USEFULNESS OF TOTAL 12-LEAD QRS VOLTAGE COMPARED TO OTHER CRITERIA

将12导联QRS总波幅的敏感性与某些指标进行比较 左心室(LV)的标准心电图标准 57例肥厚型心肌病尸检结果分析 12导联QRS波幅范围为66~339 mm(平均179 mm)(10 mm =1 mV)。使用175毫米作为正常的上限，这项技术产生了 敏感度为53%，是所有标准中敏感度最高的 测试过。索科洛-里昂指数的灵敏度为39%；罗姆希尔特-埃斯蒂斯指数 电压标准，37%；罗姆希尔特-埃斯蒂斯积分系统，49%，以及 RV6&GT；RV5标准，39%。未发现总12导联之间的相关性 QRS电压和心脏重量、LV游离壁厚度、LV峰值收缩压和 舒张末压或左室流出道峰值收缩压 渐变。10例(18%)穿壁型LV瘢痕患者 总12导联QRS电压低于48例无QRS导联的患者(78%) 瘢痕(155 mm比-205 mm，p=0.02)。总12导联QRS波幅&GT；175 mm 是左室肥大的有用指标，在慢性丙型肝炎患者中 比其他更常用的标准更敏感。

The sensitivity of the total 12-lead QRS amplitude was compared to certain standard electrocardiographic criteria for left ventricular (LV) hypertrophy in 57 necropsy patients with hypertrophic cardiomyopathy (HC). The total 12-lead QRS amplitude ranged from 66 to 339 mm (mean 179) (10 mm = 1 mV). Using 175 mm as the upper limit of normal, this technique yielded a sensitivity of 53% which was the highest sensitivity of any criteria tested. The Sokolow-Lyon index had a sensitivity of 39%; the Romhilt-Estes voltage criteria, 37%; the Romhilt-Estes point score system, 49%, and the criterion of RV6 > RV5, 39%. No correlation was found between total 12-lead QRS voltage and heart weight, LV free wall thickness, LV peak systolic and end-diastolic pressures or LV outflow tract peak systolic pressure gradient. The 10 patients (18%) with transmural LV scars had significantly lower total 12-lead QRS voltage than did the 48 patients (78%) without such scars (155 mm - vs. - 205 mm, p=0.02). Total 12-lead QRS amplitude >175 mm is a useful indicator of LV hypertrophy, and among patients with HC it is more sensitive than other more commonly employed criteria.