Chandler S T, Trewby P N
Regional Medical Physics Department, Memorial Hospital, Darlington, UK.
Med Eng Phys. 1994 Jul;16(4):334-7. doi: 10.1016/1350-4533(94)90061-2.
Two quantitative techniques have been evaluated to examine whether respiratory sinus arrhythmia can be detected in atrial fibrillation. Cyclical changes in heart rate during deep breathing indicating respiratory sinus arrhythmia were seen in 11/15 control patients, but only 1/44 patients with atrial fibrillation. Power spectrum analysis suggested that more subtle variations in heart rate with breathing may be present in some patients with atrial fibrillation where it was not detectable by simpler techniques. These results support the hypothesis that although respiratory sinus arrhythmia is not detectable in atrial fibrillation by conventional means, there may still be some mediation of heart rate either by vagal or extravagal mechanisms.
已经评估了两种定量技术，以检查心房颤动患者是否可检测到呼吸性窦性心律不齐。15名对照患者中有11名在深呼吸时出现心率的周期性变化，提示存在呼吸性窦性心律不齐，但44名心房颤动患者中只有1名出现这种情况。功率谱分析表明，一些心房颤动患者的心率可能随呼吸存在更细微的变化，而这些变化用更简单的技术无法检测到。这些结果支持了以下假设：虽然通过传统方法在心房颤动中无法检测到呼吸性窦性心律不齐，但仍可能存在迷走神经或非迷走神经机制对心率的某种调节作用。
