Document Classification

Section Type: RESULTS

Text: All 3 contrast agents significantly improved the mean quality grade (grades 0-5) of TR envelopes (Nat 1. 12, Sal 1. 97, Gel 2. 56, Lev 2. 41, P <. 001), decreased the number of uninterpretable envelopes (grade 0) (Nat 49 %, Sal 12 %, Gel 4 %, Lev 12 %, P <. 0001 for comparison of each agent relative to Nat), and improved the correlation between echocardiographic and catheter-derived RV-RA pressure measurements (Nat r = 0. 65, Sal r = 0. 75, Gel r = 0. 90, Lev r = 0. 88).