Pericardial defect

•Congenital (0.002~0.044%)
•Partial > Complete
•Associate with VSD, PDA, MS, TOF…
•Partial absence
– Herniation of LA appendage or LV ➔ fatal myocardial strangulation

•Imaging findings
– Leftward displacement of the heart (more common in complete absence)
– Prominent PA and interposed lung tissue
➔ radiolucent zone btw MPA and the aorta
– Partial prominence of left heart  border
– Accentuate in the left lateral position

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