CRT术后QRS波时限改变对左心功能的影响

目的 观察顽固性充血性心力衰竭(CHF)患者心脏再同步化治疗(CRT)术后QRS波时限改变及其对左心功能的影响.方法 60例患者接受CRT术,心功能(NYHA分级)Ⅲ～Ⅳ级,左室射血分数(LVEF)11%～35%(27.15±6.35%),左室舒张末期内径(LVEDd)60～106mm(75.35±11.01mm),Q...

The effect of QRS wave duration changes to left ventricular function after CRT in patients with refractory congestive heart failure

Objective To observe the effect of QRS wave time changes to left ventricular function after cardiac resynchronization therapy（CRT） in patients with refractory heart failure.Methods 60 patients receive CRT,cardiac function（NYHA classification） level Ⅲ～Ⅳ,left ventricular ejection fraction（LVEF） 11%～35%（27.15±6.35%）,and left ventricular end-diastolic diameter（LVEDd） 60～106mm（75.35±11.01mm）,QRS duration up to 110ms～190ms（139.17±23.69ms）.The effects of QRS wave duration changes to left ventricular function after CRT with refractory heart failure were observed.Results QRS wave durations after CRT are reduced from 139.17±23.69 to 124.08±16.91ms,shorten 15.42±28.90ms;Left ventricular function levels are improved from preoperative 3.5±0.5 to postoperative 2.5±0.5,improved 1.0±0.5.QRS wave durations before CRT and changes of left ventricular function after CRT are not related,r≈0.The differences of QRS wave duration between preopration and postopration of CRT and changes of left ventricular function after CRT have partially positive relationship,r=0.148.Conclusion QRS wave duration and changes of heart function after CRT has improved significantly,preoperative QRS waves duration cannot predict changes of heart function（NYHA classification）,the differences of QRS wave duration between preopration and postopration of CRT have some predictive values to heart function after CRT.