cardiomyopathic hearts from older animals exhibited backscatter values ( n = 500 sites ) averaging -50.87 +/- 0.22 db , again significantly different from values ( n = 300 sites ) in age-matched control hamsters ( -55.91 +/- 0.11 db ; p less than 0.001 ) .
C0878544
cardiomyopathic
C0018787
hearts