Objective  To investigate the predictive value of fragmentation QRS wave on ven-tricular arrhythmias in patients with ST-segment elevation myocardial infarction (STEMI).  

Method  A total of 148 patients with STEMI with left anterior descending lesion (n=49), right coronary artery lesion (n=49) and circumflex branch lesion (n=50) diagnosed and treated by Maoming People's Hospital from June 2020 to October 2021 were enrolled. Patients were given routine 12-lead ECG, and divided into two groups: fragmented QRS waves or non-fragmentation QRS waves. According to the 24-hour ambu-latory electrocardiogram detection, to analyze whether the patient has ventricular arrhythmia. The in-dexes of fragmentation QRS and the relationship between fragmentation QRS wave and heart rate vari-ability were compared and analyzed.

Result  The incidence of fragmentation QRS wave in STEMI pa-tients was 38.51%. The incidence of ventricular arrhythmias was 66.22%. The incidence of infarct in-farct wall, LVDD, ventricular arrhythmia, malignant arrhythmia, and cardiogenic death in the fragmen-tation QRS wave group were significantly higher than those in the non-fragmentation QRS wave group, while LVEF was significantly lower than that in the non-fragmentation QRS wave group. The PNN50, rMSSD, SDANNindex, and SDNN indexes of patients in the fragmentation QRS wave group were signifi-cantly lower than those in the non-fragmentation QRS wave group.

Conclusion  The probability of ventricular arrhythmia in STEMI patients with fragmentation QRS wave is significantly increased, and the heart rate variability index of patients with fragmentation QRS wave is significantly reduced, which has certain clinical value in predicting the occurrence of ventricular arrhythmia in patients.

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