1) Weltman A, Wood CM, Womack CJ, et al:Catecholamine and blood lactate responses to incremental rowing and running exercise. J Appl Physiol 76:1144-1149, 1994
2) Myers J, Prakash M, Froelicher V, et al:Exercise capacity and mortality among men referred for exercise testing. N Engl J Med 346:793-801, 2002
ratio during exercise as a predictor of outcomes in patients with heart failure. J Card Fail 15:756-762, 2009
4) Mejhert M, Linder-Klingsell E, Edner M, et al:Ventilatory variables are strong prognostic markers in elderly patients with heart failure. Heart 88:239-243, 2002
5) Sullivan MJ, Higginbotham MB, Cobb FR:Increased exercise ventilation in patients with chronic heart failure:intact ventilatory control despite hemodynamic and pulmonary abnormalities. Circulation 77:552-559, 1988
6) Chase PJ, Kenjale A, Cahalin LP, et al:Effects of respiratory exchange ratio on the prognostic value of peak oxygen consumption and ventilatory efficiency in patients with systolic heart failure. JACC Heart Fail 1:427-432, 2013
7) Astrand PO, Cuddy TE, Saltin B, et al:Cardiac Output during Submaximal and Maximal Work. J Appl Physiol 19:268-274, 1964
8) Wasserman K:Principles of exercise testing & interpretation:including pathophysiology and clinical applications. 3rd ed. Lippincott Williams & Wilkins, Philadelphia, 1999