Exploring the relationship between ventricular fibrillation recurrence after defibrillation in myocardial infarction and the effectiveness of renal sympathetic denervation therapy.

OBJECTIVE

This study aimed to explore the association between electrophysiological markers of early recurrence after defibrillation in post-myocardial infarction ventricular fibrillation and the therapeutic effects of sympathetic renal denervation, as well as to investigate the potential underlying mechanisms.

METHODS

Experimental research was conducted using an animal model. Myocardial infarction was induced, followed by defibrillation treatment for ventricular fibrillation cases, and the electrophysiological markers of early recurrence were recorded. Subsequently, a subset of animals underwent sympathetic renal denervation intervention, and the therapeutic effects were compared between the sympathetic renal denervation group and the control group. Electrocardiogram monitoring, histological analysis of myocardial tissue, and neurotransmitter measurements were also performed.

RESULTS

Following defibrillation treatment, early recurrence was observed in ventricular fibrillation cases. The electrophysiological markers revealed significantly higher ST segment elevation and T wave changes in the early recurrence group. However, in the sympathetic renal denervation intervention group, the early recurrence rate was significantly reduced, and the electrocardiogram showed improved stability and regularity. Additionally, histological analysis of myocardial tissue demonstrated less cellular damage and lower levels of myocardial fibrosis in the sympathetic renal denervation group. Neurotransmitter measurements revealed a significant decrease in sympathetic nerve activity in the sympathetic renal denervation intervention group.

CONCLUSION

The results of this study indicate an association between electrophysiological markers of early recurrence after defibrillation in post-myocardial infarction ventricular fibrillation and the therapeutic effects of sympathetic renal denervation. Sympathetic renal denervation intervention can significantly reduce the early recurrence rate, improve electrocardiogram characteristics, and alleviate myocardial damage and fibrosis. Furthermore, the reduction in sympathetic nerve activity may be one of the potential underlying mechanisms of sympathetic renal denervation intervention.