hi,
here is my take on the situation:
i had a bad case of arrythmia 2 years ago where, after a couple of days of daily max statics the arrythmia lasted for 24 hours. i posted a thread here at the time and got some interesting replies. maybe you ant to check on it (
http://forums.deeperblue.net/showthr...8&goto=newpost)
from what i gathered it is not uncommon to have a short period of arrythmia after a max apnea, maybe 30sec to a minute. anything beyond that is not good. i had some standard medical checks done in the meantime with no indication of an ongoing problem.
since i have changed my routine completely (also with far better results

) i never had a problem. i believe 2 major contributing factors were inadequate rest and inadequate food. now i'm taking 2-3 days in between a max static session and i also pay a lot more attention to food and sleep.
if i remember correctly sam still said he had his best statics (around 10 min!) during a eriod of daily max statics over 6 weeks. and he was fasting. so there surely are a few other fators involved as well (apart from him being superhuman;-)).
cheers,
roland