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Methods We reviewed CMR studies from September 2005 to April 2009 done at a tertiary medical center. First-pass perfusion imaging was performed on 1.5-T Signa CV/I scanners (GE Medical Systems) using a segmented echo-planar imaging pulse sequence with the following parameters: repetition time, 7.7 to 8.1 ms; echo time, 1.3 to 1.8 ms; echo train length, 4 to 8; matrix, 128 × 96; and each slice thickness, 15 mm. All perfusion images were obtained after an intravenous dose of 0.5-1.0 mmol/kg of Gd-DTPA at a rate of 3.0 ml/s in short axis plane only. PTT was calculated as the time difference from the first appearance of contrast in the LV to the first appearance of contrast in RV (Figures 1 and 2). DE done within 26 ± 4 days either pre or post CE-CMR was used as reference standard.

Peak pulmonary artery pressure may be determined by a multiple regression equation - a CE-CMR study