ABC | Volume 114, Nº2, February 2020

Original Article Ribeiro et al. Simplified method to assess diastolic function by CMR Arq Bras Cardiol. 2020; 114(2):284-292 Figure 3 – Displacement-versus-time plot in normal controls (A) and aortic valve disease patients (B). Error bars represent one standard deviation above and below the mean. AVD: aortic valve disease. A – Normal Controls Cardiac cycle (S) Cardiac cycle (S) B – AVD patients Mean Displacement (cm) Systole Diastole Systole Diastole 0,00 –0,02 –0,04 –0,06 –0,08 –0,10 –0,12 –0,14 –0,16 –0,18 0 –0,02 –0,04 –0,06 –0,08 –0,1 –0,12 –0,14 –0,16 –0,18 0 0.2 0.4 0.6 0.8 0 0.2 0.4 0.6 0.8 Figure 4 – Box plots of the variables of atrioventricular junction motion in patients with aortic valve disease and healthy volunteers. In both groups, the box plots display the sample minimum (lower whisker), lower quartile (lower box subdivision), median (horizontal band), upper quartile (upper box subdivision), and sample maximum (upper whisker) for each of the AVJ motion variables – maximum displacement (MD); maximum velocity early diastole (MVED); velocity diastasis (VDS) and VDS/MVED. Circles indicate outliers (p < 0.0001 for all) –0.05 –0.10 –0.15 –0.20 –0.25 2.0 1.5 1.0 0.5 0.0 0.8 0.6 0.4 0.2 0.0 1.25 1.00 0.75 0.50 0.25 0.00 p < 0.001 p < 0.001 p < 0.001 p < 0.001 Control Control AVD AVD Control Control AVD AVD VDS (s –1 ) VDS (s –1 ) MVED (s –1 ) MVED (s –1 ) MD MD (cm) VDS/MVED VDS/MVED ratio D Our study shows many advantages of using this new and accurate method for evaluation of LV diastolic function. It does not require the development of an acquisition sequence or post-processing software, and LV diastolic function can be easily evaluated by existing equipment. LV diastolic function can be retrospectively evaluated if prior cine image datasets were stored. Nonetheless, our study has several limitations. One of the most significant ones in terms of practicality is the need to performmanually 20 linear measurements in each phase of one cardiac cycle. However, the use of more automated software would help in a faster measurement. Another significant limitation was that AVJ motion and echocardiography variables were not directly correlated. It is possible that LV longitudinal 289