Right Ventricular Function in Patients With Left Ventricular Assist Device Support by Pulsatile Polvad MEV and...

Area of Science:

• Cardiology
• Medical Devices
• Heart Failure Management

Background:

• Left ventricular assist device (LVAD) support is crucial for advanced heart failure.
• The right ventricle (RV) is critical for LVAD support, but its response to different LVAD types is not well understood.
• Pulsatile and continuous-flow LVADs may have differential impacts on RV function.

Purpose of the Study:

• To compare the effects of pulsatile Polvad MEV (PM) versus continuous-flow Heartware (HW) or Heartmate II (HMII) left ventricular assist devices (LVADs) on right ventricular (RV) hemodynamic parameters.
• To evaluate RV function post-implantation in patients receiving different types of LVADs.

Main Methods:

• Retrospective review of 44 heart failure patients who received either PM (n=24) or HW/HMII (n=20) LVADs.
• Collected hemodynamic data included mean pulmonary artery pressure (mPAP), central venous pressure (CVP), cardiac output (CO), and cardiac index (CI).
• Calculated right ventricular work (RVW) using established hemodynamic parameters before and after LVAD implantation.

Main Results:

• While baseline characteristics were similar, patients with continuous-flow LVADs (group C) showed significantly higher cardiac output and index post-implantation compared to the pulsatile group (group P).
• Central venous pressure (CVP) was higher in group P, and post-implantation right ventricular work (RVW) was significantly higher in group C at multiple time points.
• Continuous-flow pumps demonstrated a more favorable hemodynamic profile for RV support.

Conclusions:

• Continuous-flow LVADs appear to optimize right ventricular function more effectively than pulsatile LVADs.
• This optimization may lead to better prevention of right ventricular failure or insufficiency in patients supported by continuous-flow devices.