Hey Grignard I gotta tell ya...I don't think you're going to get any answer to your question on this forum. People interested in applying to UPitt MD/PhD probably aren't going due to their interests in liver transplants. Instead, they are rather going due to their basic science research interests (and in most cases this does not include clinically-related cardiology). I'm not personally sure which basic science departments are the most well-regarded at Pitt, but I would guess that its overall "ranking" is a result of the high level of funding, excellent faculty, and overall reputation among other medical schools that it holds (as well as the other whims, biases, and fancies that U.S. News happens to hold as khan mentions). If you are really interested in the science, you can check out publication records of faculty there or ask faculty you know at your school what they think of Pitt's particular programs. If you are interested in things like cardiology, you should probably check out residency rankings.