X-ray of an acardiac fetus<unk>  sequence, also called<unk>  sequence,<unk> S, or acardiac<unk> ning, is a rare complication of monochorionic<unk>  pregnancies. It is a severe variant of<unk> -to-twin transfusion syndrome (TTTS). In addition to the<unk> s' blood systems being connected instead of independent, one<unk> , called the acardiac<unk> ,<unk>  fetus or acardius, is severely malformed. The heart is missing or deformed, hence the name "acardiac", as are the upper structures of the body. The legs may be partially present or missing, and internal structures of the torso are often poorly formed. The other<unk>  is usually normal in appearance. The normal<unk> , called the pump<unk> , drives blood through both fetuses. It is called<unk><unk><unk> " because in the acardiac<unk>  the blood flows in a<unk>  direction.<unk>  sequence occurs in 1% of monochorionic<unk>  pregnancies and 1 in 35,000 pregnancies overall.
Twin reversed arterial perfusion
Local gigantism
Ventricular escape beat
Collapsing pulse
Junctional escape beat
No reflow phenomenon
Hyperdynamic circulation
Return of spontaneous circulation