Cardiac tamponade

Cardiac tamponade is a condition caused by too much fluid in the space between the heart and the sac that surrounds it, called the pericardium. This fluid collection can put weight and pressure on the heart, which means that it cannot expand properly and so it does not fill with normal amounts of blood. If the heart can't pump enough blood, it can lead to heart failure.

Cardiac tamponade is an emergency condition.