part of part of in taxon physiological muscle hypertrophy cardiac muscle hypertrophy physiological cardiac muscle hypertrophy GO:0003301 dph The enlargement or overgrowth of all or part of the heart muscle due to an increase in size of cardiac muscle cells without cell division. This process contributes to the developmental growth of the heart. 2009-10-22T10:38:10Z cardiac muscle tissue growth Vertebrata <vertebrates>