. "\"Any process that stops, prevents, or reduces the frequency, rate or extent of cardiac muscle fiber development.\" [GOC:vk]" . . "negative regulation of cardiac muscle fiber development" . "down regulation of cardiac muscle fiber development" . "down-regulation of cardiac muscle fiber development" . "downregulation of cardiac muscle fiber development" . "negative regulation of cardiac muscle fibre development" . . . . "negative regulation of heart muscle fiber development" . "inhibition of cardiac muscle fiber development" .