PMID- 35466064 OWN - NLM STAT- MEDLINE DCOM- 20221122 LR - 20221122 IS - 1532-1932 (Electronic) IS - 1521-6934 (Linking) VI - 84 DP - 2022 Nov TI - Twin reverse arterial perfusion: Timing of intervention. PG - 127-142 LID - S1521-6934(22)00045-1 [pii] LID - 10.1016/j.bpobgyn.2022.03.006 [doi] AB - Twin reverse arterial perfusion (TRAP) sequence is a severe anomaly in monochorionic twins where one twin has profound corporeal underdevelopment and acardia. The normal "pump" co-twin provides blood flow to the acardiac twin through placental anastomoses which may lead to cardiac failure and pump twin demise as well as preterm delivery from severe polyhydramnios. Treatments include radiofrequency ablation, bipolar cord coagulation, and intrafetal laser with each aimed at occluding blood flow to the acardiac twin. However, none of these modalities has proven superior in terms of either pump twin survival or minimization of complications, including preterm premature rupture of membranes, preterm birth, or unexpected co-twin demise. The optimal timing of treatment is also unknown, without clear indications for intervention versus expectant management. Very early treatment of TRAP (i.e., <16 weeks) has been proposed to reduce first-trimester demise; however, this approach remains experimental. Further investigation is required to determine the best treatment and timing of intervention for TRAP. CI - Copyright (c) 2022. Published by Elsevier Ltd. FAU - Brock, Clifton O AU - Brock CO AD - Department of Obstetrics, Gynecology and Reproductive Services, University of Texas Health Science Center at Houston, United States; The Fetal Center at Children's Memorial Hermann Hospital, United States. FAU - Johnson, Anthony AU - Johnson A AD - Department of Obstetrics, Gynecology and Reproductive Services, University of Texas Health Science Center at Houston, United States; The Fetal Center at Children's Memorial Hermann Hospital, United States. Electronic address: anthony.johnson@uth.tmc.edu. LA - eng PT - Journal Article PT - Review DEP - 20220329 PL - Netherlands TA - Best Pract Res Clin Obstet Gynaecol JT - Best practice & research. Clinical obstetrics & gynaecology JID - 101121582 SB - IM MH - Pregnancy MH - Infant, Newborn MH - Female MH - Humans MH - Placenta MH - *Premature Birth MH - *Fetofetal Transfusion/surgery MH - Pregnancy Reduction, Multifetal MH - *Heart Defects, Congenital MH - Perfusion OTO - NOTNLM OT - Bipolar cord coagulation OT - Fetal surgery OT - Monochorionic twins OT - Radiofrequency ablation OT - Selective reduction OT - Twin reverse arterial perfusion sequence COIS- Declaration of competing interest The authors, Clifton Brock, MD and Anthony Johnson, DO have no conflicts of interest to reports. EDAT- 2022/04/26 06:00 MHDA- 2022/11/23 06:00 CRDT- 2022/04/25 05:58 PHST- 2022/02/02 00:00 [received] PHST- 2022/03/13 00:00 [accepted] PHST- 2022/04/26 06:00 [pubmed] PHST- 2022/11/23 06:00 [medline] PHST- 2022/04/25 05:58 [entrez] AID - S1521-6934(22)00045-1 [pii] AID - 10.1016/j.bpobgyn.2022.03.006 [doi] PST - ppublish SO - Best Pract Res Clin Obstet Gynaecol. 2022 Nov;84:127-142. doi: 10.1016/j.bpobgyn.2022.03.006. Epub 2022 Mar 29.