What is described is an apparatus for intravascular pressure measurement, comprising an elongate body and a first pressure sensor. The elongate body includes a proximal portion and a distal portion, the body defines a distal guidewire lumen extending adjacent a sensor assembly along a distal portion of the system. The first pressure sensor is disposed within the wall of the distal portion of the body. An exterior surface of the sensor and the outer surface of the body are substantially aligned.
