Mechanical Mitral Valve Thrombosis in a Patient With Prior Nonbacterial Thrombotic Endocarditis

Figure 1. Mitral Valve Masses on Echocardiography Surgeon’s view of the mitral valve (MV) apparatus on 3-dimensional echocardiography showing a broad-based sheetlike mass accompanied by 3 filamentous masses (arrows) on the atrial surface of the MV. AV = aortic valve; LAA = left atrial appendage, LA = left atrium.

Figure 2. Mitral Valve Mass Histopathology Histology of the previous mitral valve mass confirming nonbacterial thrombotic endocarditis. (A) The mass has an irregular surface and a bland eosinophilic appearance (hematoxylin and eosin, 20×). (B) It is composed of fibrin and platelets with focal macrophages and lymphocytes (hematoxylin and eosin, 100×).

Figure 3. Transesophageal Echocardiography Post-Optimal Anticoagulation Transesophageal echocardiography showing complete resolution of the mechanical MV thrombi after 4 weeks of optimal anticoagulation. ANN = annulus; BL = bileaflet; other abbreviations as in Figure 1.