Pericardial effusion means the build-up of too much fluid in the double-layered, saclike structure near one’s heart (pericardium). Pericardial effusion can lead to excess pressure on the heart, ...

Pericarditis is inflammation of the sac around the heart, called the pericardium. If pericarditis becomes chronic, it can lead to pericardial effusion. This is when the pericardium fills with fluid.

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

A 58-year-old woman presents to the hospital reporting fatigue, swelling of the legs and feet, and shortness of breath. She explains that her symptoms have been getting worse over the past 2 months.