Physiologic-insensitive left ventricular assist predisposes right-sided circulatory failure: a pilot simulation and...

Area of Science:

• Cardiovascular Physiology
• Medical Device Engineering
• Computational Biology

Background:

• Right-sided circulatory failure (RSCF) is a significant complication in 15-30% of patients with left ventricular assist devices (LVADs).
• The non-physiologic nature of current left ventricular support is hypothesized to contribute to RSCF.
• Understanding the interaction between LVAD support and right ventricular function is critical for patient outcomes.

Purpose of the Study:

• To investigate the impact of conventional, insensitive left ventricular assist device (LVAD) support on right-sided circulatory function.
• To explore the potential of feedback control strategies for LVADs to mitigate right-sided circulatory compromise.
• To propose a novel control concept for LVADs that preserves right-sided function while ensuring adequate peripheral perfusion.

Main Methods:

• Utilized an integrated computer simulation protocol to model cardiovascular dynamics.
• Performed experimental validation to confirm simulation findings.
• Developed and analyzed a feedback control concept for LVAD operation.

Main Results:

• Conventional, insensitive left ventricular assist device (LVAD) support was shown to compromise right-sided circulatory function.
• These compromised conditions may create a substrate for the development or progression of right-sided circulatory failure (RSCF).
• The proposed feedback control strategy demonstrated potential in addressing these issues.

Conclusions:

• Current left ventricular assist device (LVAD) technology, lacking physiologic feedback, can negatively impact right ventricular function.
• Implementing feedback control in LVADs offers a promising approach to prevent or manage right-sided circulatory failure (RSCF).
• A novel control concept aims to balance peripheral perfusion with the preservation of right-sided circulatory health.