Swatzell, R H <br/><br/>
The use of the systolic time interval for predicting left ventricular ejection fraction ischemic heart disease.  [electronic resource] 

 -  American heart journal  Apr 1977 
 - 450-4 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0002-8703 
<br/><br/><label>Standard No.: </label>10.1016/s0002-8703(77)80407-9  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coronary Disease--physiopathology<br/>Heart Rate<br/>Humans<br/>Myocardial Contraction