The pathophysiology of is one in which the pericardial sac fills with blood to the point where the chambers of the heart no longer fill adequately, usually secondary to trauma.

The correct answer is : cardiac tamponade.

Explanation:

Cardiac tamponade is a medical condition in which heart has extreme compression or pressure due to the fluid or blood filled in the sac surrounding the heart and prevent the heart to fill properly.

IN other words it is case of extreme pressure on heart due to the fluids like blood collect inside the space present between the pericardial sac that leads ti inadequate filing of heart chambers.

It is caused by mainly by chest trauma, cancer, and chest related underlying disease or trauma.

Thus, the correct answer is : cardiac tamponade.

a physical change is being made.