Samantha has a congenital heart defect called Hypoplastic Left Heart Syndrome.  To learn more, see her website.  She loves to pose for the camera and was not prompted to hold the stethoscope to her heart.
 

"Who Needs a Left Ventricle Anyway" won a very prestigious Second Place at the Best of 2000 competition at N4C.
 

Samantha's photo was chosen for the cover of the American Heart Associations's Annual Report (Western States Affiliate).