Is resting heart rate of 70 after being diagnosed with afib normal?

Yes. But be sure and know how well controlled your afib is overall. I have many patients who come to my office who have heart rates in the 70's or 80's at rest and seem fine but with the most minor of activity have heart rates that are wildly out of control. As your doctor about wearing a heart monitor home to see how well controlled you are in your daily life.