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Figure 2: Fetal sonographic images during the procedure. (a) Intramuscular injection of anesthetic agent into the fetus. (b) Needle entry into the fetal thorax. (c) Needle alignment with the left ventricular outflow tract and wire across the aortic valve. (d) Inflated balloon across the aortic valve. AV: Aortic valve, Ba: Balloon, N: Needle, W: Wire

Figure 2: Fetal sonographic images during the procedure. (a) Intramuscular injection of anesthetic agent into the fetus. (b) Needle entry into the fetal thorax. (c) Needle alignment with the left ventricular outflow tract and wire across the aortic valve. (d) Inflated balloon across the aortic valve. AV: Aortic valve, Ba: Balloon, N: Needle, W: Wire