Glossary entry (derived from question below)
Russian term or phrase:
в случае...летального исхода
English translation:
The risk is irreversible upon the development of a lethal outcome.
Russian term
Australia
www.sabletranslations.com
Native in: English (Variants: New Zealand, British, Australian) 
, Russian (Variant: Standard-Russia)
Works in: Russian to English, English, English to Russian
в случае...летального исхода
The second sentence doesn't make sense to me. Obviously the risk is irreversible if the person has died from this adverse effect. I'm not sure whether to translate it 'as is' or tell the client that this sentence is ridiculous.
Dec 5, 2021 13:10: Frank Szmulowicz, Ph. D. Created KOG entry
Proposed translations
United States
On time, on target, on budget.
Native in: English , Polish
Works in: Polish to English, English to Polish, Russian to Polish, and 1 more.
The risk is irreversible upon the development of a lethal outcome.
https://articlekz.com/en/article/25026
The development of adverse cardiac events was determined by the MACE scale criteria, which includes the development of a lethal outcome
https://www.iajps.com/pdf/july2018/118.IAJPS118072018.pdf
Canada
Life-saving precise translations
Native in: English (Variant: US) 
, Russian (Variant: Standard-Russia)
Works in: Russian to English, Ukrainian to English, English to Ukrainian, and 2 more.
The event is irreversible in case of death
Ukraine
Ukrainian and Russian medical linguist
Native in: Ukrainian (Variant: Standard-Ukraine) , Russian
Works in: English to Russian, English to Ukrainian, Russian to English, and 1 more.
Discussion