Hayabuchi Y, Matsuoka S, Kubo M, Mori K, Tatara K, Kuroda Y
Department of Pediatrics, Tokushima University School of Medicine, Japan.
J Electrocardiol. 1996 Apr;29(2):111-7. doi: 10.1016/s0022-0736(96)80120-8.
Right ventricular pressure overload was evaluated in 29 patients, 8-12 years old, with surgically repaired tetralogy of Fallot by using body surface QRST isointegral maps. In patients with right ventricular systolic pressure above 50 mmHg, the maxima of the isointegral maps tended to shift toward the lower right-hand region of the map. The maximum value was significantly correlated with right ventricular systolic pressure (r = .58; P < .01). There was a correlation between the right ventricular systolic pressure and the percentage +2SD and percentage +5SD departure areas, which are defined as the area (expressed as a percentage of the total chest area) in which the QRST integral values are greater than the normal mean +2SD or +5SD, respectively (r = .61 and .84, P < .01). The QRST isointegral map can be used to evaluate right ventricular pressure overload in postoperative patients with tetralogy of Fallot complicated by right bundle branch block. The percentage +5SD departure area is the most valuable parameter for the quantitative evaluation of the right ventricular systolic pressure.
通过体表QRST等积分图对29例8至12岁法洛四联症手术修复患者的右心室压力超负荷情况进行了评估。在右心室收缩压高于50 mmHg的患者中，等积分图的最大值倾向于向图的右下角区域偏移。最大值与右心室收缩压显著相关（r = 0.58；P < 0.01）。右心室收缩压与+2SD百分比和+5SD偏离面积之间存在相关性，+2SD百分比和+5SD偏离面积分别定义为QRST积分值大于正常均值+2SD或+5SD的面积（以胸部总面积的百分比表示）（r = 0.61和0.84，P < 0.01）。QRST等积分图可用于评估法洛四联症合并右束支传导阻滞术后患者的右心室压力超负荷情况。+5SD偏离面积是定量评估右心室收缩压最有价值的参数。
