Comparison of spatial instantaneous ECG vectors, measured with the SVEC, with mean vectors derived from conventional ECG leads.

Two approaches to the analysis of spatial electrocardiographs vectors are currently being used: construction from the conventional ECG leads, and measurements from oscilloscopic recordings of spatial loops. There are seveml fundamental differences between the approaches, and there is no a priori certainty that equivalent or even similar phenomena are being investigated. This study presents a statistical comparison between mean spatial vectors, constructed from the conventional ECG, and instantaneous maximum spatial vectors, determined with the stereovector electro-cardiographic technic.