Vector loops from normal children recorded with the HCB spatial lead system

Abstract

The HCB spatial lead system is described. It employs the Burger coefficients developed from a heterogeneously conductive model and human cardiac electrical activities. All other biophysically founded spatial lead systems developed in this country are from homogeneously conductive models. The electrode placement of the HCB system is the same as with the equilateral tetrahedron, the most convenient among all lead systems, but the former rests on a biophysical foundation. A preliminary study of the HCB system with normal children shows that in the horizontal plane the QRS loops are very similar in configuration and orientation and the angles formed by maximum QRS and T vectors are very narrow. With improved torso models more accurate coefficients can be determined at present. Whether the new coefficients, though desirable experimentally, will improve the diagnostic value of clinical vectorcardiography is uncertain.