Schi is right, it is Ramdevji. Yes, he taught us about Anulom-vilom and Kapalbhati. I am sorry, did not respond soon.
I think Kapalbhati is the one that helps me most. I had a headache after watching Bourne Ultimatum today (I do not get headaches usually)due to very fast moving pictures for a long time. I did Kapalbhati for just a few minutes and my headache disappeared.
I must say though, my reflux did not benefit from these breathing exercises, yet. First day it felt better and then it got normal. I get reflux every morning at 4:30 to 5am when I am most relaxed, my esophageal sphincter also relaxes and opens up.