1. Paroxysmal postural dyspnea related to a left atrial ball thrombus
Daniel Grandmougin, MD, Thierry Letourneau, MD, Jean-Pierre Favre, MD, Xavier Barral, MD 
The Annals of Thoracic Surgery 
Volume 74, Issue 5, Pages (November 2002)
DOI: /S (02)

2. Fig 1
Transesophageal echocardiogram showing a free-floating ball-thrombus (BT, dotted line) approximately 4 cm in diameter (A) filling the left atrium (LA) and (B) rebounding off the mitral valve (MV) with a partial and intermittent protrusion through the annulus. (LV= left ventricle.)
The Annals of Thoracic Surgery  , DOI: ( /S (02) )

3. Fig 2
Operative view showing a complete, free, spherical, smooth mass located in the left atrium. Ball-thrombus after removal (inset).
The Annals of Thoracic Surgery  , DOI: ( /S (02) )