An aortic aneurysm occurs when a weak aortic wall stretches, causing it to bulge. An aortic dissection occurs when there’s a tear in the aortic wall, which can be fatal if not treated immediately. The ...

Severe aortic stenosis is the final stage of aortic stenosis, which is the narrowing of the aortic valve. In severe aortic stenosis, symptoms can impair quality of life. Stenosis refers to a narrowing ...

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 ...

Certain types of aortic aneurysms have no symptoms unless they rupture, while others can cause pain or discomfort in the chest, abdomen, back, and elsewhere. An aortic aneurysm is an abnormal bulge in ...