Fibrilation or Fibrillation: How To spell?
The word Fibrilation is misspelled against Fibrillation, a noun meaning "The state of being reduced to fibers."
Fibrillation has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings fibri & ation which should not be misspelled with single 'L'
Wrong Spelling:  fibri-l-ation  Correct Spelling:  fibri-ll-ation 
Find more incorrect spellings of Fibrillation to spell right way.