Smith, G S <br/><br/>
Exercise-induced alterations of signal-averaged electrocardiograms in marathon runners.  [electronic resource] 

 -  American heart journal  Dec 1989 
 - 1198-202 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0002-8703 
<br/><br/><label>Standard No.: </label>10.1016/0002-8703(89)90010-0  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Echocardiography<br/>Echocardiography, Doppler<br/>Electrocardiography<br/>Exercise--physiology<br/>Female<br/>Humans<br/>Male<br/>Middle Aged<br/>Physical Endurance<br/>Running