Quantification of the response of the right ventricle to the volume overload from asd and papvr

Methods We studied 33 patients (53 ± 17 yrs, male 33%); 19 (58%) with ASD, 12 (36%) with PAPVR, and 2 (6%) patient with a combination of both lesions. Patients were imaged at 1.5-Tesla using an 8-element, phased-array coil (GE Signa, EXCITE, GE Medical Systems, Milwaukee, Wisconsin, USA). Images were acquired with ECG gating and breath holding. Short axis images were acquired using a steadystate free precession pulse sequence (FIESTA) with the following parameters: TR/TE 3.3 ms/1.4 ms, 20 views per segment, FOV 35 × 35 cm, acquisition matrix 192 × 160, slice thickness 8 mm, slice gap 0 mm, flip angle 45 degrees, receive bandwidth 125 kHz. Left ventricular (LV) and RV volumes were determined by manual segmentation of the short axis images. The degree of RV volume overload was determined as the difference between RV and LV stroke volume. RV volumes were indexed to body surface area. from 13th Annual SCMR Scientific Sessions Phoenix, AZ, USA. 21-24 January 2010