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Comparison of Q(R) to T Peak Time in Right and Left Precordial Leads in Children
Author(s) -
Awa Shoichi,
Yanagawa Yukishige,
Hishi Toshio,
Akagi Michio,
Dodo Hidemi
Publication year - 1987
Publication title -
pediatrics international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.49
H-Index - 63
eISSN - 1442-200X
pISSN - 1328-8067
DOI - 10.1111/j.1442-200x.1987.tb00040.x
Subject(s) - medicine , precordial examination , cardiology , discriminator , volume overload , interval (graph theory) , pressure overload , hemodynamics , contrast (vision) , electrocardiography , combinatorics , physics , heart failure , mathematics , detector , optics , cardiac hypertrophy
An electrocardiographic measurement useful in the diagnosis of right ventricular overload, involving precordial T waves, is presented. The longest Q(R) to T peak interval from V 3R to V 4 (V 5 ) was longer than or identical with the same interval in both V 5 and V 6 (V 7 ) when hemodynamic right ventricular overload was present. Sensitivity was greater when volume overload was present than with pure pressure overload. In contrast to the non‐specificity of the vectorcardiographic horizontal T loop, inscription and contour, the newly presented corresponding electrocardiographic parameter proved to be a simple, sensitive and specific discriminator of right ventricular overload. Discrepancy in diagnostic usefulness between the two systems (EKG versus VKG) is discussed in terms of proximity effects in precordial leads.