摘要
ST段变化是心电图(ECG)检测心肌缺血(MI)主要的临床表现,受基线漂移、体位变化、电极等因素影响,给ST段的有效检测带来困难。目前ST段常用的检测方法有:R+x和J+x,但它们受T波形态变异影响很大,且J点定位也存在一定的难度。基于上述原因,本文提出了一种方便准确的T波起点检测方法,该方法不需定位T波峰点,且受基线漂移、T波变异等的影响很小。然后联合R波峰点和T波起点提出了一种ST段夹逼检测方法,经公共数据库Long-Term ST database(LTST)验证,该方法有很好的实时性和鲁棒性,且准确率能够达到92%以上。
ST-segment is the main clinical appearance in myocardial ischemia detection based on electrocardiogram （ECG） signals. However, it is highly sensitive to interferences （baseline wandering, postural changes, electrode in- terference, etc. ）, which cause the feature points of ECG ST-segment to be difficult to detect accurately. Currently, the common detection methods of ST-segment are： RA-x and J-kx, but they are affected badly by T-wave morpho- logical variability and J point location. For these reasons, firstly we proposed a convenient and accurate approach for T-wave onset in this paper. It did not need to locate T-wave peak and was robust to baseline wandering and T-wave morphology. Secondly, we proposed a squeeze approach for ST-segment detection based on R-wave peak and T-wave onset. After the Long-Term ST database （LTST） verification, the proposed method has shown a good timeliness and robustness, and the accuracy of ST-segment detection has reached above 92%.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2011年第5期855-859,共5页
Journal of Biomedical Engineering
基金
中国航天医学工程预先研究项目资助(SJ200903)
关键词
心电图
心肌缺血
ST段
T波起点
Electrocardiogram （ECG）
Myocardial ischemia （MI） t ST-segment
T-wave onset
