How To Reduce Short Temperedness In A Heart Patient?

my mom 64 years old. just has a stroke 6 mos. ago. she is doing well, and getting stronger. however, still cannot walk due to balance. the main problem, is her sudden RAGE! what can we do about it. its getting worst, and happens almost everyday. we don t know what to do. we take her out, and spend time with her. we have done everything as normal as possible.