Heart failure (HF) treatment is generally planned and
conducted by clinical judgment. Voltages of the ECG QRS complexes
in patients with established HF increases by clinical improvement
and decreases by clinical worsening probably due to pronounced
or resolved interstitial edema status. The aim of the present study
was to evaluate QRS voltage changes with HF treatment and to
determine the clinical value of QRS amplitude changes in predicting
the clinical improvement.