When you have heart block, there is interference with the electrical signals that usually move from the top chambers of your heart to the bottom chambers, telling your heart when to beat. Read on to learn about causes, symptoms, and treatment.

Long QT syndrome can cause life-threatening rapid heart rhythms that can lead to fainting or sudden death.

Ventricular tachycardia is a fast, abnormal heart rate that starts in the lower chambers of the heart. It can become life-threatening if it lasts more than a few seconds. Here's what you need to know about this condition.

Getting enough folic acid can reduce the risk for neural tube defects (NTDs) and may also reduce the risk for other serious birth defects of the brain and spinal cord.

Managing headaches is especially tricky in the first trimester. This is a time when you should stay away from many medicines.

Wolff-Parkinson-White syndrome (WPW) is a type of abnormal heartbeat. If you have WPW, you may have episodes of tachycardia, when your heart beats very rapidly

Alagille syndrome is an inherited condition in which bile builds up in the liver because there are too few bile ducts to drain the bile. This results in liver damage.

Swallowing difficulties can happen for reasons ranging from dehydration to illness. Most cases are short-lived, but sometimes you might need medical treatment or special home care.

Insomnia is trouble falling to sleep or staying asleep. One in three adults has bouts of insomnia.

Sjögren Syndrome is an autoimmune disorder. This means that the body's own immune system attacks its own cells and tissues by mistake. In this case, it attacks the glands that make moisture. It commonly causes dry skin, dry eyes, and dry mouth.