Directions to Cardiac & Vascular Imaging Center at UW Medical Medical Center, Northwest Campus: From I-5 northbound, take the 1st Ave NE, Exit #173 toward Northgate Way. Turn on to 1st Ave NE, heading North. Turn Left on to North Northgate way (cross under I-5). Turn Right on to Meridian Ave N. Turn Left on to N. 115th St..