Riggs, T <br/><br/>
Ventricular septal defect in infancy: a combined vectorgraphic and echocardiographic study.  [electronic resource] 

 -  Circulation  Feb 1979 
 - 385-94 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0009-7322 
<br/><br/><label>Standard No.: </label>10.1161/01.cir.59.2.385  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cardiac Catheterization<br/>Echocardiography<br/>Female<br/>Heart Septal Defects, Ventricular--diagnosis<br/>Hemodynamics<br/>Humans<br/>Infant<br/>Infant, Newborn<br/>Male<br/>Myocardial Contraction<br/>Vectorcardiography