What is the reason reversal blood flow twins fetals?
Answers
twin does the work of supplying blood for both twins. The twin supplying the blood is known as the "pump twin" and develops normally in the womb. However, the increased pumping of the heart puts this twin at risk for cardiac failure. The other twin — known as the "acardiac twin" — lacks a heart or has one that is not fully formed. It usually has a poorly developed body and may also be missing a head, limbs and torso.
Monochorionic Twin Pregnancies
Monochorionic twins are identical twins who share a placenta (afterbirth) and a network of blood vessels that supply oxygen and nutrients essential for development in the womb. TRAP occurs in about 1 percent of monochorionic pregnancies or 1 in every 35,000 pregnancies.
What causes twin reversed arterial perfusion?
With TRAP, it is believed that very early in pregnancy, a dramatic, ongoing fluctuation of blood pressure and blood flow may interfere with the development of the heart in the acardiac twin. Though the pump twin’s heart may go on to develop properly, the vessel connections between the twins can create problems. In cases of TRAP, the blood from the healthy pump twin flows backwards from the placenta into the unhealthy acardiac twin. Because the acardiac twin lacks a functional heart, it is unable to reciprocate and provide the forward flow of blood found in a normal fetal circulatory system.
Answer:When there is an “acardiac twin”, the unique vascular connections allow blood in the artery to flow in the reversed direction (toward the acardiac fetus rather than away from it). ... As such, the normal twin's heart has to work extra hard and is under a lot of stress. This can result in heart failure for the normal twin.
Explanation: