I've seen a few Facebook posts about how to survive a heart attack if your by yourself.
Some of my friends have been taken in by this long standing hoax that's been doing the rounds since about 2003.
I believe that the 'technique' has only been seen to have limited effect during a Cardiac Arrest (different to a Heart Attack) in a very small number of cases, under supervision in hospital.
The best thing you can do if you're by yourself is to make a 999 call, try to relax and maybe chew on an asprin until an ambulance or Community First Responder arrives.
Lets hope you never have to test the advice. Let me know if you have anything to add!
http://www.resus.org.uk/pages/coughCPR.htm
