Hellestrand K J, Nathan A W, Camm A J
Br Heart J. 1982 May;47(5):504-6. doi: 10.1136/hrt.47.5.504.
In a patient who presented with syncope and palpitation left carotid sinus massage resulted in prolonged ventricular asystole during atrial fibrillation. In the same patient left carotid sinus stimulation during sinus rhythm produced no change in sinus rate and only slight PR interval prolongation. This very different response may be the result of factors which are relevant only during atrial fibrillation such as an increase in the atrial depolarisation frequency and a prolongation of the duration of the atrioventricular nodal concealment zone secondary to increased vagal activity. An increase in atrioventricular nodal refractoriness could not explain this differential response.
一名出现晕厥和心悸症状的患者，左侧颈动脉窦按摩在房颤期间导致心室停搏延长。在同一名患者中，窦性心律时进行左侧颈动脉窦刺激，窦性心率未发生变化，仅PR间期稍有延长。这种截然不同的反应可能是仅在房颤期间才相关的因素导致的，比如心房去极化频率增加以及迷走神经活动增强继发的房室结隐匿区持续时间延长。房室结不应期增加无法解释这种差异反应。
