Several months ago, I wrote several posts on the above subject and several members said that had the same problem. I went back to the US this summer, and told a cardiologist this and he did several tests, this pain can come from referred pain from heart problems. To make a long story short, I am now the proud new owner of a pace maker, the most advanced one on the market. I was on a plane 3 days after this surgery back to China. I am recovering well and slowly getting back to my TJ practice and working with my teacher in a local park.
Jet lag was a killer, and Korean Air is 5 star.
Best regards,
James