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最近,Yvonne等在《Heart Rhythm》杂志2016年第3期发表的文章指出:J波时限与夹角(斜率)增大可成为早复极波患者危险分层的新指标。测量方法:1J波时限:其指J波起点做的垂线与等电位线的交点到J波结束点之间的时限。切迹型J波起点指R波与J波的交点,顿挫型J波的起点指R波降支的斜率转折点,而J波结束点是J波之末与等电位线的交点;2J波斜率:J波起点与终点的连接线和J波起点做的垂线之间形成的夹角(图1)。判断标准:J波时限>60ms为阳性,<60ms为阴性;J波角度>30°为阳性,<30°为阴性。
Recently, Yvonne et al. Published in Heart Rhythm, Issue 3, 2016, pointing out that the increased J-wave duration and included angle (slope) can be new indicators of risk stratification in patients with early-repolarization. Measuring method: 1J wave time limit: It refers to the beginning of the J wave perpendicular to the equipotential line intersection to the J wave between the end of the time limit. The starting point of the notch J wave refers to the intersection of the R wave and the J wave. The starting point of the frustrated J wave refers to the slope turning point of the R wave descending branch, and the J wave ending point is the intersection of the J wave and the equipotential line; : J wave between the start point and the end of the connection line and J wave from the starting point of the perpendicular between the angle formed (Figure 1). Criteria: J wave duration> 60ms positive, <60ms negative; J wave angle> 30 ° positive, <30 ° negative.