About ten years ago I was diagnosed with a heart murrmor. Last year I had this feeling of my heart beating in my neck..it was very fast and I also felt like what was a twitch. I was taken to my doctor and she said I was having tachacardia and admitted me immediately to the hospital I also had some stroke symptoms. They did all kinds of tests and I was told I have a mitral valve prolapse, but was not put on any medication. Today I was in a very stressful/threatening situation and I could feel my heart thumping very hard and fast in my neck. I was very shaky, and could not speak without stuttering (never had a stuttering problem) It took awhile for these symptoms to subside. Does anyone know if this sounds more like a panic attack or anxiety? I have been diagnosed before with severe post traumatic stress disorder. Is there a possibility it is a combination of things? Thanks for your help.