<unk>  is a medical emergency resulting from the compression of the heart by accumulated fluid, pus, blood, or gas in the pericardial space.  The symptoms and signs of<unk>  depends on the etiology of the pericardial effusion and the rate of ﬂuid accumulation. Beck's triad is typical in acute<unk>  but is usually absent in subacute cases, where edema can be the primary presentation.  Low-pressure<unk>  occurs in patients with hypovolemia at diastolic pressures of 6 to 12 mm Hg and regional<unk>  occurs when there is a loculated effusion compressing a specific<unk>  chamber (often left side).  Echocardiography is the primary diagnostic modality of choice and the treatment of<unk>  is drainage of the pericardial fluid either by pericardiocentesis or surgical drainage.
Cardiac tamponade
Acute chest syndrome
Pneumopericardium
Myocardial rupture
Flail chest
Uremic pericarditis
Myopericarditis
Pericarditis