Exercise Training Following Cardiac Resynchronization Therapy in Patients With Chronic Heart Failure

The exercise sessions will be hospital-based, 3 times a week for 60 minutes each, on non-consecutive days for 6 months. Selected the aerobic interval training (AIT) method for the development of cardiopulmonary system and the inclusion of resistance and sensorimotores exercises. The AIT comprises 4 interval training periods (high intensity) and 3 active pauses (moderate intensity) between interval training periods. The patient will warmup for 10 minutes at 50% to 60% of HRpeak from CPET, before walking to four 4 minutes intervals at 90 to 95% of peak HR. Each interval, including the last one, is separate by 3 minutes active pauses, walking at 60% to 70% of HRpeak. Total aerobic exercise time at this moment will be 28 minutes and will be maintain to the end of ExT intervention period.

Implantation will be performed according to standard techniques of biventricular pacing. The CRT includes a generator and three leads, used to correct ventricular dyssynchrony.