thats a very good and important question, that 9/10 cardiologist will not be able to answer properly.
there are many more things we need to know to answer this.
1. did she have sudden onset first episode of dyspnoea or its a long standing process
2. did she have any assiciated chest pain
3. whats the troponin levels( thats a blood test which must have been done)
4. whats her LVEF on echo.
Next Steps
remember there may be blockages in her heart, but by opening those blockages she will improve is a matter of debate in medical science.
stress test is required to determine that.