At the time of autopsy of a 39-yrs-old woman who died of complications of SLE, several medium-sized vegetations are found on both sides of the mitral valve and tricuspid valve. Which of the following is the basic abnormality that produced these cardiac vegetations?
Turbulent blood flow through' an incompetent mitral valve Excess secretion of a vasoactive amine Presence of an anticardiolipin antibody Cachexia produced by a hypercoagulable state