A life-threatening situation in which there is such
a large amount of fluid (usually blood) inside the pericardial sac around the heart
that it interferes with the performance of the heart. The end result, if untreated,
is low blood pressure, shock and death. The excess fluid in the pericardial sac
acts to compress and constrict the heart. The word "tamponade" is direct from the
French. The French verb "tamponner" means to plug up and, also, to smash into. Here
the outpouring of fluid within the pericardial sac is, so to speak, smashing into
the heart. Cardiac tamponade can be due to excessive pericardial fluid, a wound
to the heart, or rupture of the heart. Also called pericardial tamponade.
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