摘要: <正> Both systolic time interval （STI） and Frequency-domain Correlative Cardiogram （FCG）can reflect blood supply to the heart. From the FCG and STI recording of 90 patients who received cardiac function examination, we found that there was a significant correlation between FCG grades （FCGG） and STI grades （STIG）, FCGG and PEP, FCGG and LVET, FCGG and PEP/LVET, FCG Scores （FCGS） and STIG, FCGS and PEP, FCGS and LVET.FCGS and PEP/LVET, PEP/LVET and Gxx2. The discriminating function was above the level of α=0.01. And There was a significant correlation between ICT and FCGG, PEP/LVET and Gyy2. The discriminating was above the level α=0.05. But no significant correlation was found between ICT and FCGS、PEP/LVET and Rxy、PEP/LVET and Gxx1, PEP/LVET and Gxx1/Gxx2, PEP/LVET and Gyy1, PEP/LVET and Gyy1/Gyy2, PEP/ LVET and Pmax, PEP/LVET and Pmin.The results indicate that FCG is a new noninvasive method for cardiac function examiantion. And we can say that STI is a reliable method.