Ejection Fraction The Lower the Number, the Higher the Risk. Ejection fraction, or EF, is the percentage of blood that is pumped out of the heart during each beat. Doctors often use EF to determine how healthy your heart is and how well it is functioning as a pump. A low EF number is a serious health risk.
To really get your costume looking right, try to get an aqua-blue hooded sweatshirt, t-shirt, or tank-top to turn into your Rainbow Dash costume. You don't really need to do anything to the shirt to make a costume out of it, just make sure it's the right color. With your wig, it'll start looking a lot like Rainbow Dash.
Emma's Rainbow Dash look is inspired by Rainbow Dash, a character from the My Little Pony franchise and one of the main characters in My Little Pony: Friendship is Magic who appears in Equestria Girls! Rainbow Dash's human version possesses long, rainbow colored hair with bangs hanging in the right side of her face.