Incidence, prognosis, and perinatal outcomes of and risk factors for severe twin–twin transfusion syndrome with right ventricular outflow tract obstruction in the recipient twin after fetoscopic laser photocoagulation

Table 3 List of severe twin-twin transfusion syndrome with recipient twin right ventricular outflow tract obstruction

	Quintero stage	GA at FLT (weeks)	PD	RVOTO regression after FLT	GA at delivery (weeks)	Live birth of RT	BW of RT (g)	intervention after delivery
1	IV	17.29	PA	no	17.86	no			PPROMs 4 days after FLT and abortion
2	I	20.71	PS	yes	32.71	yes	2390		No PS found after delivery
3	III	20.14	PS	no	27.29	no			Recipient IUFD after FLP
4	IV	19.86	PS	yes	35.71	yes	2690		No residual PS
5	II	19.0	PS	no	39.57	yes	2430	TBV	Mild PS after TBV
6	IV	17.43	PA	no	29.57	no			Recipient IUFD after FLP
7	IV	17.57	PS	no	36.57	yes			no residual PS
8	II	17.71	PS	no	37.29	yes	1580	TBV	Mild PS post TBV
9	IV	20.57	PS	yes	35.57	yes	2435		No PS found after delivery
10	II	17.14	PS	no	34.00	yes	1880	TBV
11	II	21.0	PS	no	35.86	yes	2430		Mild PS found after delivery, resolution 6 months later
12	IV	19.14	PS	no	36.86	yes	2105	TBV	residual mild PS after TBV
13	IV	16.14	PS	no	36.14	yes	2740	TBV	residual mild PS after TBV
14	II	25.43	no	no	27.43	yes	766		Mild PS found after delivery, resolution 3 months later

GA Gestational age, FLT Fetal laser therapy, PD Prenatal diagnosis, PA Pulmonary atresia, PA Pulmonary stenosis, RVOTO Right ventricular outflow tract obstruction, RT Recipient twin, BW Birth weight, IUFD Intrauterine fetal death, TBV Trans-catheter balloon valvularplasty, PPROMS Premature preterm rupture of membranes

ISSN: 1471-2393