I have syncope and anemia. What could be the effects on getting Rhinoplasty?

Usually, these are conditions that would disqualify someone from have cosmetic surgery.  I am sure that your physician either knows or is looking into the cause of  your anemia and syncope.  Until these conditions are corrected, I would not recommend any type of cosmetic surgery, especially rhinoplasty.  While rare, the most common complication of rhinoplasty is bleeding.