阵发性室上性心动过速,是指心房或房室交界的地方连续发生3次以上的快速而规则的异位心律。发作时心率为160～220次/分钟,脉搏快而弱但规则;每次发作一般持续数秒、数分钟或数小时,少数病人可持续数天、数星期,甚至数月;发作时有胸闷、心悸、头晕、多尿等症状;发作时间较长者,可有面色苍白、大汗 Paroxysmal supraventricular tachycardia, refers to the atria or atrioventricular junction where more than 3 consecutive occurrences of fast and regular ectopic rhythm. Heart attack rate of 160 to 220 beats / min, fast and weak pulse but the rules; each attack generally lasts for a few seconds, a few minutes or hours, a few patients can last for days, weeks, or even months; onset of chest tightness, Palpitations, dizziness, polyuria and other symptoms; longer attack time, may have pale, sweating