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.
Rainbow Dash is a female Pegasus pony and one of the main characters in My Little Pony Friendship is Magic. She maintains the weather and clears the skies in Ponyville. As a huge fan of the Wonderbolts, she becomes a reservist member of the elite flying group in Testing Testing 1, 2, 3 and a full member in Newbie Dash.