Dilated coronary sinus on Echo

Anechoic, tubular structure in AV groove

Located posterior to mitral valve

Seen opening into right atrium

Diameter >1 cm indicates dilatation

Shows phasic venous flow on Doppler

Best seen in apical 4-chamber view

Suggests PLSVC association (persistent left superior vena cava)

#Echocardiography #CoronarySinus #PLSVC #CardiacImaging #Doppler #Radiology