I am 51 now and when I was 23 I developed major anxiety from blackouts and tachocardia.At the time I didn't know that I had Tachocardia but found that according to the doctor was not a life threatening thing.I have lived with it over the the last almost 30 years and some cases have found that I still become anxious.Over the last six months I have really become anxious.Everytime you read the news or look online or talk to someone ...there is a mention of stroke and heart attack.I am acutely aware of all the symptoms of both and found that over the last 30 years I have experienced them all many times..Although now at 51 I am starting to take them a little more serious..as a matter of fact a lot more serious.I can't seem to take my mind off of them.I seem to be in good health and breath ok when walking or doing phyically exerting things and my heart rate and blood pressure seem to be fine.Lately though I have had some problem with hearing a pulse in my neck.not in my ears but in my neck..I have read many explinations of this being cartroid artery disease or blockage or tumor of the ear and many other things...It has gotten my attention big time but I keep seeing other people online that have had the samething I have for almost 12 and 15 years and had every test known to man and found nothing.I too have had in the last couple of months have had many of the stroke and heart symtoms ...not all at once but here and there..I have recently been to a doctor and he said everything looked good...so I found no reason to mention anything about my symptoms since at the time i wasn't bothered by them..The question I pose now here is if anxiety symptoms are so much like stroke or heart attack..how can you tell you are really having the real thing or just imagined illness simular to stroke or heart attack? I don't want to run to the doctor when I feel this way ,it just makes me more anxious..so what can you do to know? I also just read that men that experience depression or anxiety severly or at more risk and usually die of stroke or heart attack..How comforting huh?