Not enough information.
If your EJECTION FRACTION
is 35% you are in need of a major value replacement.
If that is your STROKE
VOLUME, it is 35 ml per beat and the normal is around 50-70 ml per beat. That means you need to start doing some medically supervised exercises.
If that is your OXYGEN SATURATION
, then you are dead.
If that is your CO2 SATURATION, that is way low for venous blood
and you may be having to hyperventilate to get enough oxygen. IE: Your lungs are darn near shot.
Pretty much anything I can think of that comes out as 35% is not good. You might ask your doctor for more details as to what he means.