What is the survival rate of endocarditis caused by aspergillus?

Varies. Endocarditis is a very serious illness, and aspergillus induced endocarditis will likely be difficult to treat. Survivability always depends on preexisting health conditions, physical health, age, and cardiac function.
Not good. It really depends on many factors, such as the overall health of the patient, the degree of infection, and how early and aggressive therapy is. Mortality generally exceeds 50%.