What is a first degree heart block?
A person with first degree heart block has a delay in the electrical impulse that travels through the heart. An electrical impulse stimulates the muscle fibers in the heart to contract. The impulse spreads through the heart in a very organized manner, so that the atria contract first, followed by the ventricles. First degree heart block causes a delay between the contraction of the atria, and the contraction of the ventricles.

What are the symptoms of a first degree heart block?
First degree heart block does not cause symptoms.

How does the doctor treat a first degree heart block?
In most cases, no treatment is necessary for first degree heart block. If a medication is causing the first degree heart block, the drug may be discontinued at the treating physician's discretion.