Cardiovascular disease is associated with COPD severity and reduced functional status and quality of life.
Black-Shinn JL, Kinney GL, Wise AL, Regan EA, Make B, Krantz MJ, Barr RG, Murphy JR, Lynch D, Silverman EK, Crapo JD, Hokanson JE. Cardiovascular disease is associated with COPD severity and reduced functional status and quality of life. COPD. 2014 Sep; 11(5):546-51.