CHICAGO, June 2 (Reuters) - Medical device maker Medtronic Inc (MDT.N: Quote, Profile, Research) said on Monday it would focus on improving operating margins to drive annual per-share earnings growth of 11 percent to 14 percent. Outlining its long-term financial targets at a meeting with investors, the company said it expects revenue to increase 9 percent to 11 percent annually from in the period fiscal 2008-2013 as faster growth in spine, cardiovascular, neuromodulation, diabetes and surgical technology products more than offsets a slowdown in the company's core heart rhythm device markets.
