24. Left atrial ball thrombus

Page created on November 12, 2018. Last updated on January 17, 2019 at 16:23

Organ: Heart


An opened left atrium is visible. Inside there is a huge thrombus stuck to the atrial wall.

Diagnosis: Large atrial thrombus


  • Virchow’s triad
    • Endothelial damage
    • Abnormal blood flow
    • Hypercoagulability
  • Especially atrial fibrillation


Atrial fibrillation causes turbulence inside the atria, which promotes thrombus formation.

A thrombus in the atria can either obstruct the mitral valve or become a systemic embolus.

Thrombus formation in the atria isn’t too common, it’s more commonly found in the auricle.

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