Dude, if someone is telling you that "Lisa" has had several several heart transplants, that someone is lying to you. She may have had multiple heart surgeries, but she has NOT had multiple transplants. Some very lucky people might get two; beyond that, it's not medically good practice. If two have failed (usually if ONE has failed) there's no medical reason to assume that another one will work. There aren't enough organ donations (think about what has to happen for a donor heart to come available) for them to keep giving multiple ones to the same person.
Not saying you're lying - saying someone is lying to you. But ain't NO WAY Lisa has had multiple transplants. Multiple surgeries, sure, that's possible. But I guarantee you that only one, a very, very slim chance of two, were transplants. Just doesn't happen.