Open AccessThe Effect of Age on Mean Spatial QRS and T Vectors
Author(s) -
Ernst Simonson,
Ancel Keys
Publication year - 1956
Publication title -
circulation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.795
H-Index - 607
eISSN - 1524-4539
pISSN - 0009-7322
DOI - 10.1161/01.cir.14.1.100
Subject(s) - vectorcardiography , medicine , qrs complex , electrocardiography , cardiology , age groups , elevation (ballistics) , azimuth , euclidean vector , statistical analysis , statistics , demography , mathematics , geometry , sociology
The differentiation between normal and abnormal changes in conventional electrocardiography is substantially improved by consideration of normal age trends. For clinical application of spatial vectorcardiography, consideration of age trends is equally important. On the basis of statistical evaluation of magnitude, azimuth and elevation of mean spatial QRS and T vectors in 105 healthy young men and 178 healthy older men, upper and lower limits were determined for each age group. The age differences were highly significant for all items of vector analysis.
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