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Use "acardiac" in a sentence
"When blood flows in reverse through an acardiac twin (one without a functioning heart) as it is pumped by the other, typically normal twin."
"The term “reversed perfusion” is used to describe this scenario because blood enters the acardiac/acephalic twin through reversed flow through its umbilical artery and exits through the umbilical vein, which is opposite to the normal blood supply of the fetus."
"In the TRAP sequence, the acardiac/acephalic twin receives all of its blood supply from the normal, or so-called pump twin."