Intrauterine Adenosine Administration for the Treatment of Fetal Supraventricular Tachycardia in a Fetus With Aortic Stenosis

Figures

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  Figure 1. Initial echocardiogram at 25 weeks of gestational age Left ventricular outflow tract (LVOT) view demonstrating a dilated ascending aorta diameter measuring 7.99 mm, immediately distal to the LVOT at the initial echocardiogram at 25 weeks of gestation

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  Figure 2. Apical four-chamber and transverse view at 25 weeks of gestational age Apical four-chamber view (A) and transverse view (B) demonstrating an absence of ventricular hypertrophy, endocardial fibroelastosis (EFE), or pericardial effusion at the initial echocardiogram at 25 weeks of gestation

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  Figure 3. Doppler echocardiogram at 25 weeks of gestational age Pulsed wave Doppler demonstrating markedly increased pressures across the aortic valve with a maximum peak gradient of 53 mmHg and a mean of 32 mmHg (peak velocity: 3.6 m/s)

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  Figure 4. Echocardiogram at 32 and 6/7 weeks of gestation (A) LVOT view demonstrating turbulent blood flow through the narrowed aortic outflow tract. (B) Apical four-chamber view of the fetal heart minimal pericardial effusion measuring 4.2 mm on echocardiography performed at 32 and 6/7 weeks of gestation LVOT: left ventricular outflow tract

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  Figure 5. M-mode image at 32 and 6/7 weeks of gestation M-mode recording in SVT with 1:1 AV relation; fetal HR of 257 bpm seen at 32 and 6/7 weeks of gestation SVT, supraventricular tachycardia; AV, atrioventricular; HR, heart rate; bpm, beats per minute