Noninvasive ventilation can modulate heart rate variability during high-intensity exercise in COPD-CHF patients.

Objective: to assess the acute effects of non-invasive ventilation (NIV) during high-intensity exercise on heart rate variability (HRV) responses in chronic obstructive pulmonary disease (COPD) and Chronic heart failure (CHF) patients.

Methods: This was randomized, double blinded and controlled study. Fourteen patients with COPD-HF diagnosis were evaluated.