The six-minute walk test (6MWT) and cardiopulmonary exercise testing (CPET) are two objective modalities utilized for examining the functional status in patients with heart failure (HF). CPET reproducibly determines maximum exercise capacity through measurements of peak oxygen uptake (peak VO2) and other ventilatory variables, and was shown to provide additional prognostic information that prioritize patients for heart transplantation (HT) and mechanical circulatory support, and predicts mortality [1].
