IJCS | Volume 31, Nº6, November / December 2018

634 Table 1 - Clinical profile and comorbidities of the enrolled subjects Clinical variable Number of patients (% total) Female 31 (58.5%) NYHA I 3 (5.7%) NYHA II 27 (50.9%) NYHA III-IV 23 (43.4%) Systemic arterial hypertension 23 (43.4%) Atrial fibrilation 14 (26.4%) Tabagism 14 (26.4%) DM 5 (9.4%) Obesity (BMI > 30 kg/m²) 6 (11.3%) NYHA: New York Heart Association functional class; DM: diabetes mellitus. Figure 2 - (a,b) Right ventricular (RV) multi-beat, full-volume acquisition by three-dimensional echocardiography. (c,d) RV volumes and ejection fraction analysis using TomTec software. Rendering of RV chamber on the top (c), and volume-time curve and quantitative measurements on the bottom (d) Felix et al. RV function by 2D strain in left-sided valve disease Int J Cardiovasc Sci. 2018;31(6)630-642 Original Article Echocardiographic parameters Technically adequate measurements of TAPSE, PSV, FAC and 2DS parameters were obtained in all patients. Real-time 3DE images of the RV were successfully analyzed in 51 of the 53 patients evaluated (96.2%). Image quality was considered inadequate for analysis in two patients, due to unsatisfactory echocardiographic window (missing the anterior wall of the RV). Considering the entire study population, mean values of LV chamber dimensions were increased, despite normal LV systolic function. Overall, RV dimensions and function were normal, as summarized in Table 2. We compared conventional parameters of RV function and 2DS with RVEF measured by 3DE and found a significant correlation between RVFWS (r = -0.578; p < 0.001) and RVGS (r = -0.596; p < 0.001), very similar to FAC performance (r = 0.635; p < 0.001), and far better than TAPSE and PSV (Figure 3).