κραδία δὲ φόβῳ φρένα λακτίζει → my heart knocks at my ribs
calmly: P. and V. ἡσυχῆ, ἡσύχως, Ar. and V. ἀτρέμα, Ar. and P. ἀτρέμας, ἠρέμα.