Answer:
yes if you have a weak heart or A-fib, wassaby could seriously harm you. if you are not that good with spicy foods, you'll notice that every time you eat something spicy your heart beats will increase. and yes depending how your body handles spicy tastes and how solid is you heart you might or might not make it... at least if not die seriously injure yourself or faint, etc... all depends on lots of factors
to answer your question: possibly? yes. most likely? not