Behl P R, Holden M P
Eur Heart J. 1984 Nov;5(11):919-23. doi: 10.1093/oxfordjournals.eurheartj.a061592.
Eighty patients were studied to determine whether dysphagia (delayed transit through oesophagus) occurs in the presence of an enlarged left atrium. Twenty-six patients (group A), with no enlargement of the left atrium but undergoing open heart surgery, were randomly selected as controls. Group B (N = 54) consisted of patients undergoing mitral valve surgery with varying degrees of left atrial enlargement. All patients were requested to swallow, in the standing position, a barium filled capsule or barium filled Slow K tablets. If there was no hold up in the oesophagus the procedure was repeated with the patient seated. When hold up occurred the patient was screened at 5, 10 and 15 min. No hold up was found in any patient in the control group (N = 26). 50% of patients with left atrial enlargement had some degree of hold up, the incidence and duration of which correlated with the size of the atrium. Hold up was just as likely to occur with a capsule or with a 'slow K' tablet. When hold up lasted for more than 15 min, water did not flush away the 'stuck' medicament, but a bolus of solid food did.
对80名患者进行了研究，以确定在左心房增大的情况下是否会出现吞咽困难（食管传输延迟）。随机选择26名左心房未增大但接受心脏直视手术的患者作为对照组（A组）。B组（N = 54）由接受二尖瓣手术且左心房有不同程度增大的患者组成。要求所有患者站立位吞咽一颗装有钡剂的胶囊或含钡的缓释钾片。如果食管没有阻塞，则让患者坐位重复该操作。当出现阻塞时，在5、10和15分钟时对患者进行筛查。对照组的26名患者中未发现任何阻塞情况。50%的左心房增大患者有一定程度的阻塞，其发生率和持续时间与心房大小相关。胶囊或缓释钾片发生阻塞的可能性相同。当阻塞持续超过15分钟时，水无法冲掉“卡住”的药物，但一团固体食物可以。
