Abstract：
The efficacy of cardiac resynchronization therapy (CRT) in patients with a narrow QRS duration has not been established. We present a patient with a narrow QRS duration and left anterior fascicular block in which CRT was effective. Left ventricular lead implantation at the optimal site and appropriately-timed left ventricular pacing (LVP) resulted in left ventricle reverse remodeling. Left ventricular dyssynchrony did not improve with LVP at a timing that resulted in narrower QRS than an intrinsic QRS duration. The optimization of LVP timing in CRT for patients with a narrow QRS duration is discussed.
摘要：
心脏再同步化治疗（CRT）在QRS持续时间较窄的患者中的疗效尚未确定。我们介绍了一名QRS持续时间狭窄且左前分支传导阻滞的患者，其中CRT有效。在最佳位置植入左心室导线并适当定时左心室起搏（LVP）会导致左心室逆向重构。在导致QRS比固有QRS持续时间更窄的时间，LVP并未改善左心室不同步。讨论了QRS持续时间窄的患者在CRT中LVP定时的优化。
