慢性房速是一种少见的室上性心律失常,其临床表现、心电图特点和对治疗的反应均有别于阵发性室上速。本病确切的发病率不详,文献中以个案或数例报告者居多。近年来,我们已发现十余例,随着对本病认识的提高,估计将有更多的病例发现。本病的病因尚不明,虽可伴发于心肌病等器质性心脏病,但有不少病例缺乏明显器质性心脏病的依据。发病机理亦未完全阐明,文献中有报道可用超速起搏终止发作者,但总的看来其发作形式不支持折返机理。抗心律失常药虽可使慢性房速发作时A-V传导阻滞增加,从而减 Chronic atrial tachycardia is a rare type of ventricular arrhythmia, its clinical manifestations, ECG characteristics and response to treatment are different from paroxysmal supraventricular tachycardia. The exact incidence of this disease is unknown, the majority of cases reported in the literature or cases. In recent years, we have found more than ten cases, with the understanding of the disease increased, it is estimated that there will be more cases found. The etiology of this disease is not yet known, although may be associated with structural heart disease such as cardiomyopathy, but many cases lack the basis for significant organic heart disease. Pathogenesis has not been fully elucidated, there are reports in the literature can be used to terminate the author of speeding pacing, but in general its attack does not support the form of reentry. Although anti-arrhythmic drugs can make A-V block the increase of chronic atrial tachycardia, thereby reducing