Value of the QRS complex in assessing left ventricular ejection fraction

1978 ◽  
Vol 41 (3) ◽  
pp. 494-499 ◽  
Author(s):  
Joseph Askenazi ◽  
Alfred F. Parisi ◽  
Peter F. Cohn ◽  
William B. Freedman ◽  
Eugene Braunwald
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