Fig. 1
From: Diagnosis and treatment of congenital tricuspid valve malformation in a case of monozygotic twins
a The oblique four-chamber section of transthoracic echocardiography of Twin 1 shows that the septal lobe of the tricuspid valve moves downward to the apical part of the heart by transthoracic echocardiography, and the right ventricle inflow tract section by transthoracic echocardiography shows a large volume of tricuspid regurgitation by colour Doppler. b The oblique four-chamber section by transthoracic echocardiography of Twin 2 shows that the septal lobe of the tricuspid valve protrudes slightly into the right atrium during systole; the colour Doppler shows tricuspid regurgitation in the inflow section of the right ventricle by transthoracic echocardiography