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Cardiovascular Research 1967 1(2):167-168; doi:10.1093/cvr/1.2.167
© 1967 by European Society of Cardiology
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Copyright © 1967, European Society of Cardiology

The Ventricular Vector and Polar Gradient*

Zang Z. Zao

From the VCG Laboratory, DeGoesbriand Memorial Hospital, Department of Medicine, University of Vermont College of Medicine, and Cardiographic Laboratory, Research in Electrocardiology, Inc., Burlington, Vermont, U.S.A.

Author's Synopsis: Unlike Burger's polar vector, the ventricular vector is dependent on the time course of the ventricular electrical activity. Its unit is (µv·sec)2. Unlike Wilson's ventricular gradient, the polar gradient, a purely geometrical entity, is independent of the time course. Preliminary studies indicate that these four vectors may have complementary clinical value.

* Supported by U.S.P.H.S. Research Grant HE-07695, from the National Heart Institute.


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