extrasystolia in English dictionary extrasystolia Meanings and definitions of "extrasystolia" (medicine) An alteration in the rhythm of the heart due to extrasystoles. noun (medicine) An alteration in the rhythm of the heart due to extrasystoles. more Grammar and declension of extrasystolia extrasystolia ( plural extrasystolias) extrasystolia (plural extrasystolias) more Sample sentences with "extrasystolia" Declension Stem Try again Available translations Italian Authors