https://zh.apacode.com/post/ms-wang-suddenly-screamed-during-labor-clutched-her-chest-tightly-and-couldnt-breathe-her-face-was-cyanotic-her-blood-pressure-dropped-and-her-fetal-heart-sound-dropped-to-55-60-beatsmin-which-of-the-following-is-most-likely-to-be-the-case