11. Postoperative pericardial effusion is also suspected to be the cause of atrial fibrillation. 12. The risk of pericardial valve thrombosis is exceedingly remote. 13. In some cases, conjoined twins have two hearts sheathed in one pericardial sac. 14. Radiotherapy is of some use in pericardial mesothelioma. 15. Electrical alternans with sinus tachycardia is a highly specific sign for large pericardial effusion. 16. The fluid build-up then causes pressure within the pericardial sac to increase. 17. Evidently the reno-pericardial opening is minute. 18. During 1986, Shiley made a substantial and original modification to the pericardial valve. 19. Retroperitoneal and pericardial ruptures are both possible. 20. Other tributaries include the bronchial veins, pericardial veins, and posterior right intercostal veins.
