Haiyang Xiao, Liang Sun

(1. Cardiology Department of Hefei Eighth People's Hospital; 2. Medical College of Jinzhou Medical University)

Abstract：

With the widespread application of artificial permanent pacemakers in clinical practice, there have been new changes in the indications for pacemaker implantation. The current clinical indications include high atrioventricular block, sick sinus syndrome, cardiac resynchronization therapy for heart failure, and implantation of cardioverter defibrilla‐ tors for ventricular arrhythmias. The implantation of a pacemaker can improve the quality of life and prognosis of patients with arrhythmia. In the past, permanent pacemaker implantation was performed in clinical practice, and the right ventricular pacing electrode was often fixed at the apex of the right ventricle, which belongs to non physiological pacing. Through long-term clinical follow-up, it was found that apex pacing can easily cause abnormal depolarization of the left ventricle, asynchronous contraction of the myocardium, and ultimately lead to myocardial fibrosis, which has adverse effects on the patient's cardiac function and psychological state. In recent years, Scholars have found that pacing in the right ventricular outflow tract septum is closer to the atrioventricular node and closer to the His bundle Purkinje fibers. The pacing impulse almost simultaneously expands towards both ventricles, closer to the physiological pacing state, thereby reducing the occurrence of cardiovascular events in patients. This article explores the impact of pacing in different parts of the heart on the cardiac function and psychological state of patients based on clinical data from the past three years.

Key Words：

pacing site; cardiac function; psychological state