Evidence map›Paper›PMID 41044489›Full record

ReviewBMC pregnancy and childbirth2025

Right ventricular outflow tract obstruction in recipient twins of twin-to-twin transfusion syndrome: 13 years of single-center data and literature review.

Yoo Jin Lee, Mi-Young Lee, Jae Yi Jeong, Jihye Koh, Jin Hoon Chung, Hye-Sung Won

Abstract readReview
In one paragraph

Review in BMC pregnancy and childbirth, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Yoo Jin LeeDepartment of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea.
Mi-Young LeeDepartment of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea. poptwinkle@hanmail.net.
Jae Yi JeongDepartment of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea.
Jihye KohDepartment of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea.
Jin Hoon ChungDepartment of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea.
Hye-Sung WonDepartment of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTo investigate the characteristics of right ventricular outflow tract obstruction (RVOTO) in recipient twins of twin-to-twin transfusion syndrome (TTTS), including its prevalence, perinatal outcomes, and the impact of fetoscopic laser coagulation (FLC) on postnatal RVOTO status.

methodsThis retrospective study included recipient twins of TTTS treated with FLC at the Asan Medical Center between January 2011 and December 2023. Among those diagnosed with RVOTO, the recipient twins were categorized into two groups based on postnatal outcomes: RVOTO improvement versus persistence. Prenatal ultrasound findings and neonatal outcomes were compared between the groups. To identify the predisposing factors for RVOTO, the entire recipient population was divided into RVOTO and non-RVOTO groups, followed by univariate and multivariable logistic regression analyses.

resultsAmong the 284 TTTS cases, 24 recipient twins (8.5%) were diagnosed with RVOTO. RVOTO improved following FLC in 7 cases (29.2%). In the remaining 17 cases with persistent RVOTO, six were stillbirths. In the 11 survivors, five had mild RVOTO and required no intervention, while six underwent intervention (four with balloon valvuloplasty and two with surgical correction). Multivariate analysis identified the initial Quintero stage (odds ratio [OR] 2.64), pulsatile umbilical vein (OR 3.44), and tricuspid regurgitation (OR 30.66) as significant independent risk factors for RVOTO.

conclusionsRVOTO is a relatively common cardiac complication in advanced TTTS. Timely FLC may lead to postnatal improvement. Serial ultrasound assessment is essential for early detection, risk stratification, and individualized counseling.

Indexed as

Fetofetal TransfusionFetoscopyVentricular Outflow ObstructionAdultFemaleHumansInfant, NewbornLaser CoagulationPregnancyRetrospective StudiesUltrasonography, PrenatalVentricular Outflow Obstruction, RightFetal echocardiographyFetoscopic laser coagulationRight ventricular outflow tract obstructionTwin-to-twin transfusion syndrome

Identifiers

PMID41044489
PMCPMC12495866

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.