Conclusion AAI is a reliable and safe mode of pacing, and provides normal A-V sequence and hemodynamics.Thus, atrial pacing is apparently superior to ventricular pacing.

• 结论心房起搏是一种安全的起搏方式，可保持正常的房室收缩顺序功能及血流动力学效果，而明显优于心室起搏。