Question: I have had lots of cardiac tests lately which came back clear – but I notice that my resting heart rate is going up. I am in my 40s and female and I was wondering if I need to get more tests ...

At eight years old, I had my third open-heart surgery — this time, to “tune up” my Fontan and implant my first pacemaker.

You glance at your heart rate monitor during a tough run and an unusually high number jumps out at you. Should you be excited or concerned?

Measured in milliseconds, a normal HRV for adults can range from below 20 to above 200, depending age, gender, and other ...

For years, the advice to expectant mothers was -- rest, stay calm, avoid exertion. Exercise during pregnancy was limited to ...