“…10 Plain radiography has also proven misleading, with normal findings documented even in the presence of cardiac rupture. 3,15 Although the use of urgent echocardiography has been described, 12,15,17,21,22 formal echocardiography is often not rapidly available. The successful use of invasive diagnostic techniques, such as pericardiocentesis 6,17 and emergent subxiphoid window, 3,9 has also been described in previous series.…”