PMC5241850_01
Fetal echocardiography images at 28 weeks of gestation: (a) Four-chamber view of fetal heart showing the mass with central echolucency seen at the atrioventricular junction above the anterior mitral leaflet (arrows), (b) same mass seen in relation to the aortic valve in the left ventricular outflow view in sagittal plane (arrows); RA: Right atrium, LA: Left atrium, RV: Right ventricle, LV: Left ventricle, AO: Aorta, spine-fetal spine, Left-left side of fetus
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F1
Fetal echocardiography showed a single nonpedunculated mass located at the atrioventricular junction close to the primum atrial septum and the anterior leaflet of mitral valve [Figure 1a]. The mass could be visualized adjacent to the aortic valve also, with the anterior tilt of the probe [Figure 1b].
Postnatal transthoracic echocardiography images: (a) Apical four chamber view showing the aneurysm (small arrows) seen between the atrioventricular junction and the anterior mitral leaflet (yellow arrow); the mouth of the aneurysm connecting to left ventricle shown in broad arrow. (b) Parasternal long axis view showing the relationship of the aneurysm (small arrows) to the aortic valve and anterior mitral leaflet. (c) Apical four chamber view showing color flow inside the aneurysm (star) communicating with the left ventricle. LA: Left atrium, LV: Left ventricle, RV: Right ventricle, AO: Aorta
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F2
Transthoracic echocardiography revealed an aneurysmal pouch located anteromedial to the anterior mitral leaflet, posterior to the aortic valve, and close to the interatrial septum and seen projecting into the left atrial cavity [Figure 2a and b]. It was communicating with the left ventricular cavity through a narrow mouth of 3 mm in diameter, which could be demonstrated by color Doppler assessment [Figure 2c].