Growth of the Pulmonary Valve Annulus after the Modified Blalock-Taussig Shunt in Patients with Tetralogy of Fallot

Background: The surgical outcomes of tetralogy Fallot (TOF) have evolved dramatically and resulted in lower mortality rate. Currently, the many cardiac centers a trend to early single-stage complete repair more than staged repair. However, patients who an primary were required transannular patch augmentation pulmonary valve frequently. This effect has been developed chronic insufficiency may lead right ventricular dilation, dysfunction. In this era, aim treatment TOF is attempted preserve annulus for prevent dysfunction future. systemic artery shunt palliative procedure or known as symptomatic with TOF. modified Blalock-Taussig (mBTS) most useful perform initial before mBTS can provide increase blood flow well improve oxygenation also promote (PA) growth. growth still debate. Objectives: To compare between after (without atresia). Methods: A retrospective case-control study, review underwent total at our hospitals from January 2005 December 2017 was performed, number 112 Twenty-nine (26%) (mBTS group) 83 (74%) only (PR group). We evaluated diameter by using echocardiography time first diagnosis on both groups. Results: age group younger PR (p = 0.011). Therefore, annuls smaller group. (Z-score, −2.93 ± 1.42 vs. −1.89 0.97; p 0.001). potential significantly −1.46 1.02 −2.11 1.19; 0.009) Even though patent ductus arteriosus found commonly 0.018). Conclusions: Our results suggest