Short-Term Ventricular Structural Changes Following Left Ventricular Assist Device Implantation

Area of Science:

• Cardiology
• Medical Imaging
• Mechanical Circulatory Support

Background:

• Left ventricular assist device (LVAD) implantation is known to induce reverse remodeling in the left ventricle.
• Comprehensive analysis of both left ventricular (LV) and right ventricular (RV) volumetric and shape changes following LVAD implantation is lacking.

Purpose of the Study:

• To prospectively evaluate LV and RV volumetric and shape modifications after LVAD implantation using 2D and 3D echocardiography.
• To assess reverse remodeling in both ventricles post-LVAD implantation.

Main Methods:

• Prospective enrollment of LVAD candidates.
• Acquisition of 2D and 3D echocardiographic images before and after LVAD implantation (1-2 months).
• Analysis of 3D endocardial surfaces for LV sphericity, conicity, and RV septal/free-wall curvatures.

Main Results:

• LV end-diastolic volume significantly decreased post-LVAD (461±182 to 287±144 ml).
• LV sphericity and conicity improved significantly, indicating favorable reverse remodeling.
• RV end-diastolic volume showed no significant change, and RV longitudinal strain worsened post-LVAD (-9.1±3.1% to -5.9±2.6%).

Conclusions:

• LVAD implantation leads to significant reverse remodeling of the left ventricle, characterized by reduced volumes and improved shape.
• The right ventricle does not exhibit reverse remodeling post-LVAD, with unchanged shape and worsened longitudinal strain.