结论：增加左心室后负荷诱发室性心律失常，与左室空间不应期离散增加有关。
CONCLUSION: Ventricular arrhythmia induced by increasing afterload in LV related to increase of temporal dispersion of refractory period.
而对其兴奋性、自律性、不应期无明显影响。
It had not effects on the excitability, automaticity and rhythmicity, refractory period.
结左房内径增大、心房不应期缩短可能是持续性房颤的病理机制。
Conclusion the increase of left atrial dimension, the shorten of refractory period of atrium maybe the pathological mechanism of atrial fibrillation.
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