Paediatrics: Atrial Septal Defect: Free MSRA Podcast

⚕️ FREE MSRA PODCAST – Atrial Septal Defect (ASD)🎧 A clear, high-yield breakdown of this congenital hole between heart chambers – perfect for exam prep and real-life clinical scenarios.🧠 Key Learning Points📌 Definition• A congenital heart defect involving a hole in the atrial septum, allowing oxygenated blood to pass from the left atrium to the right atrium, creating a left-to-right shunt.📌 Causes & Risk Factors• Incomplete fusion of septum primum and septum secundum• Genetic conditions:Down syndrome (↑ risk of primum ASD)Holt-Oram, Noonan, Ellis-van Creveld syndromes• Environmental factors:Maternal diabetesSmoking or alcohol in pregnancyCongenital rubella infection🧠 Mnemonic: “SAD HOPES” – Smoking, Alcohol, Diabetes, Hereditary, Over 1st trimester infection, PFO, Environmental factors, Syndromes📌 Pathophysiology• Left atrium pressure > right atrium → blood shunts left to right• Causes volume overload on right heart• Leads to:Right atrial and ventricular enlargementIncreased pulmonary blood flowPulmonary hypertension if untreated📌 Symptoms• Often asymptomatic in infants• Large defects:Tachypnoea, poor feeding, failure to thriveRecurrent chest infections• In adults:Fatigue, dyspnoea, palpitationsAtrial arrhythmias (flutter/fibrillation)Peripheral oedema and cyanosis🧠 Mnemonic: “FLOWS BACK” – Fatigue, Lung signs, Oedema, Weakness, Split S2, Breathlessness, Arrhythmias, Cyanosis, Kids recurrent infections📌 Differential Diagnosis• Ventricular septal defect (VSD)• Patent ductus arteriosus (PDA)• Innocent murmur• Pulmonary stenosis• Atrioventricular septal defect (AVSD)📌 Diagnosis• Echocardiography (TTE or TOE) – main tool• ECG:Tall P waves (RA enlargement)Incomplete RBBBRight axis deviation• CXR:Cardiomegaly, ↑ pulmonary vasculature• MRI / Cardiac catheterisation – for detailed assessment🧠 Tip: “Echo to see the hole”📌 Management• Watchful waiting for small, asymptomatic ASDs• Medical: Diuretics if signs of heart failure• Closure options:Surgical repair (patch via open heart)Transcatheter closure (for suitable secundum ASDs)• No routine endocarditis prophylaxis for isolated ASDs post-repair• Treat associated arrhythmias (e.g., atrial fibrillation)📌 Complications• Pulmonary hypertension• Atrial arrhythmias (AF/flutter)• Paradoxical embolism → stroke• Right-sided heart failure• Rarely, infective endocarditis📌 Prognosis• Excellent if diagnosed and treated early• Surgical or device closure reduces risk of complications• Slight persistent risk of arrhythmias even post-repair• Untreated large ASDs: <5% survival beyond 50 years📎 More MSRA Resources for Atrial Septal Defect (ASD)📝 Revision Notes:https://www.passthemsra.com/topic/atrial-septal-defect-asd-revision-notes/🧠 Flashcards:https://www.passthemsra.com/topic/atrial-septal-defect-asd-flashcards/💬 Accordion Q&A Notes:https://www.passthemsra.com/topic/atrial-septal-defect-asd-accordion-qa-notes/🚀 Rapid Quiz:https://www.passthemsra.com/topic/atrial-septal-defect-asd-rapid-quiz/🎓 Full Course:https://www.passthemsra.com/courses/paediatrics-for-the-msra/#MSRA #MSRARevision #MSRATextbook #MSRAQuiz #MSRAQuestionBank #MSRAFlashcards #MSRAQandANotes #MSRAAccordions #MultiSpecialityRecruitmentAssessment #MSRAOnlineRevision #MSRARevisionWebsite #Paediatrics #AtrialSeptalDefectASD