Lindsay R Freud1, Doff B McElhinney2, Audrey C Marshall2, Gerald R Marx2, Kevin G Friedman2, Pedro J del Nido2, Sitaram M Emani2, Terra Lafranchi2, Virginia Silva2, Louise E Wilkins-Haug2, Carol B Benson2, James E Lock2, Wayne Tworetzky2. 1. From the Departments of Cardiology (L.R.F., D.B.M., A.C.M., G.R.M., K.G.F., T.L., J.E.L., W.T.) and Cardiac Surgery (P.J.d.N., S.M.E.), Boston Children's Hospital, Boston, MA; and the Departments of Obstetrics and Gynecology (V.S., L.E.W.-H.) and Radiology (C.B.B.), Brigham and Women's Hospital; Harvard Medical School, Boston, MA. lindsay.freud@cardio.chboston.org. 2. From the Departments of Cardiology (L.R.F., D.B.M., A.C.M., G.R.M., K.G.F., T.L., J.E.L., W.T.) and Cardiac Surgery (P.J.d.N., S.M.E.), Boston Children's Hospital, Boston, MA; and the Departments of Obstetrics and Gynecology (V.S., L.E.W.-H.) and Radiology (C.B.B.), Brigham and Women's Hospital; Harvard Medical School, Boston, MA.
Abstract
BACKGROUND: Fetal aortic valvuloplasty can be performed for severe midgestation aortic stenosis in an attempt to prevent progression to hypoplastic left heart syndrome (HLHS). A subset of patients has achieved a biventricular (BV) circulation after fetal aortic valvuloplasty. The postnatal outcomes and survival of the BV patients, in comparison with those managed as HLHS, have not been reported. METHODS AND RESULTS: We included 100 patients who underwent fetal aortic valvuloplasty for severe midgestation aortic stenosis with evolving HLHS from March 2000 to January 2013. Patients were categorized based on postnatal management as BV or HLHS. Clinical records were reviewed. Eighty-eight fetuses were live-born, and 38 had a BV circulation (31 from birth, 7 converted after initial univentricular palliation). Left-sided structures, namely aortic and mitral valve sizes and left ventricular volume, were significantly larger in the BV group at the time of birth (P<0.01). After a median follow-up of 5.4 years, freedom from cardiac death among all BV patients was 96±4% at 5 years and 84±12% at 10 years, which was better than HLHS patients (log-rank P=0.04). There was no cardiac mortality in patients with a BV circulation from birth. All but 1 of the BV patients required postnatal intervention; 42% underwent aortic or mitral valve replacement. On the most recent echocardiogram, the median left ventricular end-diastolic volume z score was +1.7 (range, -1.3 to +8.2), and 80% had normal ejection fraction. CONCLUSIONS: Short- and intermediate-term survival among patients who underwent fetal aortic valvuloplasty and achieved a BV circulation postnatally is encouraging. However, morbidity still exists, and ongoing assessment is warranted.
BACKGROUND:Fetal aortic valvuloplasty can be performed for severe midgestation aortic stenosis in an attempt to prevent progression to hypoplastic left heart syndrome (HLHS). A subset of patients has achieved a biventricular (BV) circulation after fetal aortic valvuloplasty. The postnatal outcomes and survival of the BVpatients, in comparison with those managed as HLHS, have not been reported. METHODS AND RESULTS: We included 100 patients who underwent fetal aortic valvuloplasty for severe midgestation aortic stenosis with evolving HLHS from March 2000 to January 2013. Patients were categorized based on postnatal management as BV or HLHS. Clinical records were reviewed. Eighty-eight fetuses were live-born, and 38 had a BV circulation (31 from birth, 7 converted after initial univentricular palliation). Left-sided structures, namely aortic and mitral valve sizes and left ventricular volume, were significantly larger in the BV group at the time of birth (P<0.01). After a median follow-up of 5.4 years, freedom from cardiac death among all BVpatients was 96±4% at 5 years and 84±12% at 10 years, which was better than HLHSpatients (log-rank P=0.04). There was no cardiac mortality in patients with a BV circulation from birth. All but 1 of the BVpatients required postnatal intervention; 42% underwent aortic or mitral valve replacement. On the most recent echocardiogram, the median left ventricular end-diastolic volume z score was +1.7 (range, -1.3 to +8.2), and 80% had normal ejection fraction. CONCLUSIONS: Short- and intermediate-term survival among patients who underwent fetal aortic valvuloplasty and achieved a BV circulation postnatally is encouraging. However, morbidity still exists, and ongoing assessment is warranted.
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