regulates regulates cardiac myofibril assembly regulation of cell development biological regulation regulation of actomyosin structure organization regulation of organelle assembly regulation of supramolecular fiber organization regulation of cardiac myofibril assembly Any process that modulates the frequency, rate or extent of cardiac myofibril assembly. biological_process regulation of cardiac myofibril development GO:1905304 regulation of cardiac myofibril morphogenesis 2016-07-06T10:01:49Z regulation of heart myofibril assembly