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Case report
Cardiac arrest in a healthy child due to paradoxical embolus across a previously unrecognised sinus venosus defect


A previously healthy, preadolescent female suffered an unwitnessed cardiac arrest with prompt return of circulation following bystander initiated resuscitation. Workup demonstrated the cause of her cardiac arrest to be distal left anterior descending coronary artery occlusion with small apical left ventricular transmural myocardial infarction, from a paradoxical embolus traversing a previously undiagnosed large sinus venous defect. This case demonstrates the value of cardiac magnetic resonance imaging may bring to the diagnosis of the pathophysiology leading to cardiac arrest.

  • medical management
  • cardiothoracic surgery
  • congenital disorders
  • cardiovascular medicine

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