My father aged 70 has been struggling with severe breathlessness and irregular heart beat. He has hf diagnosed and has a aicd implanted since 2015. Right now on vymada 100 twice dytor 5 once coralan 7.5 twice crevast gold once eptus 25 once. He also has ild diagnosed in nov since when he is on defcort 6 once and pirfenex 200 thrice. He was earlier having cordarone since 2015 and stopped taking since sept 2021 inline lung issues. Recently his acid has started showing vt ns and his breathlessness is getting severe. When tried to increase vymada to 200 and dytor to 10 his bp started going around 80/50 hence had to again switch to lower dose. Dr. is not recommending cordarone or any substitute even when vt ns are being recorded daily. Any suggestions on avoiding vt and helping with breathlessness.