ABSTRACT
Heart failure [HF] is a major health problem facing the population and development all over the world. Selection of patients with heart failure that are at higher risk and in need for more aggressive and interventional modalities in treatment is needed to improve the outcome of HF patients. The functional capacity of HF patients is a good indicator of the patients' clinical status and response to therapy. Therefore, non-invasive predictors of the functional capacity in patients with HF will be useful in determining patients with low functional capacity, worse clinical status and thus at higher risk. 51 patients of either sex, aged 18 years or above attending Suez Canal University Hospital Cardiology outpatient clinic known to have depressed left ventricular [LV] systolic function "Ejection fraction [EF]