The objective of this randomized clinical trial is to compare the effects of a standardized exercise program alone versus the same program combined with neuromuscular electrical stimulation in patients undergoing heart failure . The main questions it aims to answer are:
* Assessing the ultrasonographic parameters: echo intensity (echogenicity), cross-sectional area, thickness, and pennation angle of the rectus femoris muscle in both lower limbs. * Evaluating the strength of the femoral quadriceps muscle * Evaluating the changes in the chronaxie of the rectus femoris muscle in both lower limbs.
The protocol will have a total duration of 32 days, with an initial intervention period of 18 days, followed by a 14-day follow-up period.
Age ≥ 18 years
Intra-aortic balloon pump (IABP) for more than 48 hours
Dobutamine ≤ 20 mcg/kg/min
Norepinephrine ≤ 0.2 mcg/kg/min (35)
Need for invasive mechanical ventilatory support
If the patient or responsible family member fails to sign or withdraws the informed consent