摘要
以微电脑采集心导纳血流图，同步自动微分得心导纳微分图。将二者分别作为Ｘ，Ｙ座标拟合成心导纳微分环。测定２１０例３～５０岁健康儿童和成人心导纳微分环各相面积与总面积比值正常值，以逐步回归法建立了各面积比值的多元线性回归方程。
The first differential admittance cardiograph (dy/dt) was differentiated real time from the cardiac admittance plethysmograph (Δy) with microcomputer. The cardiac admittance differential loop (ADL) was drawn up by combination of Δy as abscissa and dy/dt as ordinate with microcomputer. The normal area ratios of each phase to sum of the ADL were obtained in 210 healthy subjects aged 3 to 50 years. The best regression equations of all area ratio indices were established using stepwise analysis method.
出处
《湖南医学》
1997年第1期6-7,共2页
Hunan Medical Journal
关键词
体积描记术
心动描记
心脏功能试验
微型计算机
plethysmography,impedance cardiography regression analysis multivariate analysis heart function tests microcomputer
