A woven fabric (300, 400, 500, 620) for a low profile implantable medical device (600) includes a plurality of textile strands of a composite yarn (100, 200, 310, 410, 510, 622) aligned in a first direction interlaced with a plurality of textile strands of the composite yarn (100, 200, 320, 420, 520, 624) aligned in a second direction. The composite yarn includes a combination of a first material (112, 212) and a second material (114, 214). The textile strands have a size between about 10 denier to about 20 denier. The first material (112, 212) has at least one characteristic different from the second material (114, 214) and reacts favorably with blood when placed within an artery.
