Can this struggling healthcare specialist turn things around?Medtronic (MDT -0.21%) is a leading global medical device company with a massive presence that spans more than 150 countries. Its products assist patients with over 70 different health conditions. Investing in the stock is a potentially great way to gain exposure to the healthcare industry as a whole.Over the past five years, however, its shares have been a lackluster investment, falling by 8%. What should you do with Medtronic stock: buy, sell, o ...