Takahashi N, Imataka K, Seki A, Fujii J
Jpn Heart J. 1982 Sep;23(5):677-83. doi: 10.1536/ihj.23.677.
The present study was designed to examine whether the left atrium is dilated in paroxysmal atrial fibrillation or not. Left atrial dimension (LAD) on M-mode echocardiogram was (1) 23.3 +/- 0.7 mm (mean +/- S.E.) in 24 normal subjects, (2) 30.5 +/- 0.7 mm in 58 patients without atrial fibrillation who had hypertension and/or ischemic heart disease, (3) 35.5 +/- 0.9 mm in 27 patients with paroxysmal atrial fibrillation of whom 23 had non-rheumatic cardiovascular diseases and 4 had idiopathic atrial fibrillation, (4) 40.5 +/- 1.1 mm in 38 patients with persistent atrial fibrillation of whom 30 had nonrheumatic cardiovascular diseases and 8 had idiopathic atrial fibrillation, and (5) 53.3 +/- 2.0 mm in 17 patients with persistent atrial fibrillation who had rheumatic heart disease. LAD showed a stepwise and significant increase from the first to the fifth group. LAD of patients with paroxysmal atrial fibrillation was not related to either the number or duration of paroxysms. These results indicate that the left atrium is slightly dilated in patients with paroxysmal atrial fibrillation.
本研究旨在探讨阵发性心房颤动患者的左心房是否扩大。M型超声心动图测得的左心房内径（LAD）如下：（1）24名正常受试者为23.3±0.7mm（均值±标准误）；（2）58名无房颤但患有高血压和/或缺血性心脏病的患者为30.5±0.7mm；（3）27名阵发性心房颤动患者为35.5±0.9mm，其中23例患有非风湿性心血管疾病，4例为特发性心房颤动；（4）38名持续性心房颤动患者为40.5±1.1mm，其中30例患有非风湿性心血管疾病，8例为特发性心房颤动；（5）17名患有风湿性心脏病的持续性心房颤动患者为53.3±2.0mm。LAD从第一组到第五组呈逐步显著增加。阵发性心房颤动患者的LAD与发作次数或发作持续时间均无关。这些结果表明，阵发性心房颤动患者的左心房有轻度扩大。
