Qiqi Shi1, Yaping Shan1, Gang Chen1, Yaping Mi1, Hui Zhong1, Bing Jia1, Huifeng Zhang2. 1. Department of Cardiothoracic Surgery, Children's Hospital of Fudan University, Shanghai, China. 2. Department of Cardiothoracic Surgery, Children's Hospital of Fudan University, Shanghai, China. Electronic address: zhanghuifeng@fudan.edu.cn.
Abstract
BACKGROUND: Various conduits for right ventricular outflow tract reconstruction have been reported, but most of them are not available in China. The study investigators developed a simple handsewn valved conduit using expanded polytetrafluoroethylene (ePTFE). This study evaluated the midterm outcomes for this conduit. METHODS: This retrospective study included a total of 72 patients who underwent right ventricular outflow tract reconstruction with ePTFE valved conduits between January 2014 and June 2020. During follow-up, echocardiograms were performed for all patients, and magnetic resonance imaging was performed for patients with repaired tetralogy of Fallot. RESULTS: Patients had a median age of 69 months (interquartile range, 28-127 months) and a median follow-up period of 33 months (interquartile range, 9-51 months). There was no early death, but 2 late deaths (2.78%) occurred. The median conduit size was 18 mm (interquartile range, 18-20 mm) and the z score was +1.3 (interquartile range, +0.6-+2). Peak velocity across the ePTFE valve was 2.38 m/s (95% CI, 2.11-2.63 m/s). Pulmonary valve regurgitation was none or trivial in 27 (38.5%) patients, mild in 42 (60.0%) patients, and moderate in 1 (1.4%) patient. Conduit dysfunction occurred in 5 patients: 4 had moderate conduit stenosis, and 1 had moderate regurgitation. The right ventricular end-diastolic volume index in repaired tetralogy of Fallot was significantly decreased after surgery (171 mL/m2 vs 130 mL/m2; P < .001). No reintervention or conduit replacement was needed. CONCLUSIONS: This handsewn ePTFE valved conduit was associated with appreciable hemodynamic outcomes during the midterm follow-up period. Long-term follow-up studies are needed to corroborate these findings.
BACKGROUND: Various conduits for right ventricular outflow tract reconstruction have been reported, but most of them are not available in China. The study investigators developed a simple handsewn valved conduit using expanded polytetrafluoroethylene (ePTFE). This study evaluated the midterm outcomes for this conduit. METHODS: This retrospective study included a total of 72 patients who underwent right ventricular outflow tract reconstruction with ePTFE valved conduits between January 2014 and June 2020. During follow-up, echocardiograms were performed for all patients, and magnetic resonance imaging was performed for patients with repaired tetralogy of Fallot. RESULTS: Patients had a median age of 69 months (interquartile range, 28-127 months) and a median follow-up period of 33 months (interquartile range, 9-51 months). There was no early death, but 2 late deaths (2.78%) occurred. The median conduit size was 18 mm (interquartile range, 18-20 mm) and the z score was +1.3 (interquartile range, +0.6-+2). Peak velocity across the ePTFE valve was 2.38 m/s (95% CI, 2.11-2.63 m/s). Pulmonary valve regurgitation was none or trivial in 27 (38.5%) patients, mild in 42 (60.0%) patients, and moderate in 1 (1.4%) patient. Conduit dysfunction occurred in 5 patients: 4 had moderate conduit stenosis, and 1 had moderate regurgitation. The right ventricular end-diastolic volume index in repaired tetralogy of Fallot was significantly decreased after surgery (171 mL/m2 vs 130 mL/m2; P < .001). No reintervention or conduit replacement was needed. CONCLUSIONS: This handsewn ePTFE valved conduit was associated with appreciable hemodynamic outcomes during the midterm follow-up period. Long-term follow-up studies are needed to corroborate these findings.