Imaging trying to walk through concrete. Every step becomes more difficult as the concrete hardens and your legs turn from stiff to rigid. That's how organizers of Hill Country Memorial's heart screening program "SCORE" describe a rare congenital heart condition called hypertrophic cardiomyopathy, a stiffening of the heart muscle that traps blood in the heart and can lead to an abnormal cardiac rhythm. Every year a handful of Texas teenagers, some exhibiting no symptoms, die suddenly due to hyp ...