What Causes Sudden Fainting?

Hello, I have a friend from Cornelia, Georgia who recently passed out in the tub and was told by her husband that he had to revive her by doing CPR because, according to him, she had no pulse. I ve told her to go to the doctor but unfortunately, she has no insurance and thus she has no doctor. what do you suggest she do? It s worth noting that her husband has no medical training whatsoever so I wouldn t be surprised if he was mistaken about the whole thing.That said,I really think she should get checked out just to be safe.