Heart disease remains the leading cause of death in the United States, but doctors say many people don’t recognize the early warning signs until a major event happens.

Heart valve disease can start quietly, with symptoms you might just chalk up to getting older. However, health experts say catching it early can make a big difference.

Women are more likely to have autoimmune conditions like lupus or rheumatoid arthritis, which cause inflammation that can raise heart disease risk. They’re also more likely to suffer from depression, ...

Stiff-person syndrome is a rare autoimmune neurological disorder that causes muscle stiffness and painful spasms. Experts explain symptoms, triggers, diagnosis delays and treatment options.

A heart attack, also known as a myocardial infarction, occurs when part of the heart muscle does not receive enough blood.