The partial pressure of resting end-tidal carbon dioxide predicts major cardiac events in patients with systolic heart failure.
Arena R, Myers J, Abella J, Pinkstaff S, Brubaker P, Moore B, Kitzman D, Peberdy MA, Bensimhon D, Chase P, Guazzi M. The partial pressure of resting end-tidal carbon dioxide predicts major cardiac events in patients with systolic heart failure. Am Heart J. 2008 Nov; 156(5):982-8.