A curve forming stent graft for curved vessels such as the thoracic arch. The stent graft has a tubular body zig zag self expanding stents fastened to and supporting the tubular body. The zig zag self expanding stents comprising struts and points between adjacent struts thereby defining proximal end...http://www.google.ca/patents/US8118855?utm_source=gb-gplus-sharePatent US8118855 - Curve forming stent graft