Analogue Mean Systemic Filling Pressure: a New Volume Management Approach During Percutaneous Left Ventricular Assist...

Area of Science:

• Cardiovascular Physiology
• Medical Device Engineering
• Translational Research

Background:

• Optimal fluid management for left ventricular assist devices (LVADs) lacks a gold standard.
• Mean systemic filling pressure (Pmsa) is a potential surrogate for circulatory pressure to assess volume status.

Purpose of the Study:

• To investigate the applicability of Pmsa for estimating volume status in LVAD patients.
• To determine if variable circulatory flows from temporary LVADs impact Pmsa measurements.

Main Methods:

• A translational interventional ovine study was conducted.
• Continuous flow LVAD (Impella CP) was used to induce variable circulatory flows.
• Pmsa was measured across different flow rates.

Main Results:

• Pmsa did not significantly change with variable circulatory flows induced by the LVAD.
• The average dynamic increase in Pmsa was 0.20 ± 0.95 mmHg (p = 0.68).
• This confirms the applicability of the human Pmsa equation in an ovine LVAD model.

Conclusions:

• Pmsa is a viable tool for estimating volume status in temporary LVAD patients.
• This finding supports future human and translational studies on LVAD fluid management.
• Opens new avenues for optimizing patient care with temporary mechanical circulatory support.