This paper presents an improved, clinically practical system of spatial vectorcardiography that offers a balance between theoretical soundness, accuracy, reproducibility, signal-to-noise ratio, and speed of application. The system uses seven electrodes (three on the precordium) and computing networks to enable quantitative analysis of electrocardiographic potentials. It corrects for torso shape, avoids the left arm, is insensitive to individual variability in ventricle location, and reduces muscle tremor interference. The system is designed to produce vectorcardiograms with greater accuracy than current systems. The system's theoretical basis is supported by experimental data, with an accuracy of ±15%. It is particularly effective for dipole locations within a 5 cm cube centered on a typical ventricular location, with image vectors accurate to ±5° in angle and ±20% in length. The system includes precise electrode placement guidelines and practical considerations for clinical use. A novel technique for determining the electrical level of the ventricles is described, and two different 3-resistor terminals representing the dipole midpotential are outlined. The system is practical for clinical use, with electrode placement being critical but manageable. The system's performance is compared to the Wilson tetrahedron system, showing significant improvements in accuracy, particularly in the front-to-back component. The system is supported by experimental evidence for the QRS loop, though less is known about its performance with T loops and P loops. The system is expected to reveal new invariants not previously discernible. The system's cost is comparable to other vectorcardiography systems, and it is suitable for routine clinical use with a relatively short application time. The system's accuracy is validated through comparisons with research data, demonstrating its effectiveness in clinical settings.This paper presents an improved, clinically practical system of spatial vectorcardiography that offers a balance between theoretical soundness, accuracy, reproducibility, signal-to-noise ratio, and speed of application. The system uses seven electrodes (three on the precordium) and computing networks to enable quantitative analysis of electrocardiographic potentials. It corrects for torso shape, avoids the left arm, is insensitive to individual variability in ventricle location, and reduces muscle tremor interference. The system is designed to produce vectorcardiograms with greater accuracy than current systems. The system's theoretical basis is supported by experimental data, with an accuracy of ±15%. It is particularly effective for dipole locations within a 5 cm cube centered on a typical ventricular location, with image vectors accurate to ±5° in angle and ±20% in length. The system includes precise electrode placement guidelines and practical considerations for clinical use. A novel technique for determining the electrical level of the ventricles is described, and two different 3-resistor terminals representing the dipole midpotential are outlined. The system is practical for clinical use, with electrode placement being critical but manageable. The system's performance is compared to the Wilson tetrahedron system, showing significant improvements in accuracy, particularly in the front-to-back component. The system is supported by experimental evidence for the QRS loop, though less is known about its performance with T loops and P loops. The system is expected to reveal new invariants not previously discernible. The system's cost is comparable to other vectorcardiography systems, and it is suitable for routine clinical use with a relatively short application time. The system's accuracy is validated through comparisons with research data, demonstrating its effectiveness in clinical settings.