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目的明确孤立性阵发性房颤(LPAF)患者的左房结构及功能与房颤发作频率的相关性。方法依据房颤发作频率将40例LPAF患者分成两组,A组为非频繁发作房颤组(每月发作≤1次),B组为频繁发作房颤组(每月发作>1次)。在房颤发作后(未使用抗心律失常药物)至少1周进行超声心动图检查。结果 B组的左房最大容积指数(LAVImax)增加(P<0.05),左房主动射血分数(LAEFactive)有明显下降(P<0.05),两组间左房整体射血分数(LAEFtotal)及左房被动射血分数(LAEFpassive)差异无统计学意义(P>0.05)。结论房颤频繁发作患者LAEFactive明显下降,LAVImax明显增加。
Objective To investigate the relationship between left atrial structure and function and the frequency of atrial fibrillation in patients with isolated paroxysmal atrial fibrillation (LPAF). Methods According to the frequency of atrial fibrillation, 40 patients with LPAF were divided into two groups. Group A was infrequently atrial fibrillation (≤1 episode per month) and group B was a frequent episode of atrial fibrillation (> 1 episode per month). Echocardiography was performed at least one week after the onset of atrial fibrillation (no antiarrhythmic drugs were used). Results The left atrium maximum volume index (LAVImax) increased significantly in group B (P <0.05), LAEFactive decreased significantly (P <0.05), LAEFtotal and Left atrial passive ejection fraction (LAEFpassive) no significant difference (P> 0.05). Conclusions LAEFactive decreased significantly and LAVImax increased significantly in patients with frequent AF.