Abstract Background Accessory mitral valve tissue is a rare congenital anomaly that is commonly diagnosed in early childhood and rarely in adulthood. It is usually asymptomatic. However. it may cause left ventricular outflow tract obstruction in a way that mimics various other causes of obstruction. https://www.ngetikin.com/great-pick-Borstlist-sjalvhaftande-Tesa-hot-grab/