Open AccessThe Normal QRS Loop Observed Three Dimensionally Obtained with the Frank Precordial System
Author(s) -
George E. Seiden
Publication year - 1957
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.16.4.582
Subject(s) - precordial examination , qrs complex , medicine , vectorcardiography , loop (graph theory) , rotation (mathematics) , cardiology , electrocardiography , nuclear magnetic resonance , combinatorics , physics , geometry , mathematics
By means of a relatively orthogonal lead system combined with the use of an electronic resolver, 3-dimensional QRS loops of normal individuals have been seen broadside in 2 dimensions after proper rotation. QRS loops so visualized have been studied by certain quantitative measurements which it is hoped may be of assistance in distinguishing normal from abnormal loops.
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