BACKGROUND: Low-pressure cardiac tamponade is a form of cardiac tamponade in which a comparatively low pericardial pressure results in cardiac compression because of low filling pressure.

Cardiac tamponade occurs when a pericardial effusion exerts a significant ... reflects a decrease in systolic blood pressure with inspiration of more than 12 mmHg. Pulsus paradoxus also occurs ...

This fluid build-up is called pericardial effusion ... common symptom of cardiac tamponade is pulsus paradoxus. This term refers to a dramatic drop in blood pressure that happens when you breathe ...

This hemodynamic effect of a large pericardial effusion causing cardiac tamponade is referred to ... only small changes in measured systolic blood pressure ― no more than 10 mm Hg.