Atrial Septal Defect (ASD)

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Last updated 7:24 AM on 8/25/26
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4 Terms

1
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What is an atrial septal defect (ASD)?

  • Hole between right and left atria

  • Persistent opening after birth

  • Usually causes:

    • Left → right shunt

  • Severe cases may reverse:

    • Right → left


2
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What symptoms can occur with a large/long-standing ASD?

  • Heart murmur

  • Exertional dyspnea

  • Fatigue

  • Peripheral/abdominal swelling

  • Palpitations

  • Frequent lung infections

  • Stroke

  • Cyanosis


3
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Why can small ASDs go unnoticed?

  • Small/moderate defects may produce:

    • No symptoms

    • Delayed symptoms

  • Symptoms may not appear until adulthood


4
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How is ASD treated?

  • Large/symptomatic defects require closure

  • Options:

    • Surgical closure

    • Catheter-based closure device