应用房室同步起搏治疗梗阻性肥厚型心肌病（OHCM）取得血流动力学与临床症状改善国内外已有报道，但对不同A－V间期改变对左室血流动力学指标影响报道尚少。本文通过对使用双腔起搏治疗的2例OHCM分析，以寻找最佳的A－V间期。1资料与方法2例为同胞姐妹，姐姐（例1）43岁，妹妹 Application of atrioventricular synchronized pacing in obstructive hypertrophic cardiomyopathy (OHCM) to obtain hemodynamic and clinical symptoms have improved at home and abroad have been reported, but different A-V interval changes on the impact of left ventricular hemodynamic parameters reported Still less. This article examines two OHCM analyzes using dual-chamber pacing to find the best A-V interval. 1 Materials and Methods 2 cases for siblings sisters, sister (Example 1) 43-year-old sister