A pacemaker is a small device that can send electrical signals to your heart. Here's who needs a pacemaker and how it works.

Mobitz type I, also known as the Wenckebach block, is a subtype of second-degree atrioventricular (AV) block. Mobitz type I is a type of conduction disorder, which happens when the electrical signals ...

Bradycardia, a slow resting heart rate, is healthy for elite athletes — but it can be dangerous if not caused by exercise ...

Dear Dr. Roach: I am an 84-year-old female in relatively good health. My doctor is concerned that my heart rate is too slow, consistently in the 50s. I have worn a Holter monitor and had an ...

Dear Reader: Your question reminded me of something that happened many years ago. A new patient came to my office. She told me that a colleague of mine had been her doctor, but she had stopped seeing ...