心房颤动持续时间对左心房内径的影响

摘要

目的 探讨心房颤动(房颤)持续时间与左心房大小的关系及其临床意义.方法 选择78例阵发性房颤、48例持续性房颤、22例永久性房颤患者,利用入院后首次超声心动图检测其左心房收缩末内径及左心室射血分数.结果 阵发性房颤组患者左心房内径24～41(36.3±5.8)mm,增大2例(2.6%);持续性房颤组患者左心房内径29～49(43.7±6.8)mm,增大26例(54.2%);永久性房颤组左心房内径32～50(49.8:±5.6)mm,增大18例(81.8%).从阵发性房颤组、持续性房颤组到永久性房颤组左心房内径逐渐增大;持续性房颤组与阵发性房颤相比,及永久性与阵发性房颤相比,差异均有统计学意义(P＜0.05).阵发性房颤组、持续性房颤组及永久性房颤组左心室射血分数分别为(58±10)%、(54±25)%、(50±15)%,随房颤持续时间而逐渐下降.持续性房颤组、永久性房颤组分别与阵发性房颤组相比,差异均具有统计学意义(P＜0.05).结论 房颤是左心房扩大的原因之一,房颤持续时间越长,左心房扩大越显著.%Objective To compare the effect of three types of atrial fibrillation on left atrial size and to investigate the relationship between atrial fibrillation and left atrium. Methods Totally 78 patients of paroxysmal atrial fibrillation, 48 patients of persistent atrial fibrillation and 22 patients with permanent atrial fibrillation were analyzed by echocardiography. Left atrial end systolic diameter and Left ventricular ejection fraction were measured.Results Of the three groups of patients, the largest left atrial dimension was found in and the left atrial dimension in group of paroxysmal atrial fibrillation was the lowest ( P ＜ 0.05 ). Meanwhile the Left ventricular ejection fraction was the highest in the group of permanent atrial fibrillation(P ＜0.05). Conclusions Atrial fibrillation is one of the causes of left atrial enlargement. The longer the duration of atrial fibrillation is, the more significant enlargement left atrium showes.