Long left ventricular false tendons, which connect distant sites on. t
he ventricular endocardium, are common incidental echocardiographic fi
ndings. We describe two cases in which rapture of such long false tend
ons produced unusual, highly mobile, intracavitary echo densities that
could be mistaken for other important pathologies, such as thrombus o
r vegetation. The differentiation of ruptured long false tendons and i
ntact short apical false tendons from other entities they may mimic is
described.