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目的研究QT离散度预测老年急性心肌梗死患者发生室性心律失常的临床价值。方法选择140例老年急性心肌梗死患者作为研究对象,根据心电图检查结果分为校正的QT离散度(QTcd)≥60 ms的观察组和QTcd<60 ms的对照组,观察住院期间室性心律失常发生情况及心功能指标。结果观察组患者发生室性期前收缩、非持续性室性心动过速、持续性室性心动过速、心室颤动的例数多于对照组(P<0.05);左心室舒张末期内径(Left ventricular end diastolic diameter,LVEDD)、舒张晚期充盈峰速度(A峰)值均高于对照组(P<0.05);舒张早期充盈峰速度(E峰)、E/A值、左室射血分数(Left Ventricular Ejection Fractions,LVEF)值均低于对照组(P<0.05);QTcd与室性心律失常的发生呈正相关。结论 QT离散度能够较好的预测老年急性心肌梗死患者室性心律失常的发生及心功能的改变,具有一定的临床价值。
Objective To study the clinical value of QT dispersion in predicting ventricular arrhythmia in elderly patients with acute myocardial infarction. Methods A total of 140 elderly patients with acute myocardial infarction were selected as study subjects. According to the results of electrocardiogram examination, the patients were divided into two groups: observation group with corrected QT dispersion (QTcd) ≥60 ms and control group with QTcd <60 ms, and ventricular arrhythmia Situation and cardiac function indicators. Results In the observation group, there were more cases of premature ventricular contractions, non-sustained ventricular tachycardia, persistent ventricular tachycardia and ventricular fibrillation than those in the control group (P <0.05). Left ventricular end-diastolic diameter LV diastolic diameter, LVEDD, and peak diastolic filling peak velocity (A peak) were significantly higher than those in the control group (P <0.05); peak early diastolic filling velocity (E peak), E / A, left ventricular ejection fraction Left Ventricular Ejection Fractions, LVEF) values were lower than the control group (P <0.05); QTcd and ventricular arrhythmia was positively correlated. Conclusion QT dispersion can better predict ventricular arrhythmia and changes of cardiac function in elderly patients with acute myocardial infarction, and has certain clinical value.