3DQRSarea is a strong marker for cardiac resynchronization therapy and can be obtained by taking the (i) summation or the (ii) difference of the areas subtended by positive and negative deflections in X, Y, Z vectorcardiographic electrocardiogram (ECG) leads. We correlated both methods with the instantaneous‐absolute‐3D‐voltage‐time‐integral (VTIQRS‐3D). 3DQRSarea consistently underestimated the VTIQRS‐3D, but the summation method was a closer and more reliable approximation. The dissimilarity was less apparent in left bundle branch block (r2 summation .996 vs. difference .972) and biventricular paced ECGs (r2 .996 vs. .957) but was more apparent in normal ECGs (r2 .988 vs. .653).

中文翻译：

---

根据心向量图 X、Y 和 Z 导联计算 3D QRS 面积的不同方法

3DQRSarea 是心脏再同步治疗的强标记，可以通过 X、Y、Z 心向量图心电图 (ECG) 导联中正偏转和负偏转所涵盖的区域的 (i) 总和或 (ii) 差值来获得。我们将这两种方法与瞬时绝对 3D 电压时间积分 (VTIQRS-3D）。 3DQRSarea 始终低估 VTIQRS波‐3D，但求和法是一种更接近、更可靠的近似方法。左束支传导阻滞中的差异不太明显（r2总和 0.996 对比差值 0.972) 和双心室起搏心电图 (r2.996 与 .957），但在正常心电图中更为明显（r2.988 与 .653）。