The two main symptoms referred by chronic heart failure (HF) patients as the causes of exercise termination during maximal cardiopulmonary exercise testing (CPET) are muscular fatigue and dyspnoea. So far, a physiological explanation why some HF patients end exercise because of dyspnoea and others because of fatigue is not available.
The Authors assessed (in 170 consecutive HF patients with reduced left ventricular ejection fraction in stable clinical condition) whether patients referring dyspnoea or muscular fatigue may be distinguished by different ventilator or haemodynamic behaviours during exercise.
They conclude that in chronic HF patients in stable clinical condition, fatigue and dyspnoea as reasons of exercise termination do not highlight different ventilatory or haemodynamic patterns during effort.
- Morosin M, Farina S, Vignati C, Spadafora E, Sciomer S, Salvioni E, Sinagra G, Agostoni P. Exercise performance, haemodynamics, and respiratory pattern do not identify heart failure patients who end exercise with dyspnoea from those with fatigue. ESC Heart Fail 2017 Nov 24. doi: 10.1002/ehf2.12207. [Epub ahead of print] Go to PubMed