A sensor guide wire for an intravascular measurement of a physiological variable in a living body includes a sensor region in a distal part of the sensor guide wire, a sensor element arranged in the sensor region, a male connector at a proximal part of the sensor guide wire, a least one electrical micro-cable connecting the male connector to the sensor element, and an elongated guide wire body arranged between the sensor region and the male connector. The at least one electrical micro-cable extends essentially helically around the guide wire body along the length of at least a part of the guide wire.
