FRAMINGHAM, Mass. and SYDNEY, April 23 /PRNewswire-FirstCall/ -- HeartWare International, Inc. (Nasdaq: HTWR; ASX: HIN), a leading innovator of less invasive, miniaturized circulatory support technologies revolutionizing the treatment of advanced heart failure, today announced that data from its international clinical trial and commercial experience of the HeartWare® Ventricular Assist System showed a survival rate of 90 percent at six months and an actuarial survival rate of 86 percent at 12 months post implant. The results were presented by Martin Strueber, M.D., cardiothoracic surgeon at Hannover Medical School, at the annual meeting of the International Society for Heart and Lung Transplantation (ISHLT) held in Chicago this week.