Scientists think that about 10 to 20% of SIDS cases are caused by inherited defects in the ion channels that help the heart squeeze out blood.
s aɪ ə n t ɪ s t s WORD_BOUNDARY θ ɪ ŋ k WORD_BOUNDARY ð æ t WORD_BOUNDARY ʌ b aʊ t WORD_BOUNDARY t ɛ n WORD_BOUNDARY t ə WORD_BOUNDARY t w ɛ n t i WORD_BOUNDARY p ə ɹ s ɛ n t WORD_BOUNDARY ʌ v WORD_BOUNDARY s ɪ d z WORD_BOUNDARY k eɪ s ɪ z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY k ɔ z d WORD_BOUNDARY b aɪ WORD_BOUNDARY ɪ n h ɛ ɹ ɪ t ɪ d WORD_BOUNDARY d iː f ɛ k t s WORD_BOUNDARY ɪ n ð ɪ WORD_BOUNDARY aɪ ɑ n WORD_BOUNDARY t̠ʃ æ n ə l z WORD_BOUNDARY ð æ t WORD_BOUNDARY h ɛ l p WORD_BOUNDARY ð ə WORD_BOUNDARY h ɑ ɹ t WORD_BOUNDARY s k w iː z WORD_BOUNDARY aʊ t WORD_BOUNDARY b l ʌ d WORD_BOUNDARY