A novel method for detection of ventricular late potentials (VLP) using artificial neural network (ANN) from wavelet preprocessed vector magnitude waves (VMW) is proposed. The VMW is firstly processed with a continuou...A novel method for detection of ventricular late potentials (VLP) using artificial neural network (ANN) from wavelet preprocessed vector magnitude waves (VMW) is proposed. The VMW is firstly processed with a continuous wavelet transform (CWT). Then eight features are extracted from time frequency energy distribution of VMW, and are inputted into ANN for VLP detection. The ANN is trained with 40 clinical samples and tested using another 38 clinical samples, respectively. The results show that the specifically designed ANN can detect VLP with the high rate of correct classification (93.33%), and can enhance the sensitivity and specificity of VLP detection as compared with conventional time domain method.展开更多
目的探讨心室晚电位(ventricular late potential,VLP)在急性冠脉综合征临床疗效评估中的应用价值。方法选择2021年10月—2023年4月本院接收的89例急性冠脉综合征患者为研究对象,按照病症分为不稳定心绞痛组(28例)、非ST段抬高型心肌梗...目的探讨心室晚电位(ventricular late potential,VLP)在急性冠脉综合征临床疗效评估中的应用价值。方法选择2021年10月—2023年4月本院接收的89例急性冠脉综合征患者为研究对象,按照病症分为不稳定心绞痛组(28例)、非ST段抬高型心肌梗死组(30例)、ST段抬高型心肌梗死组(31例),对所有患者实施VLP检测,记录患者指标变化,观察不同组别患者VLP阳性率差异,研讨不同组别患者心室晚电位检测结果对不良心血管事件预测的准确率,对比不同组别VLP阳性检出率。结果本次研究中,不稳定心绞痛患者的VLP阳性检出率3.57%(1/28),非ST段抬高型心肌梗死VLP阳性检出率为10%(3/30),ST段抬高型心肌梗死患者VLP阳性检出率为38.70%(12/31);VLP预测发生急性不良心血管事件的敏感性和特异性分别为44.44%和85.00%,预测符合率为25.00%。结论急性冠脉综合征患者实施VLP预后诊断,对高危型阳性诊断率较高,可预测急性冠脉综合征,值得推广。展开更多
目的探讨致心律失常性右心室心肌病(arrhythmogenic right ventricular dysplasia/cardiomyopathy,ARVD/C)合并室性心动过速与心室晚电位的关系。方法ARVD/C38例,男28例,女10例,年龄(35±15)岁。心电图检查进行信号叠加,记录心室晚...目的探讨致心律失常性右心室心肌病(arrhythmogenic right ventricular dysplasia/cardiomyopathy,ARVD/C)合并室性心动过速与心室晚电位的关系。方法ARVD/C38例,男28例,女10例,年龄(35±15)岁。心电图检查进行信号叠加,记录心室晚电位量化参数:总QRS时限(total QRS duration,QRST)、QRS终末部位电压低于40μV时限(low potential terminal signals,LPS40)、QRS最后40ms电压方根均数(root mean square of the last 40 ms,RMS40);动态心电图检查记录室性心动过速和室性期前收缩。使用χ2及Mann-Whitney秩和检验统计。结果①心室晚电位阳性25例,其中室性心动过速18例;心室晚电位阴性13例,室性心动过速3例(P=0.004);②室性心动过速阳性21例,阴性17例,QRST:室性心动过速阳性组109~233(中位数147)ms,阴性组85~158(中位数104)ms(P=0.000);LPS40:阳性组15~158(中位数53)ms和阴性组6~63(中位数27)ms(P=0.001);RMS40:阳性组1.6~6.0(中位数7.6)μV,阴性组8.2~162.9(中位数27.7)μV(P=0.000)。结论心室晚电位在预测ARVD/C高危性可能有一定价值。展开更多
文摘A novel method for detection of ventricular late potentials (VLP) using artificial neural network (ANN) from wavelet preprocessed vector magnitude waves (VMW) is proposed. The VMW is firstly processed with a continuous wavelet transform (CWT). Then eight features are extracted from time frequency energy distribution of VMW, and are inputted into ANN for VLP detection. The ANN is trained with 40 clinical samples and tested using another 38 clinical samples, respectively. The results show that the specifically designed ANN can detect VLP with the high rate of correct classification (93.33%), and can enhance the sensitivity and specificity of VLP detection as compared with conventional time domain method.
文摘目的探讨心室晚电位(ventricular late potential,VLP)在急性冠脉综合征临床疗效评估中的应用价值。方法选择2021年10月—2023年4月本院接收的89例急性冠脉综合征患者为研究对象,按照病症分为不稳定心绞痛组(28例)、非ST段抬高型心肌梗死组(30例)、ST段抬高型心肌梗死组(31例),对所有患者实施VLP检测,记录患者指标变化,观察不同组别患者VLP阳性率差异,研讨不同组别患者心室晚电位检测结果对不良心血管事件预测的准确率,对比不同组别VLP阳性检出率。结果本次研究中,不稳定心绞痛患者的VLP阳性检出率3.57%(1/28),非ST段抬高型心肌梗死VLP阳性检出率为10%(3/30),ST段抬高型心肌梗死患者VLP阳性检出率为38.70%(12/31);VLP预测发生急性不良心血管事件的敏感性和特异性分别为44.44%和85.00%,预测符合率为25.00%。结论急性冠脉综合征患者实施VLP预后诊断,对高危型阳性诊断率较高,可预测急性冠脉综合征,值得推广。
文摘目的探讨致心律失常性右心室心肌病(arrhythmogenic right ventricular dysplasia/cardiomyopathy,ARVD/C)合并室性心动过速与心室晚电位的关系。方法ARVD/C38例,男28例,女10例,年龄(35±15)岁。心电图检查进行信号叠加,记录心室晚电位量化参数:总QRS时限(total QRS duration,QRST)、QRS终末部位电压低于40μV时限(low potential terminal signals,LPS40)、QRS最后40ms电压方根均数(root mean square of the last 40 ms,RMS40);动态心电图检查记录室性心动过速和室性期前收缩。使用χ2及Mann-Whitney秩和检验统计。结果①心室晚电位阳性25例,其中室性心动过速18例;心室晚电位阴性13例,室性心动过速3例(P=0.004);②室性心动过速阳性21例,阴性17例,QRST:室性心动过速阳性组109~233(中位数147)ms,阴性组85~158(中位数104)ms(P=0.000);LPS40:阳性组15~158(中位数53)ms和阴性组6~63(中位数27)ms(P=0.001);RMS40:阳性组1.6~6.0(中位数7.6)μV,阴性组8.2~162.9(中位数27.7)μV(P=0.000)。结论心室晚电位在预测ARVD/C高危性可能有一定价值。