(Reuters) - Medical device maker Abbott Laboratories reported quarterly revenue that fell just short of Wall Street estimates and trimmed the upper end of its full-year earnings forecast on Wednesday, sending its shares down 2%.The miss was mainly due to the company's flagship cardiovascular unit. The business reported sales of $2.40 billion, below estimates of $2.44 billion, according to two analysts polled by Refinitiv.That offset gains in its fast-growing diabetes care business. The unit..