When the pericardium fills with blood, it produces a condition called cardiac tamponade, which can be rapidly lethal. why is this condition so dangerous?

Answer;

The fibrous pericardium is not distensible, which causes the blood to put pressure on the heart, constricting it and reducing its ability to contract

Explanation;

-Cardiac tamponade is a clinical syndrome caused by the accumulation of fluid in the pericardial space, resulting in reduced ventricular filling and subsequent hemodynamic compromise.

-The most common causes of cardiac tamponade are; rupture of an aortic aneurysm (a bulge in the wall of the aorta), advanced lung cancer, acute pericarditis (inflammation of the pericardium), a heart attack, and heart surgery.