A novel miniature ventricular assist device for hemodynamic support

Area of Science:

• Cardiovascular Science
• Biomedical Engineering
• Medical Devices

Background:

• Heart failure significantly impairs cardiac output and systemic hemodynamics.
• Current left ventricular assist devices (LVADs) often require complex implantation.
• Minimally invasive cardiac assist technologies are needed for peripheral support.

Purpose of the Study:

• To evaluate the efficacy of the 18 Fr HemoDynamics Systems enabler for left ventricular support.
• To assess the impact of the enabler on hemodynamic parameters in a sheep model of induced heart failure.

Main Methods:

• The 18 Fr enabler was implanted from the left ventricular apex to the ascending aorta in eight sheep.
• Mild, moderate, and severe heart failure were induced using coronary artery microsphere injection.
• Hemodynamic variables were measured before and after enabler activation at approximately 2.0 L/min flow.

Main Results:

• In moderate heart failure, cardiac output increased from 2.3 to 2.8 L/min (p < 0.01) and mean aortic pressure rose from 59 to 70 mm Hg (p < 0.01).
• Left atrial pressure decreased from 17 to 13 mm Hg (p < 0.05) in moderate heart failure.
• Significant hemodynamic improvements were observed across all induced heart failure severities.

Conclusions:

• The 18 Fr HemoDynamics Systems enabler effectively improved hemodynamics in a preclinical model of heart failure.
• The device demonstrates potential as a minimally invasive peripheral left ventricular assist option.
• Further research is warranted to explore the clinical applicability of this cardiac assist technology.