An introducer sheath assembly comprising: a handle portion including a front end and a rear end; a introducer sheath extending outwardly from the front end of the handle portion, the introducer sheath including, a device lumen configured to slidably receive a corresponding device, a guidewire lumen configured to slidably receive a corresponding guidewire, a first steering cable lumen, a second steering cable lumen, and a third steering cable lumen, and a first steering cable disposed in the first steering cable lumen, a second steering cable disposed in the second steering cable lumen, and a third steering cable disposed in the third steering cable lumen, characterized in that the first steering cable lumen, the second steering cable lumen, the third steering cable lumen and the guidewire lumen are disposed radially outwardly from the device lumen, and the third steering cable lumen, the device lumen and the guidewire lumen are symmetric about a vertical plane in which a longitudinal axis of the introducer sheath lies and further in that the introducer sheath assembly comprises: a first gear assembly disposed in the handle portion, a proximal end of the first steering cable being fixed to the first gear assembly; and a second gear assembly disposed in the handle portion, a proximal end of the second steering cable being fixed to the second gear assembly, wherein a distal end of the first steering cable and a distal end of the second steering cable are fixed to a distal end of the introducer sheath, and the second gear assembly rotates simultaneously with the first gear assembly. a handle portion including a front end and a rear end; a introducer sheath extending outwardly from the front end of the handle portion, the introducer sheath including, a device lumen configured to slidably receive a corresponding device, a guidewire lumen configured to slidably receive a corresponding guidewire, a first steering cable lumen, a second steering cable lumen, and a third steering cable lumen, and a first steering cable disposed in the first steering cable lumen, a second steering cable disposed in the second steering cable lumen, and a third steering cable disposed in the third steering cable lumen, characterized in that the first steering cable lumen, the second steering cable lumen, the third steering cable lumen and the guidewire lumen are disposed radially outwardly from the device lumen, and the third steering cable lumen, the device lumen and the guidewire lumen are symmetric about a vertical plane in which a longitudinal axis of the introducer sheath lies and further in that the introducer sheath assembly comprises: a first gear assembly disposed in the handle portion, a proximal end of the first steering cable being fixed to the first gear assembly; and a second gear assembly disposed in the handle portion, a proximal end of the second steering cable being fixed to the second gear assembly, a first gear assembly disposed in the handle portion, a proximal end of the first steering cable being fixed to the first gear assembly; and a second gear assembly disposed in the handle portion, a proximal end of the second steering cable being fixed to the second gear assembly, wherein a distal end of the first steering cable and a distal end of the second steering cable are fixed to a distal end of the introducer sheath, and the second gear assembly rotates simultaneously with the first gear assembly.