The interatrial shunt device (IASD) is a transcatheter interatrial shunt for treatment of heart failure with preserved or borderline reduced ejection fraction. It is proposed to decrease elevated left atrial pressure in patients with heart failure and preserved or borderline reduced ejection fraction. The device is implanted within the septum separating the two atrial chambers to create a permanent hole that allows continuous left-to-right shunting of blood flow.

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