“…4,6,12 However, other sizable series have not encountered patients with hemodynamic instability after drainage, and some authors have questioned the existence of this entity. 7,[13][14][15][16] When reported, this phenomenon has been observed irrespective of the drainage approach, having been noted in patients undergoing subxiphoid pericardial window, window via thoracotomy, and pericardiocentesis. This phenomenon also appears to be independent of the underlying cause of the effusion, occurring in patients with malignant, infectious, and inflammatory effusions.…”