in an early stage ( 1 and 2 weeks of av-block ) when no or only a slight increase of cardiac muscle occurred , contractility measured from dp/dtmax at comparable load is elevated , while later ( 10 weeks of av-block ) when stable hypertrophy is present , contractility becomes again normal , in the hypertrophied heart a non-depressed cardiac performance and contractility and functional reserve was established from insitu experiments and from evaluations in the isolated heart .
C0027061
cardiac muscle
C0018787
heart