Extracorporeal Membrane Oxygenation (ECMO) is an advanced form of temporary mechanical circulatory and respiratory support used in critically ill patients experiencing severe cardiac or pulmonary dysfunction. In structural heart interventions, particularly complex or high-risk transcatheter procedures, ECMO can provide essential hemodynamic support by maintaining systemic circulation and oxygen delivery when the heart is unable to adequately support the body's needs.

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Veno-arterial ECMO (VA-ECMO) is the primary configuration used for cardiovascular support during structural heart interventions. It works by removing deoxygenated blood from the venous circulation, passing it through an external membrane oxygenator, and returning oxygenated blood to the arterial system. This process provides temporary circulatory support and helps maintain adequate organ perfusion during periods of severe hemodynamic instability.

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ECMO may be utilized during high-risk structural heart procedures, including Transcatheter Aortic Valve Replacement (TAVR), transcatheter mitral and tricuspid valve interventions, and other complex catheter-based treatments. In select patients with severely compromised cardiac function, ECMO may be initiated electively before the procedure to provide additional hemodynamic stability. It may also be used emergently as a rescue strategy when life-threatening complications occur, such as cardiogenic shock, cardiac arrest, severe ventricular dysfunction, or acute procedural complications.

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The primary goal of ECMO during structural heart interventions is to provide temporary cardiopulmonary support, preserve end-organ perfusion, and allow the procedural team to safely manage periods of critical cardiovascular instability. Although ECMO is not routinely required for most transcatheter procedures, it can serve as a valuable supportive or lifesaving rescue strategy in carefully selected high-risk patients.

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As structural heart therapies continue to expand to patients with increasingly complex cardiac conditions, ECMO remains an important resource within comprehensive structural heart programs. Its availability allows multidisciplinary teams to manage challenging procedures and potentially improve outcomes in patients experiencing severe hemodynamic compromise.