The FDA has updated labels on the top two COVID-19 vaccines to warn of a rare heart side effect, mostly seen in young men.

Cardiac cirrhosis is one of several potential complications of heart failure or congenital heart disease. Learn about symptoms, diagnosis, treatment, and more.

Heart attacks occur when there is a lack of blood supply to the heart. Symptoms include: chest pain, pressure, or tightness; pain that may spread to arms, neck, jaw, or back ...