A condition where blood accumulates in the pericardium, the membrane surrounding the heart.
From Greek 'haima' (blood) + 'peri' (around) + 'kardia' (heart). The term directly describes the anatomical situation: blood (unwanted) in the space around the heart.
Hematopericardium is a medical emergency that can happen after heart surgery or trauma—the blood pressing on the heart is like squeezing a sponge, preventing it from pumping effectively!
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