Tăng áp động mạch phổi tồn lưu sau đóng shunt trái phải trong các bệnh tim bẩm sinh thường gặp ở trẻ em: tỷ lệ và các yếu tố nguy cơ

A retrospective study was performed on the medical recorded documents of 59 children who were diagnosed pulmonary artery hypertension associated with common left to right shunt congenital heart diseases and performed shunt closure surgically at Cho Ray hospital between January 2020 and May 2022. Systolic pulmonary artery pressure (PAPs) was measured via tricuspid regurgitation jet on transthoracic echocardiography (mode: continuous wave doppler, plane: apical 4-chamber). PH was defined as PAPs > 40mmHg. Postoperative PAPs was measured 1 day before discharge. Results: The median age and weight at surgery were 7 months (2 -2 1 5 ) and 5.9 kg (3.6 - 35), 59.3% was female. Preoperatively, 66.1% were mild PH, 33.9% moderate. Postoperatively, 10 patients (17%) diagnosed residual PH and all was mild. Among 10 patients with residual PH: 7 were combined defects (5 VSD-PDA. 2 VSD- ASD), 3 simple defects (2 VSD, 1 ASD). Preoperative high pulmonary pressure was associated with residual PH (correlation coefficient 0.116, p = 0.001). Conclusions. The proportion of patients with postoperatiovely residual PH is significant and most of these cases are combined shunt. Preoperative high pulmonary pressure is related to residual PH.