hi benny,
so sorry to hear about your dad, hes in good hands now though and they will look after him and see hes alright, so try and not worry too much if you can.
my dad has a heart condition too, a high pulse rate/rapid heart beat, i think he has whats called atrial fibulation and ventrical fibulation.
we had some very scary times a couple of years ago with it, but now with mediacation tweaked and a defibulator fitted in his chest hes been fine since.
so id imagine they will do lots of tests on your dad and keep a constant eye on him, maybe keep him in for a couple of nights too and they will get him well again.
they will look after him benny, so try and not to worry - hard i know cus i know what its like as ive been there with my dad.
let us know how he gets on wont you.
take care :o)
and by the way, got your creme eggs yesterday, theyre lovely - thankseth! xx