pericardial

例句：

1. 1.The heart's pericardial sac is where the heart sits inside thechest cavity.
   心脏的心肌位于胸腔内。
2. 2.The pericardial effusion cancause swelling in the chest and abdomen.
   心包积液会导致胸部和腹部肿胀。
3. 3. The patient was diagnosed with pericardial constriction, which requiressurgery to relieve pressure.
   患者被诊断出心包缩窄，需要手术来缓解压力。