Fiona has been diagnosed with bulimia nervosa. based on the physical symptoms listed in your text, you should expect that fiona will show evidence of

Fiona will most probably show evidence of dental problems and cardiac arrhythmias.

Bulimia nervosa is an eating disorder affecting nearly 1% of women worldwide. People suffering from this disorder exhibit binge eating which is followed by purging. Some common symptoms caused by this disorder are dental problems, including the erosion of teeth's enamel and heart arrhythmias caused by electrolyte imbalance. 

Abay where the river empties into the sea