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 . <EOS>