Pressure‐dimension index and left ventricular sphericity index following HeartMate II and HeartMate 3 implantation

Abstract Aims This study aimed to compare the changes in the left ventricle (LV) and right ventricle (RV) geometry and performance after the implantation of HeartMate II (HMII) and HeartMate 3 (HM3). In addition, we investigated whether the echocardiographic parameters LV sphericity index (LVSI) and the novel pressure‐dimension index (PDI) can predict post‐operative right ventricular failure (RVF). Methods and results Between 2012 and 2020, 46 patients [HMII (n = 22) and HM3 (n = 24)] met the study's criteria and had echocardiography tests pre‐operatively, 6 and 12 months post‐operatively. The LVSI and PDI were calculated together with the standard LV and RV echocardiographic parameters. The mean follow‐up was 24 ± 7 months. In both groups, the LV end‐diastolic diameter (LVEDD) significantly decreased 12 months post‐operatively compared with the pre‐operative values (HMII: 6.4 ± 1.4 cm vs. 5.7 ± 0.9 cm, P = 0.040; HM3: 6.7 ± 1.3 cm vs. 5.5 ± 0.9 cm, P