A student who collapsed moments before a house fire was saved by her hero dog when the animal woke her up by licking her face and pulling at her jumper.
Melody Chen, 19, suffers from a rare heart condition and low blood sugar which causes her to pass out up to nine times a day.
She was diagnosed with Postural Orthostatic Tachycardia syndrome (PoTs) which means she can suddenly feel faint unless she eats.
