上胸段硬膜外阻滞治疗不稳定型心绞痛对心电图Q-T离散度的作用

Reduction of Q T Interval Dispersion by Thoracic Epidural Anesthesia in Patients with Unstable Angina Pectoris

对１５例顽固性不稳定型心绞痛施行上胸段硬膜外阻滞（Ｔ１～Ｔ５）治疗，并分析阻滞前后的临床效果和对心电图ＱＴ离散度的影响。结果显示，硬膜外阻滞１５ｍｉｎ后临床症状显著改善，心电图ＮＳＴ和ＳＴ显著降低（Ｐ＜００１），ＱＴ离散度显著减少（Ｐ＜００５）。提示上胸段硬膜外阻滞不但能改善临床症状和心肌缺血，而且对减少ＱＴ离散度有显著作用。

We assessed the effect of thoracic epidural anesthesia (TEA) on severe unstable angina pectoris and Q T dispersion in 15 patients blocked from T1 to T5. 6ml of 0.5% lidocain HCL was injected through an epidural catheter placed at T3 T4 or T4 T5.Clinical effect and electrocardiograph recordings were obtained before and 15 mine after lidocain injection.The results showed that TEA induced amelioration of clinic symptoms,decrease of ST segment depression significantly ( P <0.01) and reduction of Q T interval dispersion ( P <0.05).It indicates that TEA may contribute to clinical benefits of unstable angina pectoris and reduction of Q T interval dispersion.