"Comparison of Transcatheter and Surgical Aortic Valve Replacement in Severe Aortic Stenosis"
JACC Jun 2013
http://content.onlinejacc.org/article.aspx?articleid=1685119 
"Conclusions  Patients randomized to either SAVR or TAVR experience enduring, significant reductions in transaortic gradients and increase in EOA. Compared with SAVR, TAVR patients had higher indexed EOA, lower prosthesis-patient mismatch, and more aortic regurgitation. Univariate predictors of death for the TAVR and SAVR groups differed and might allow future refinement in patient selection. "