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.
Lauren Faust was inspired to create Rainbow Dash by her childhood toy G1 Pegasus pony Firefly. Rainbow Dash shares her name and color scheme with a fashionista Earth pony from G3 and G3.5, however, Faust gave her the personality of her favorite G1 pony, Firefly.