Hypoxemia complicating LVAD insertion: novel application of the Amplatzer PFO occlusion device

Area of Science:

• Cardiology
• Medical Devices
• Congenital Heart Defects

Background:

• Left ventricular assist devices (LVADs) are crucial for heart failure management.
• Interatrial shunting can complicate LVAD therapy, leading to paradoxical embolism and hypoxemia.
• Patent foramen ovale (PFO) and Chiari networks are known causes of right-to-left shunting.

Observation:

• A patient undergoing LVAD insertion developed profound systemic hypoxemia.
• The hypoxemia was attributed to right-to-left shunting through a PFO associated with a Chiari network.
• This shunt allowed deoxygenated blood to bypass the pulmonary circulation.

Findings:

• Successful management was achieved through percutaneous closure of the interatrial defect.
• An Amplatzer PFO occlusion device was used for the closure.
• Judicious reduction in LVAD flows also contributed to the patient's stabilization.

Implications:

• This case highlights the importance of screening for PFO in patients undergoing LVAD implantation.
• Percutaneous PFO closure is a viable strategy for managing hypoxemia caused by shunting during LVAD therapy.
• Understanding the interplay between cardiac devices and congenital anomalies is vital for patient outcomes.