background: various techniques are used in diagnosing cardiac diseases. the electrocardiogram is one of these tools in common use. in this study vectorcardiogram ) vcg ( signals are used as a tool for detection of cardiac ischemia. methods: vcg signals used in this study were obtained form 60 patients suspected to have ischemia disease and 10 normal candidates. verification of the ischemia had ...

Several new lead systems for electrocardiography and vectoreardiography have been proposed. Clinical evaluation of these systems is necessary to determine whether they yield useful information in addition to that furnished by conventional leads and whether the same information obtained from conventional leads appears in recognizable form in the new leads. This study is a step toward such an eva...

A new lead system recording nine surface ECGs was found capable of resynthesizing in each patient all the QRS waveforms recorded on the thoracic surface. Observations were made in 416 patients: 150 normal (N) individuals, 95 patients with left ventricular hypertrophy (LVH), 97 patients with right ventricular hypertrophy (RVH), and 74 patients with biventricular hypertrophy (BVH). After time-nor...

The study aim was to construct linear transformations for derivation of McFeeParungao vectorcardiogram (VCG) from 12 standard ECG or Frank VCG and to assess the accuracy of derived electric cardiac signals (ECS) and secondarily derived VCG parameters. A large archive of VCG data recorded in the McFee-Parungao lead system have been accumulated and analyzed in the Cardiology Research Complex (Mos...

The evolution of the vectorcardiogram obtained with the Frank lead system (Frank, 1956) from normal infants was reported in a previous publication (Namin et al., 1964). It was based on a study of 216 vectorcardiograms on 107 infants. To establish a baseline for the vectorcardiographic recognition of ventricular overwork patterns in children, the vectorcardiograms of a group of normal older chil...

A quantification of the Frank and McFee-Parungao orthogonal electrocardiogram of 175 normal children, ages 2-10 years is presented. There are significant differences in age groups 2-5 and 6-10. The QRS voltages of the younger group demonstrate 1) greater Z anterior, 2) greater initial X right, 3) greater terminal X right, 4) smaller Y inferior, and 5) the T vector is oriented more posteriorly. ...

Vectorcardiography is being used increasingly as a supplement to conventional electrocardiography. In particular, the scalar tracings may not help in the recognition of right ventricular hypertrophy, because the usually accepted criteria are diverse and unreliable (Sokolow and Lyon, 1949; Milnor, 1957; Wasserburger and Brown, 1958). We have chosen a measurable quantity, namely mean pulmonary ar...