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It is difficult to assess life expectancy in an individual instance. It depends upon several factors – Ejection Fraction
is just one of them... Sorry to say that 10% is rather low and means a few months but there are other factors - valves’ integrity and function / wall of the chambers / arrhythmia
, their nature and frequency / kidney
and lung function, other co-morbidities / response to medicines ...and so on...
The treating doctor alone can suggest based on his assessment of the situation.
Wishing speedy recovery