Echocardiographic Characteristics of cardiac blood cyst
All cases were single and 7 of them were less than 25mm in maximal
diameter. In these patients, transthoracic echocardiography revealed a
single balloon-like small cyst. The cyst had high tension, the wall was
thin and smooth, and calcification could be seen on the wall of the cyst
(fig.1). 4 of the cases were attached to the ventricular surface of the
anterior mitral leaflet and 1 was attached to the posteromedial
papillary muscles and chordae tendineae of the mitral valve. Of these 5
cases, 3 were located in the left ventricular outflow tract (fig.2), of
which only 1 resulted in mild obstruction of the LVOT (the maximum flow
velocity was 236cm/s, and the pressure gradient was 22mmHg). 2 were
attached to the septal leaflet of the tricuspid valve. The other one was
located on the tricuspid orifice and connected to the anterior tricuspid
valve annulus. The echocardiographic characteristics in this case are
atypical. The cyst was 54×31mm and attaches to the atrial surface of the
anterior tricuspid valve annulus. Severance and many hyperechogenic
masses with various sizes could be seen in the cyst. The wall of the
cyst is intact and the shape is regular. With the swing of the cardiac
cycle, the diastole reaches tricuspid valve orifice, and the systolic
return into the right atrium, resulting in the stenosis of the tricuspid
valve.