The minute ventilation (VE)-carbon dioxide output (VCO(2)) relationship has recently been demonstrated to have prognostic significance in the heart failure (HF) population. However, the method by which the VE/VCO(2) slope is expressed has been inconsistent.
Department of Physical Therapy, Virginia Commonwealth University, Medical College of Virginia, Health Sciences Campus, Richmond, 23298-0224, USA. raarena@mail2.vcu.edu
