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Figure 3 Progression of CHF and COPD

Time course of loss of cardiac or pulmonary function (A), loss of skeletal muscle mass (B), and functional incapacity (C) during the progression of chronic heart failure (CHF) or chronic obstructive pulmonary disease (COPD). Curves A and C in CHF patients are based on data collected during studies of left ventricular dysfunction (101). Curve B in CHF patients and curves A, B, and C in COPD patients are based on clinical experience in the absence of quantitative data.