Extracorporeal membrane oxygenation support in acardia

Area of Science:

• Cardiovascular Surgery
• Medical Devices
• Transplantation Medicine

Background:

• Heart preservation is not always possible in critical scenarios like hyperacute transplant rejection or severe trauma.
• A need exists for temporary circulatory support when the heart must be explanted.

Purpose of the Study:

• To evaluate the feasibility of peripheral extracorporeal membrane oxygenation (ECMO) support in acardiac animal models.
• To assess ECMO as a bridge to heart transplantation or artificial heart implantation.

Main Methods:

• Extracorporeal membrane oxygenation (ECMO) was established in five calves via transjugular insertion of a cannula into the caval axis.
• The heart was excised after inducing ventricular fibrillation and clamping great arteries.
• The pulmonary artery was clamped and anastomosed with the caval axis for 6 hours of monitoring.

Main Results:

• Pulmonary artery anastomosis to the caval axis ensured acceptable hemodynamic stability for 6 hours.
• Peripheral access ECMO support was demonstrated in a model of complete heart explantation.
• This approach provides a viable option for temporary circulatory support.

Conclusions:

• Peripheral ECMO support is a feasible strategy for maintaining hemodynamic stability after heart explantation.
• This method can serve as a crucial bridge in extreme scenarios requiring immediate heart replacement.