i have coranary heart disease and have 2 stents. my heart problems started 2003 when i started to have heaviness in my chest. i had 2 closed arteris. anyway, i awoke the other nite and my was having like throbbing (no pain) very fast on left side of my neck. at the same time i was having heart palpitatons. i did take a nitro and it did go away after a couple of min.