Techniques for providing a replacement valve and transseptal communication

A method for use with a heart of a subject, comprising:

• identifying the subject as having mitral valve regurgitation;
• during a medical procedure, in response to identifying the subject as having mitral valve regurgitation, implanting a prosthetic valve at a mitral valve site of the heart;
• and
• during the same medical procedure, implanting a shunt at a septum of the heart, the shunt being shaped to define a lumen and including a membrane that regulates blood flow through the lumen, wherein:
• the membrane:
• has a closed position in which the membrane inhibits blood flow through the lumen, and an open position in which the inhibiting of the blood flow by the membrane is reduced,
• resides in the closed position while a blood pressure difference across the membrane is lower than a threshold blood pressure difference,
• moves from the closed position into the open position in response to the blood pressure difference exceeding the threshold blood pressure difference, and
• is configured such that the threshold blood pressure difference is 4-6 mmHg, and
• implanting the shunt that is shaped to define the lumen and includes the membrane comprises implanting the shunt that is shaped to define the lumen and includes the membrane that:
• has the closed position and the open position,
• resides in the closed position while the blood pressure difference across the membrane is lower than the threshold blood pressure difference,
• moves from the closed position into the open position in response to the blood pressure difference exceeding the threshold blood pressure difference, and
• is configured such that the threshold blood pressure difference is 4-6 mmHg.