Double-blind, Randomized, Placebo-controlled, Parallel-group, Phase IV Study to Evaluate the Effect of Aclidinium Bromide on Long-term Cardiovascular Safety and COPD Exacerbations in Patients With Moderate to Very Severe COPD (ASCENT COPD).

Purpose: The objectives of this study are to assess the safety of Aclidinium bromide on major adverse cardiovascular events (MACE), to assess the overall safety of Aclidinium bromide and to assess whether Aclidinium bromide reduces moderate or severe COPD exacerbations. Participation could last up to 36 months.