Sheath, catheter, and method of controlling radial orientation thereof

A navigable sheath comprising:

• an elongated body sized to traverse vasculature, defining a longitudinal axis, and comprising:
• an outer surface,
• a proximal end and a distal end disposed on opposite sides thereof, and
• a shaft extending distally from the proximal end to the distal end;
• an orientation lumen formed in the elongated body along the shaft and defining a curved path extending proximally from the distal end towards the proximal end and about the longitudinal axis, the elongated body being substantially rotationally fixable about an orientation insert disposed within the orientation lumen, the orientation insert attached to the distal end of the elongated body configured to deflect the distal end to form a curve;
• and
• a flexible circuit disposed on the outer surface of the elongated body, the elongated body being substantially rotationally fixed about the longitudinal axis relative to the orientation insert such that the flexible circuit is disposed toward an outer bend of the curve when the orientation insert deflects the distal end.