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Small< 1 mm 300 ml
Moderate10-20 mm 500-700 ml
Large> 20 mm > 700 ml
Very Large> 30 mm + compression

SEQUENTIAL IMAGES OF PERICARDIAL EFFUSION – PSAX/2D

Changes in the size of a pericardial effusion can be best appreciated by recording similar images and displaying them in split-screen format. The effusion in this patient clearly diminishes over time.