الفهرس 
ElectrocardiogramOnly 14 pages are availabe for public view
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Abstract
An important observation commody met with in the clinical practice is that clinical symptoms in patients with C.H.F. such as fatigue and dyspnea correlate poorly . with the degree of left ventricular dysfunction, and there is now ample evidence that clinical stage of C.H.F. is not closely related to the extent of left ventricular dysfunction.