Introduction: Noninvasive ventilation (NIV) has been used to minimize such impairment and increasing ventilator reserve in individuals with heart failure. Aim: To analyze thoracoabdominal kinematics (TK) in individuals with HF associated to cardiomegaly after using NIV. Methods: A randomized crossover clinical trial with allocation consisted of two experimental phases: NIV and control, 7 days apart of each other. During NIV phase, 30 minutes of bi-level ventilation was performed. Any type of ventilator support was offered during control phase. Optoeletronic plethismography was performed to asses TK.

Inclusion Criteria:

• body mass index (BMI) <30 kg/m2
• functional class II-III according to the New York Heart Association
• of the echocardiogram últiimos 6 months showing ejection fraction (LVEF) ≤ 45%,
• últiimos echocardiogram of six months showing cardiac hypertrophy (left Ventricular Diastolic Diameter (LVDD)> 55mm, Diameter Systolic left Ventricular (LVSD)> 45mm ),
• (optimized from the point of view of drug,
• clinical stability.

Exclusion Criteria:

• unstable angina, myocardial infarction or heart surgery three months before the beginning of the research,
• chronic orthopedic, infectious or metabolic diseases,
• FEV1/FVC <70% predicted characterizing obstructive respiratory disorder;
• active smokers;
• Limitation on the use of NIV: claustrophobia, inability to remain with their mouths closed, abdominal distention, hemodynamic instability, heart rate (HR) <60 bpm, recent trauma, nausea and vomiting face.