374 HANDBOOK OF PHYSIOLOGY ^ CIRCULATION I 



TABLE 7. Tabulation of Aiean Results and Standard Deviations of the Normal Orthogonal Vectorcardiogram* 



* The loops have been recorded with the SVEC III system; the data are corrected after the author's instruction. Angles 

 as in fig. 58. [From Pipberger (368).] 



t SE = standard error. Number of subjects for each measured item is given in parentheses. Ranges between lowest and 

 highest values were indicated only when the distribution appeared asymmetric or when the range could not be defined properly 

 by the means and standard deviations. 



TABLE 8. Maximal Vectors of the QRS and T Loop in 

 Space Are Given with Their Projections on 

 the Frontal and Sagittal Plane* 



TABLE 9. Angles of the Long Axis of the QRS Loop, 

 Measured According to Fig. ^8, in Their 

 Projection on the Three Planes* 



* Equilateral tetrahedron (Wilson) as reference system. 

 Angles as in fig. 58. The table includes data from only 66 of 

 the 75 individuals in the series. The 66 had typical elliptical 

 loops; the other 9 had the less usual rounded loops. [From 

 Burch et at. (137).] 



* Reference system: the Grishman cube and the Duchosal 

 system (fig. 20). [Values from Young et at. (537).] 



