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有关慢性窦房结功能不全的临床电生理学特征已积累相当资料。窦房结疾病或病态窦房结综合征(SSS)的心电图表现包括:(1)显著窦性心动过缓,(2)心动过缓-过速综合征——交替出现心动过缓与室上性快速心律失常,偶或室性心动过速,(3)无房性或连接处性逸搏的窦性静止,(4)窦房传出阻滞。临床上 SSS 常伴疲乏、昏眩、晕厥以及心悸等各种症状。持久或间歇性窦性心动过缓是诊断窦房结功能不全的基本条件,但应除外伴有窦性
Clinical electrophysiological characteristics of chronic sinus node dysfunction have accumulated considerable information. Electrocardiographic findings of sinus node disease or sick sinus syndrome (SSS) include: (1) significant sinus bradycardia, (2) bradycardia-tachyarrhythmia-alternated bradycardia with supraventricular Tachyarrhythmia, even or ventricular tachycardia, (3) sinus atherosclerosis without atrial or junction, (4) sinoatrial block. SSS often accompanied by clinical fatigue, dizziness, fainting and heart palpitations and other symptoms. Long-lasting or intermittent sinus bradycardia is the basic condition for diagnosis of sinus node dysfunction, but should be accompanied by sinus