Intera achieva 1.5 t nova dual

CMR was performed only in the group of rTOF using a whole-body 1.5 T MR scanner (Intera Achieva 1.5 T Nova Dual, Philips Medical Systems, Best, the Netherlands) with a five-channel cardiac coil. Cine imaging was obtained using a steady-state free precession sequence (echo time, 3.1 ms; repetition time, 1.5 ms; flip angle, 60℃; slice thickness, 10 mm; number of slices, 20; number of phases per 1 cardiac cycle, 20; field of view, 360 mm; matrix size, 192 × 192) . Two-dimensional phase contrast imaging was performed to quantify through-plane blood flow velocity and volume in the main pulmonary artery approximately 1-2 cm above the pulmonary valve.
Quantitative measurement of CMR data was performed using commercially available workstation (ZIO Station 2; Ziosoft, Tokyo, Japan). We measured RV enddiastolic volume, RV end-systolic volume, and RV ejection fraction (RVEF) by tracing RV endocardial in the end-diastolic and end-systolic frames of short axial slices. We also measured pulmonary regurgitant fraction (PRF) from flow time curve in the main pulmonary artery.

• PR interval prolongation is significantly correlated with right ventricular end-diastolic and end-systolic volume enlargement and lower right ventricular ejection fraction in patients with tetralogy of Fallot. • First-degree atrioventricular block and temporal prolongation of PR interval >2 ms/y are independent risk factors for lethal ventricular arrhythmias. Thus, more attention should be paid to the patients with PR interval prolongation.
ejection fraction, RV dimension, valve malfunction, and residual shunt were assessed by transthoracic echocardiography. RV dilatation was defined as an RV end-diastolic basal dimension >42 mm. 17 (link) Cardiac magnetic resonance (CMR) images were obtained at least once in 113 patients (64%) using the standard CMR protocols at our institution on a 1.5-T imager (Intera Achieva 1.5T Nova Dual; Philips Healthcare, Best, the Netherlands) with a 5-channel cardiac coil. Two reviewers, including one with 12-year experience of CMR imaging, evaluated CMR images through consensus reading. We traced the LV and RV endocardial contours in end-diastolic and end-systolic frames of stacks of shortaxis slices using workstation dedicated for CMR evaluation (CMR42; Circle Cardiovascular Imaging, Inc, Calgary, Canada), and measured RV end-diastolic volume, RV endsystolic volume, and RV ejection fraction.