The aim of this study was evaluate the efficacy of noninvasive ventilation (NIV) on improving exercise tolerance of patients with heart failure (HF). A systematic review was performed in PubMed/ MEDLI
mean ± SD or number (%). Abbreviations: NIV, noninvasive ventilation; PaO2, partial pressure of arterial oxygen; FIO2, fraction of inspired oxygen; PaCO2, partial pressure of arterial carbon dioxide;
