The Polarcardiograph. Further studies of normal subjects, refinement of criteria for infarction, and a report on autopsied cases

Polarcardiographic and vectorcardiographic study of 70 normal children aged 3‐4 years

“…The polar tracings ( Fig. I) we re in general basically simil ar to those seen in nonnal adults (2, 9,10,12,15). However, there were more high frequency components in the magnitude tracings (Fig .…”

“…7 with those found in 196 normal young adult men and women (9,10). The area defined by the P directions in the children falls within that for adults.…”

“…Normal adults in various age groups have been studied polarcardiographically (2, 5, 9,10,12,14) but there have been no reports of studies on children. Even vectorcardiographic studies of large numbers of normal children, in a full range of ages, are not available for the establishment of voltage criteria for left ventricular hypertrophy (L VH), although electrocardiographic voltage criteria remain the basis for the diagnosis of most instances of this condition in the pediatric age group (17,28).…”

“…Polarcardiography provides an accurate method for analyzing activation, repolarization, conductivity and rhythm (5). It offers considerable improvement over the ECG in the diagnosis of myocardial infarction (10,13,20,23) but is also useful in other conditions including L VH (5, 11).…”

Ischemic Polarcardiographic Changes Induced By Exercise

“…Figures [3][4][5] show PCGs in typical cases. In addition to the changes in the M tracing, there was a rightward direction of early ST-vectors revealed by the a-longitude tracing approaching 180.…”