 Under fluoroscopy via modified Seldinger technique, the left subclavian vein was punctured and a guidewire was passed through the vein into the superior vena cava, then the right atrium and then into the inferior vena cava. 
Under fluoroscopy via modified Seldinger technique , the left subclavian vein was punctured and a guidewire was passed through the vein into the superior vena cava , then the right atrium and then into the inferior vena cava .