just been shouting the OP out to my wife who works in the NHS in a cardiology function.
she questions the quote of 'irregular heartbeat' was that what you were indicated? do you the have the ECG printout?
(NB. my wife makes sure i always bring mine back which she double checks and is often critical of lead placing - NukeHunt, apparantly the reason why you would have been showing an arrest is the placing of the leads too high up the chest.)
If the leades were the wrong way round, the complexes would have been reversed (yeah, its like swahili to me too !!) - i think thats what she described, so please excuse any errors in the relaying of information.
kalel if you want to PM me or have questions post away i'll get the wife to help you understand what is going on.