Subaortal Membrane

A subaortic membrane is a thin, fibrous or fibromuscular tissue that forms below the aortic valve in the left ventricular outflow tract (LVOT). It is a cause of subaortic stenosis, a condition where this membrane partially obstructs blood flow from the left ventricle to the aorta.

The membrane can vary in appearance, ranging from a small, localized band to a more diffuse ridge of tissue. Over time, the increased pressure gradient caused by the obstruction can lead to left ventricular hypertrophy and damage to the aortic valve, potentially causing aortic regurgitation. Subaortic membrane is developed over the time due to abnormal hemodynamics caused by congenital heart defect.

Treatment typically involves surgical resection to remove the membrane and relieve the obstruction, especially in cases with significant symptoms, a high-pressure gradient, or progressive aortic valve involvement.

The model is composed of five .STL files composing this structure – aortic valve, coronary artery, left ventricle, mitral valve, subaortic membrane. It is important to notice that this structure is just small portion of heart, not the whole heart, demonstrating this anatomical feature. The structures are very small (up to 7,5 MB for aortic valve) and it is possible to use small 3D printer. Also, resin printer would work fine, as well.