心律不整(arrhythmia)大致可分為快速心律(tachyarrhythmia)、慢性心律(bradyarrhythmia)及不規則早期收縮(premature contractions)三大類;快速心律包括房室結迴旋頻脈(atrioventricular nodal reentry tachycardia[AVNRT]),併有副傳導徑路(accessory pathway)WPW症候群之房室迴旋頻脈(atrioventricular reciprocating tachycardia[AVRT]),心房性頻脈(atrial tachycardia)(以上三種統稱為陣發性上心室頻脈(paroxysmal supraventricular tachycardia[PSVT])、心房撲動(atrial flutter)、心房顫動(atrial fibrillation)、心室頻脈(ventricular tachycardia)以及心室顫動(ventricular fibrillation),而慢速心律則以竇房結病變症候群(sick sinus syndrome [SSS])及房室傳導阻礙(atrioventricular conduction block)最常見。 |