tetralogy-of-fallot-accordion-qa-notes/🚀 Rapid Quiz:https://www.passthemsra.com/topic/tetralogy-of-fallot-rapid-quiz/🎓 Full Course:https://www.passthemsra.com/courses/paediatrics-for-the-msra/🧪 Extra Quiz:https://www.passthemsra.com/quizzes/tetralogy-of-fallot/#MSRA #MSRARevision #MSRATextbook #MSRAQuiz #MSRAQuestionBank #MSRAFlashcards #MSRAQandANotes #MSRAAccordions #MultiSpecialtyRecruitmentAssessment #MSRAOnlineRevision #Paediatrics #TetralogyOfFallot #TOF