An eavesdropper system (501, 601) comprising: an aortic pressure sensor (508, 608) configured to measure aortic blood pressure of an individual and provide a signal representing a measured aortic blood pressure value; an internal distal pressure sensor (509, 609) configured to measure distal blood pressure of the individual and to provide a signal representing a measured distal blood pressure value; a receiver (504, 604) configured to receive both a signal representing the measured aortic blood pressure value and a signal representing the measured distal blood pressure value, the receiver comprising a display configured to display data that is based on at least the measured aortic blood pressure value and the measured distal blood pressure value; wherein the system further comprises: a communication interface (507, 607) configured to be positioned along a wired aortic channel (503, 603) between said aortic pressure sensor (508, 608) and a monitoring device (505, 605), wherein said communication interface (507, 607) comprises a high impedance eavesdropping connection to said wired aortic channel (503, 603), and the communication interface (507, 607) is further configured to (i) eavesdrop via said eavesdropping connection on the signal representing the measured aortic blood pressure value sent over said wired aortic channel (503, 603) without altering the measured aortic blood pressure value, and (ii) send a signal representing the measured aortic blood pressure value to said receiver (504, 604) via a wireless connection between said communication interface (507, 607) and said receiver (504, 604) without altering the measured aortic blood pressure value. an aortic pressure sensor (508, 608) configured to measure aortic blood pressure of an individual and provide a signal representing a measured aortic blood pressure value; an internal distal pressure sensor (509, 609) configured to measure distal blood pressure of the individual and to provide a signal representing a measured distal blood pressure value; a receiver (504, 604) configured to receive both a signal representing the measured aortic blood pressure value and a signal representing the measured distal blood pressure value, the receiver comprising a display configured to display data that is based on at least the measured aortic blood pressure value and the measured distal blood pressure value; wherein the system further comprises: a communication interface (507, 607) configured to be positioned along a wired aortic channel (503, 603) between said aortic pressure sensor (508, 608) and a monitoring device (505, 605), wherein said communication interface (507, 607) comprises a high impedance eavesdropping connection to said wired aortic channel (503, 603), and the communication interface (507, 607) is further configured to (i) eavesdrop via said eavesdropping connection on the signal representing the measured aortic blood pressure value sent over said wired aortic channel (503, 603) without altering the measured aortic blood pressure value, and (ii) send a signal representing the measured aortic blood pressure value to said receiver (504, 604) via a wireless connection between said communication interface (507, 607) and said receiver (504, 604) without altering the measured aortic blood pressure value. a communication interface (507, 607) configured to be positioned along a wired aortic channel (503, 603) between said aortic pressure sensor (508, 608) and a monitoring device (505, 605), wherein said communication interface (507, 607) comprises a high impedance eavesdropping connection to said wired aortic channel (503, 603), and the communication interface (507, 607) is further configured to (i) eavesdrop via said eavesdropping connection on the signal representing the measured aortic blood pressure value sent over said wired aortic channel (503, 603) without altering the measured aortic blood pressure value, and (ii) send a signal representing the measured aortic blood pressure value to said receiver (504, 604) via a wireless connection between said communication interface (507, 607) and said receiver (504, 604) without altering the measured aortic blood pressure value.