Neuss H, Spies H F, Schlepper M
Z Kardiol. 1977 May;66(5):231-7.
In 20 patients with WPW-syndrome, the effective refractory periods of accessory A-V conduction were measured by programmed atrial stimulation during His-bundle electrography. The effects of basic heart rate on this parameter were evaluated. Three groups of patients were distinguished: A) The effective refractory periods of accessory A-V conduction were clearly longer than the effective refractory periods of the right atrium in 12 patients. In these patients, acceleration of heart rate shortened the effective refractory period of accessory A-V conduction. Refractoriness of accessory A-V conduction was a linear function of cycle length. B) Block of accessory A-V conduction occured at a rather long basic cycle length in three patients. No rate dependency of refractoriness could be evaluated. Methodical problems regarding the determination of effective refractory period of accessory A-V conduction were discussed. The significance of the parameter in question in respect to the trigger mechanism of paroxysmal supraventricular tachycardias (echozone) and the ventricular rate during atrial tachycardias were demonstrated.
在20例预激综合征患者中，在希氏束电图检查期间通过程控心房刺激测量房室旁道传导的有效不应期。评估基础心率对该参数的影响。区分出三组患者：A）12例患者的房室旁道传导有效不应期明显长于右心房有效不应期。在这些患者中，心率加快缩短了房室旁道传导的有效不应期。房室旁道传导的不应期是心动周期长度的线性函数。B）3例患者在相当长的基础周期长度时发生房室旁道传导阻滞。无法评估不应期的频率依赖性。讨论了关于房室旁道传导有效不应期测定的方法学问题。证明了该参数在阵发性室上性心动过速（回声区）触发机制以及房性心动过速期间心室率方面的意义。
