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目的探讨扩张型心肌病伴阵发性房颤患者P波离散度与心功能的相关性及其对房颤发作的预测价值。方法64例扩张型心肌病患者分为两组A组(伴阵发性房颤)32例,B组(无阵发性房颤)32例。两组患者均行标准12导联心电图及彩色多普勒超声心动图检测,均测量最大P波时限及最小P波时限,计算P波离散度。结果两组之间的P波最大时限(127.4±5.03vs.118.8±9.04)、P波离散度(47.5±7.80vs.38.2±9.21)、左室射血分数(LVEF)(38.5±3.30vs.42.1±5.62)比较均有显著性差异(p<0.01),P波最小时限比较有统计学意义,左房内径(4.3±0.3vs.4.1±0.8)比较无统计学意义。A组的LVEF值和P波最大时限、P波离散度呈负相关性。结论P波离散度、P波最大时限、LVEF值对扩张型心肌病是否并发阵发性房颤是简单可靠的预测指标。
Objective To investigate the correlation between P wave dispersion and cardiac function in patients with dilated cardiomyopathy and paroxysmal atrial fibrillation and their predictive value for the onset of atrial fibrillation. Methods Sixty-four patients with dilated cardiomyopathy were divided into two groups: group A (32 cases with paroxysmal atrial fibrillation) and group B (no paroxysmal atrial fibrillation). Two groups of patients underwent standard 12-lead ECG and color Doppler echocardiography, measuring both the maximum and minimum P-wave P-wave time limit, calculate the P-wave dispersion. Results The maximum duration of P wave (127.4 ± 5.03vs.118.8 ± 9.04), P wave dispersion (47.5 ± 7.80vs.38.2 ± 9.21), LVEF (38.5 ± 3.30vs. 42.1 ± 5.62) (p <0.01). The minimum time of P wave was statistically significant. The left atrial diameter (4.3 ± 0.3 vs.4.1 ± 0.8) was not statistically significant. A group of LVEF value and P wave maximum time limit, P wave dispersion was negatively correlated. Conclusions P wave dispersion, maximum time of P wave and LVEF are simple and reliable predictors of whether dilated cardiomyopathy is complicated by paroxysmal atrial fibrillation.