Grant M E, Hanson J S
J Electrocardiol. 1982 Jan;15(1):69-76. doi: 10.1016/s0022-0736(82)80047-2.
A low-cost micro-processor combined with a standard 3-channel electrocardiographic recorder was adapted to polar coordinate conversion of Frank orthogonal lead signals and display of the resultant polarcardiogram. The processor also functions as a computer of average transients for the ECG complexes and provides automatic recorder function at specified intervals during electrocardiographic exercise stress testing. Polarcardiographic variables such as magnitude, longitude and latitude at particular temporal points are calculated and values displayed by the micro-processor. The configuration provides an economical, accurate and reliable alternative to larger systems and may easily be adapted to other applications.
一个低成本的微处理器与一台标准的三通道心电图记录仪相结合，被用于将弗兰克正交导联信号进行极坐标转换，并显示所得的极坐标心电图。该处理器还可作为心电图复合波平均瞬变值的计算器，并在心电图运动负荷试验期间按指定间隔提供自动记录功能。微处理器会计算特定时间点的极坐标心电图变量，如幅值、经度和纬度，并显示这些值。这种配置为大型系统提供了一种经济、准确且可靠的替代方案，并且可以轻松地应用于其他领域。
