title: A simple VCG system with temporal dimension, directional reference and display of component loops.
abstract: A vectorcardiogram (VCG) represents the cardiac electrical activity as continuous vector loops in three mutually perpendicular planes, namely frontal, transverse and sagittal. This technical note describes a simple system developed to record VCG with an ordinary x-y oscilloscope and simple camera. Facilities exist for recording VCG with temporal dimension, directional reference and display of specific component loops of a cardiac cycle. The system is in use for recording VCG at rest and during stress tests involving exercise and hypoxia at simulated altitude. Its performance has been found satisfactory and the system highly reliable.
mesh_terms: D003626:Data Display; D005069:Evaluation Studies as Topic; D005082:Physical Exertion; D012146:Rest; D013997:Time Factors; D014672:Vectorcardiography / Q000295:instrumentation* / Q000379:methods